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Department of Fundamental Research

Head of department prof., dr.  Vladas Vansevičius
prof., dr. Vladas Vansevičius

Main goals of the department:
1. Theoretical investigations and modelling of chaotic systems, neural networks, and nanostructures.
2. Theoretical and experimental investigations of fluctuations, hot electron and phonon dynamics.
3. Theoretical and observational investigations of complex megasystems. 

Research directions of the department:
1. Complex neural networks and desynchronization algorithms.
2. Chaos control algorithms.
3. Classical and quantum electron systems.
4. Terahertz radiation sources.
5. Fluctuations and dynamics of coupled electron-phonon systems.
6. Plasmons in dynamics of highly excited electrons and phonons.
7. Spectrophotometry of megasystems.
8. Chemodynamical evolution of complex megasystems.

Laboratories:

Equipment, Software and methods

Nonlinear Dynamics and Nanophysics Laboratory

The analysis of nonlinear dynamics, quantum and kinetic problems are performed by means of various approximate analytical (a method of separation of fast and slow motions, averaging method, phase reduction method, etc.) as well as numerical (algorithms of numerical integration of differential equations, Monte Carlo method, etc.) methods

Fluctuation research laboratory
Nanosecond gated microwave X-band/Ka band modulation-type radiometric setup for measurement of hot-electron fluctuations at microwave frequencies. On-wafer measurements at room temperature are conducted using coaxial probe station. Waveguide probing can be used instead at a liquid nitrogen temperature. Fluctuations are measured only during the short pulse and that enables the research of kinetic processes in semiconductors. Voltage pulse duration ranges from 10 nanoseconds to 15 microseconds. Electric fields can exceed 100 kV/cm. Joule heating becomes unimportant because of short pulses.
Capacitance-voltage (50 kilohertz – 30 megahertz) and voltage-current measurement system available. It can be used for electron gas profile estimation in the 2DEG transistor channels as well as finding of 2DEG density.   
Agilent–Süss–Maury spectrometer for transistor on wafer measurements of microwave response and noise spectra and microwave power at frequencies from 0.1 to 50 GHz. The main direction – SiGe heterobipolar transistors and GaN heterostructure field effect transistors.
Nanosecond voltage-pulse setup (pulse duration 0.2...100 ns) is used for hot-electron drift velocity measurements in electric field range up to 300 kV/cm. Channel self-heating effects are minimized.  
Electro-magnet (2 Tesla)  

Monte Carlo and other codes are available for numerical simulation of hot-electron fluctuations in semiconductor heterostructures and transistors.
projects
  • Nonlinear Dynamics and Nanophysics Laboratory
    Research Council of Lithuania, the project “Synchronization and chaos control algorithms for nonlinear systems using periodically switched time-delayed feedback”, project leader prof. K. Pyragas (2014–2017).
    The project deals with control algorithms based on periodically switched time-delayed feedback and their application to the problems of chaos control (stabilization of unstable periodic orbits), the anticipating synchronization problems, and the problems of desynchronizing the neural networks.
  • Fluctuation research laboratory
    Research Council of Lithuania, project “Optimal power-reliability trade-off in quantum well channels”, prof. A. Matulionis (2016-2019).
    Project research is focused on the GaN and its (In,Al) compounds as well as on ZnO (which have many similar properties to GaN) and its (Be,Mg) compounds based quantum channels. The aim is an optimisation of HEMT quantum channels for the best power-reliability trade-off.
  • Electronic Structure Theory Laboratory
    M-ERA.NET project „Metrology at the nanoscale with diamonds“ („MyND“), leader of the Lithuanian partner is dr. Audrius Alkauskas, the coordinator of the project is prof. Ruvin Feber (University of Latvia) (2015–2018).
    The project conducted together with the Laser Center of the University of Latvia and Latvian Solid State Physics Institute. The project is devoted to the use of point defects in diamond (so-called NV centers) for detected of varying magnetic fields at the nanoscale.
  • Megasystem physics laboratory
    1. Research Council of Lithuania, the project „Low‐Mass Dwarf Galaxy Evolution” of the national research program „Towards future technologies”, project leader prof. V. Vansevičius (2016–2018).
    The main objective of the project is to reveal the evolution of isolated galaxies residing in low‐mass dark matter haloes from the early Universe to the present day.

    2. Research Council of Lithuania, the project “Star Formation in Galaxy Disks: Global vs. Local“, project leader dr. D. Narbutis (2015–2018).
    The project aims to determine spatial and dynamical parameters of ongoing star formation in the galaxy NGC598 disk by coordinated use of observational data obtained with ground- and space-based telescopes.

Most important publications
  1. Kriščiūnas, Eimantas; Daugevičius, Karolis; Stonkutė, Rima; Vansevičius, Vladas. Deriving physical parameters of unresolved star clusters. VII. Adaptive aperture photometry of the M 31 PHAT star cluster // Astronomy & astrophysics. ISSN 0004-6361. 2023, vol. 677, art. no. A100, p. 1-8.
  2. Bischetti, Manuela; Fiore, Fabrizio; Feruglio, Chiara; D’Odorico, Valentina; Arav, Nahum; Costa, Tiago; Zubovas, Kastytis; Becker, George; Bosman, Sarah E. I.; Cupani, Guido; Davies, Rebecca; Eilers, Anna-Christina; Paolo Farin, Emanuele; Ferrara, Andrea; Gaspari, Massimo; Mazzucchelli, Chiara; Onoue, Masafusa; Piconcelli, Enrico; Zanchettin, Maria Vittoria; Zhu, Yongda. The fraction and kinematics of broad absorption line quasars across cosmic time // Astrophysical journal. ISSN 0004-637X. 2023, vol. 952, no. 1, art. no. 44, p. 1-15
  3. Zhao, Fangzhou; Turiansky, Mark E.; Alkauskas, Audrius; Van de Walle, Chris G. Trap-assisted Auger-Meitner recombination from first principle//Physical review letters. ISSN 0031-9007. 2023, vol.131, iss. 5, art. no. 056402, p. 1-6.
  4. Zubovas, Kastytis; Maskeliūnas, Gediminas. Life after AGN switch off: evolution and properties of fossil galactic outflows//Monthly notices of the Royal Astronomical Society. ISSN 0035-8711. 2023, vol. 524, iss. 4, p. 4819-4840.
  5. Maciaszek, Marek Zbigniew; Žalandauskas, Vytautas; Silkinis, Rokas; Alkauskas, Audrius; Razinkovas, Lukas. The application of the SCAN density functional to color centers in diamon//Journal of chemical physics. ISSN 0021-9606. 2023, vol. 159, iss. 8, art. no. 084708, p. 1-8.
  6. Ardaravičius, Linas; Kiprijanovič, Oleg. Detailed look into the unstable S-N border during propagation of the N-zone into the thin YBaCuO film // Physica scripta. ISSN 0031-8949. 2023, vol. 98, iss. 5, art. no. 055924, p. 1-10.
  7. Hanlon, Liam; Olney-Fraser, Michael; Doherty, Marcus W.; Razinkovas, Lukas. Enhancement of spin-to-charge conversion of diamond NV centers at ambient conditions using surface electrodes // Physical review B. ISSN 2469-9950. 2023, vol. 107, iss.13, art. no. 134111, p. 1-8.
  8. Ivaškevičiūtė-Povilauskienė, Rusnė; Čižas, Vladislovas; Nacius, Ernestas; Grigelionis, Ignas; Redeckas, Karolis; Bernatonis, Matas; Orlovas, Sergejus; Valušis, Gintaras; Minkevičius, Linas. Flexible terahertz optics: light beam profile engineering via C-shaped metallic metasurface // Frontiers in physics. ISSN 2296-424X. 2023, vol. 11, art. no. 1196726, p. 1-9.
  9. Pyragas, Viktoras; Pyragas, Kęstutis. Effect of Cauchy noise on a network of quadratic integrate-and-fire neurons with non-Cauchy heterogeneities // Physics letters A. ISSN 0375-9601. 2023, vol. 480, art.no. 128972, p. 1-8.
  10. Ardaravičius, Linas; Kiprijanovič, Oleg; Šermukšnis, Emilis; Avrutin, Vitaliy; Özgür, Ümit; Morkoç, Hadis. Determination of hot-electron drift velocity in (Be)ZnMgO/ZnO 2DEG channels // Physica scripta. ISSN 0031-8949. 2023, vol. 98, no. 1, art. no. 015808, p. 1-10.
  11. Berškys, Justas; Orlovas, Sergejus. Accelerating Airy beams with particle-like polarization topologies and free-space bimeronic lattices // Optics letters. ISSN 0146-9592. 2023, vol. 48, iss. 5, p. 1168-1171.
  12. Stonkutė, Rima; Vansevičius, Vladas. Dwarf irregular galaxy Leo A. II. Suprime-Cam R and H alpha stellar photometry // Astrophysical journal supplement series. ISSN 0067-0049. 2022, vol. 259, iss. 1, art. no. 6, p. 1-5
  13. Leščinskaitė, Alina; Stonkutė, Rima; Vansevičius, Vladas. Recent star formation history of the dwarf irregular galaxy Leo A // Astronomy & astrophysics. ISSN 0004-6361. 2022, vol. 660, art. no. A79, p. 1-10.
  14. Šermukšnis, Emilis; Jorudas, Justinas; Šimukovič, Artūr; Kovalevskij, Vitalij; Kašalynas, Irmantas. Self-heating of annealed Ti/Al/Ni/Au contacts to two-dimensional electron gas in AlGaN/GaN heterostructures // Applied sciences. eISSN 2076-3417. 2022, vol. 12, iss. 21, art. no. 11079, p. 1-17.
  15. Zubovas, Kastytis; Bialopetravičius, Jonas; Kazlauskaitė, Monika. Determining active galactic nucleus luminosity histories using present-day outflow properties: a neural network-based approach // Monthly notices of the Royal Astronomical Society. ISSN 0035-8711. 2022, vol. 515, iss. 2, p. 1705-1722.
  16. Tartėnas, Matas; Zubovas, Kastytis. Improving black hole accretion treatment in hydrodynamical simulations // Monthly notices of the Royal Astronomical Society. ISSN 0035-8711. 2022, vol. 516, iss. 2, p. 2522-2539
  17. Ratas, Irmantas; Pyragas, Kęstutis. Interplay of different synchronization modes and synaptic plasticity in a system of class I neurons // Scientific reports. ISSN 2045-2322. 2022, vol. 12, art. no. 19631, p. 1-17.
  18. Ivaškevičiūtė-Povilauskienė, Rusnė; Kizevičius, Paulius; Nacius, Ernestas; Jokubauskis, Domas; Ikamas, Kęstutis; Lisauskas, Alvydas; Alexeeva, Natalia; Matulaitienė, Ieva; Jukna, Vytautas; Orlovas, Sergejus; Minkevičius, Linas; Valušis, Gintaras. Terahertz structured light: nonparaxial Airy imaging using silicon diffractive optics // Light: science & applications. eISSN 2047-7538. 2022, vol. 11, art. no. 326, p. 1-13.
  19. Vindolet, Baptiste; Adam, Marie-Pierre; Toraille, Loïc; Chipaux, Mayeul; Hilberer, Antoine; Dupuy, Géraud; Razinkovas, Lukas; Alkauskas, Audrius; Thiering, Gergő; Gali, Adam; De Feudis, Mary; Ngandeu Ngambou, Midrel Wilfried; Achard, Jocelyn; Tallaire, Alexandre; Schmidt, Martin; Becher, Christoph; Roch, Jean-François.  Optical properties of SiV and GeV color centers in nanodiamonds under hydrostatic pressures up to 180 GPa  // Physical review B. ISSN 2469-9950. 2022, vol. 106, iss. 21, art. no. 214109, p. 1-7.
  20. Vardarli, Eren; Sakalas, Paulius; Schroter, Michael. A 5.9 mW E-/W-band SiGe-HBT LNA with 48 GHz 3-dB bandwidth and 4.5-dB noise figure // IEEE microwave and wireless components letters. ISSN 1531-1309. 2022, vol. 32, iss. 12, p. 1451-1454.
  21. Laurinavičius, Klemensas; Orlovas, Sergejus; Gajauskaitė, Ada. Azimuthally and radially polarized pulsed Bessel-X vortices // Optik. ISSN 0030-4026. 2022, vol. 270, art. no. 169998, p. 1-11.
  22. Vosylius, Žygimantas; Novičkovas, Algirdas; Laurinavičius, Klemensas; Tamošiūnas, Vincas. Rational design of scalable solar simulators with arrays of light-emitting diodes and double reflectors // IEEE journal of photovoltaics. ISSN 2156-3381. 2022, vol. 12, no. 2, p. 512-520.
  23. Pyragas, Viktoras; Pyragas, Kęstutis. Mean-field equations for neural populations with q -Gaussian heterogeneities // Physical review E. ISSN 2470-0045. 2022, vol. 105, iss. 4, art. no. 044402, p. 1-10.
  24. Berškys, Justas; Orlovas, Sergejus. Spherically polarized vector Bessel vortex beams. Physical review A. ISSN 2469-9926. 2022, vol. 105, iss. 1, art. no. 013502, p. 1-10.
  25. Mavredakis, Nikolaos; Pacheco-Sanchez, Anibal; Sakalas, Paulius; Wei, Wei; Pallecchi, Emiliano; Happy, Henri; Jimenez, David. Bias-dependent intrinsic RF thermal noise modeling and characterization of single-layer graphene FETs. IEEE transactions on microwave theory and techniques. ISSN 0018-9480. 2021, vol. 69, iss. 11, p. 4639-4646.
  26. Maciaszek, Marek Zbigniew; Razinkovas, Lukas; Alkauskas, Audrius. Thermodynamics of carbon point defects in hexagonal boron nitride. Physical review materials. eISSN 2475-9953. 2022, vol. 6, iss. 1, art. no. 014005, p. 1-13.
  27. Jorudas, Justinas; Prystawko, Paweł; Šimukovič, Artūr; Aleksiejūnas, Ramūnas; Mickevičius, Jūras; Kryśko, Marcin; Michałowski, Paweł Piotr; Kašalynas, Irmantas. Development of quaternary InAlGaN barrier layer for high electron mobility transistor structures. Materials. eISSN 1996-1944. 2022, vol. 15, iss. 3, art. no. 1118, p. 1-11.
  28. Zubovas, Kastytis; King, Andrew. High-redshift SMBHs can grow from stellar-mass seeds via chaotic accretion. Monthly Notices of the Royal Astronomical Society. ISSN 0035-8711. 2021, vol. 501, p. 4289-4297.
  29. Naujalis, Rokas; Stonkutė, Rima; Vansevičius, Vladas. Deriving physical parameters of unresolved star clusters.VI. Adaptive aperture photometry of the M31 PHAT star clusters. Astronomy and astrophysics. ISSN 0004-6361. 2021, vol. 654, art. no. A6, p. 1-10.
  30. Gotovski, Pave; Šlevas, Paulius; Orlovas, Sergejus; Ulčinas, Orestas; Jukna, Vytautas; Urbas, Antanas. Investigation of the Pancharatnam–Berry phase element for the generation of the top-hat beam. Journal of optics. ISSN 2040-8986. 2022, vol. 24, iss. 3, art. no. 035607, p. 1-9.
  31. Gotovski, Pavel; Šlevas, Paulius; Orlovas, Sergejus; Ulčinas, Orestas; Urbas, Antanas. Generation of an optical needle beam with a laser inscribed Pancharatnam-Berry phase element under imperfect conditions. Optics express. ISSN 1094-4087. 2021, vol. 29, iss. 21, p. 33331-33345.
  32. Novičenko, Viktor; Ratas, Irmantas. Unstable delayed feedback control to change sign of coupling strength for weakly coupled limit cycle oscillators. Chaos. ISSN 1054-1500.  2021, vol. 31, art. no. 093138, p. 1-19.
  33. Razinkovas, Lukas; Maciaszek, Marek; Reinhard, Friedemann; Doherty, Marcus W.; Alkauskas, Audrius. Photoionization of negatively charged NV centers in diamond: theory and ab initio calculations. Physical review B. ISSN 2469-9950. 2021, vol. 104, iss. 23, art. no. 235301, p. 1-13. 
  34. Šermukšnis, Emilis; Liberis, Juozapas; Šimukovič, Artūr; Matulionis, Arvydas; Ding, K.; Avrutin, V.; Özgür, Ü.; Morkoç, H. Self-formation of high-field domain in epitaxial ZnO and its suppression in ZnO/MgZnO heterostructure. Applied physics letters. ISSN 0003-6951. 2021, vol. 118, no. 25, art. no. 252102, p. 1-9.
  35. Pyragas, Kęstutis; Fedaravičius, Augustinas Povilas; Pyragienė, Tatjana.  Suppression of synchronous spiking in two interacting populations of excitatory and inhibitory quadratic integrate-and-fire neurons. Physical review E. ISSN 2470-0045. 2021, vol. 104, iss. 1, art. no. 014203, p. 1-12.
  36. Razinkovas, Lukas; Doherty, Marcus W.; Manson, Neil B.; Van de Walle, Chris G.; Alkauskas, Audrius.  Vibrational and vibronic structure of isolated point defects: The nitrogen-vacancy center in diamond . Physical review B.  ISSN 2469-9950. 2021, vol. 104, iss. 4, art. no. 045303, p. 1-19.
  37. Turiansky, Mark E.; Alkauskas, Audrius; Engel, Manuel; Kresse, Georg; Wickramaratne, Darshana; Shen, Jimmy-Xuan; Dreyer, Cyrus E.; Van de Walle, Chris G.  Nonrad: Computing nonradiative capture coefficients from first principles. Computer physics communications. ISSN 0010-4655. 2021, vol. 267, art. no. 108056, p. 1-7.
  38. Baltrukonis, Justas; Ulčinas, Orestas; Orlovas, Sergejus; Jukna, Vytautas. High-order vector Bessel-Gauss beams for laser micromachining of transparent materials. Physical review applied. ISSN 2331-7019. 2021, vol. 16, no. 3, art. no. 034001, p. 1-6.
  39. Leščinskaitė, Alina; Stonkutė, Rima; Vansevičius, Vladas. AGB and RGB stars in the dwarf irregular galaxy Leo A. Astronomy and astrophysics. ISSN 0004-6361. 2021, vol. 647, art. no. A170, p. 1-16.
  40. Pyragas, Viktoras; Pyragas, Kęstutis. Dynamics of a network of quadratic integrate-and-fire neurons with bimodal heterogeneity. Physics letters A. ISSN 0375-9601. 2021, vol.416, art. no. 127677, p. 1-7.
  41. Ratas, Irmantas; Pyragas, Kęstutis; Tass, Peter A. Multistability in a star network of Kuramoto-type oscillators with synaptic plasticity. Scientific reports. ISSN 2045-2322. 2021, vol. 11, art.no. 9840, p. 1-15.
  42. Orlovas, Sergejus; Berškys, Justas. Generalized Lorenz–Mie theory of photonic wheels. Journal of quantitative spectroscopy & radiative transfer. ISSN 0022-4073. 2021, vol. 261, art. no. 107490, p. 1-9.
  43. Ardaravičius, Linas; Kiprijanovič, Oleg; Alsalman, Hussain; Young Kwak, Joon. Self-heating controlled current–voltage and noise characteristics in graphene. Journal of physics D: Applied physics. ISSN 0022-3727. 2021, vol. 54, iss. 18, art. no. 185101, p. 1-8.
  44. Zhang, Yaxin; Liang, Wenfeng; Esposito, Ciro; Jin, Xiaodi; Sakalas, Paulius; Schröter, Michael. LO chain (×12) integrated 190-GHz low-power SiGe receiver with 49-dB conversion gain and 171-mW DC power consumption. IEEE transactions on microwave theory and techniques. ISSN 0018-9480. 2021, vol. 69, iss. 3, p. 1943-1954.
  45. Kiprijanovič, Oleg; Ardaravičius, Linas; Kwak, Joon Young. High-voltage carrier transport measurements in graphene and MoS2. Results in physics. ISSN 2211-3797. 2021, vol. 24, art. no. 104156, p. 1-4.
  46. Ding, Kai; Avrutin, Vitaliy; Izyumskaya, Natalia; Özgür, Ümit; Morkoç, Hadis; Šermukšnis, Emilis; Matulionis, Arvydas. High-performance BeMgZnO/ZnO heterostructure field-effect transistors. Physica status solidi - rapid research letters. ISSN 1862-6254. 2020, vol. 14, iss. 12, art. no. 2000371, p. 1-5.
  47. Jorudas, Justinas; Šimukovič, Artūr; Dub, Maksym; Sakowicz, Maciej; Prystawko, Paweł; Indrišiūnas, Simonas; Kovalevskij, Vitalij; Rumyantsev, Sergey; Knap, Wojciech; Kašalynas, Irmantas. AlGaN/GaN on SiC devices without a GaN buffer layer: electrical and noise characteristics. Micromachines. ISSN 2072-666X. 2020, vol. 11, iss. 12, art. no. 1131, p. 1-13.
  48. Bialopetravičius, Jonas; Narbutis, Donatas. Study of star clusters in the M83 galaxy with a convolutional neural network. The astronomical journal. ISSN 0004-6256. 2020, vol. 160, no. 6, art. no. 264, p. 1-11.
  49. Orlovas, Sergejus; Berškys, Justas. Vector-spherical-harmonics representation of vector complex source beams carrying vortices. Physical review A. ISSN 2469-9926. 2020, vol. 102, iss. 6, art. no. 063532, p. 1-10.
  50. Zhang, Yaxin; Liang, Wenfeng; Jin, Xiaodi; Krattenmacher, Mario; Falk, Sophia; Sakalas, Paulius; Heinemann, Bernd; Schröter, Michael. 3.2-mW ultra-low-power 173–207-GHz amplifier with 130-nm SiGe HBTs operating in saturation. IEEE journal of solid-state circuits. ISSN 0018-9200. 2020, vol. 55, iss. 6, p. 1471-1481.
  51. Orlovas, Sergejus; Berškys, Justas. Generalized Lorenz–Mie theory of photonic wheels. Journal of quantitative spectroscopy & radiative transfer. ISSN 0022-4073. 2021, vol. 261, art. no. 107490, p. 1-9.
  52. Bialopetravičius, Jonas; Narbutis, Donatas. Deriving star cluster parameters with convolutional neural networks. II. Extinction and cluster-background classification. Astronomy & astrophysics. ISSN 0004-6361. 2020, vol. 633, art. no. A148, p. 1-17.
  53. Skuja, Linards; Smits, Krisjanis; Trukhin, Anatoly; Gahbauer, Florian; Ferber, Ruvin; Auzinsh, Marcis; Busaite, Laima; Razinkovas, Lukas; Mackoit-Sinkevičienė, Mažena; Alkauskas, Audrius. Dynamics of singlet oxygen molecule trapped in silica glass studied by luminescence polarization anisotropy and density functional theory. The journal of physical chemistry C. ISSN 1932-7447. 2020, vol. 124, iss. 13, p. 7244-7253.
  54. Turiansky, M. E.; Alkauskas, Audrius; Van de Walle, C. G. Spinning up quantum defects in 2D materials. Nature materials. ISSN 1476-1122. 2020, vol. 19, iss. 5, p. 487-489.
  55. Seliuta, Dalius; Vyšniauskas, Juozas; Ikamas, Kęstutis; Lisauskas, Alvydas; Kašalynas, Irmantas; Reklaitis, Antanas; Valušis, Gintaras. Symmetric bow-tie diode for terahertz detection based on transverse hot-carrier transport. Journal of Physics D: Applied Physics. ISSN 0022-3727. 2020, vol. 53, iss. 27, art. no. 275106, p. 1-7.
  56. Pyragas, Viktoras; Pyragas, Kęstutis. Using reservoir computer to predict and prevent extreme events. Physics letters A. ISSN 0375-9601. 2020, vol. 384, iss. 24, art. no 126591, p. 1-9.
  57. Baltrukonis, Justas; Ulčinas, Orestas; Orlovas, Sergejus; Jukna, Vytautas. Void and micro-crack generation in transparent materials with high-energy first-order vector Bessel beam. Journal of the Optical Society of America B. ISSN 0740-3224. 2020, vol. 37, iss. 7, p. 2121-2127.
  58. Pyragas, Kęstutis; Fedaravičius, Augustinas Povilas; Pyragienė, Tatjana. Entrainment of a network of interacting neurons with minimum stimulating charge. Physical review E. ISSN 2470-0045. 2020, vol.102, iss. 1, art. no. 012221, p. 1-10.
  59. Dreyer, Cyrus E.; Alkauskas, Audrius; Lyons, John L.; Van de Walle, Chris G. Radiative capture rates at deep defects from electronic structure calculations. Physical Review B. ISSN 2469-9950. 2020, vol. 102, iss. 8, art. no. 085305, p. 1-6.
  60. Kiprijanovič, Oleg; Ardaravičius, Linas; Gradauskas, Jonas; Šimkevičius, Česlovas; Keršulis, Skirmantas; Ašmontas, Steponas. S-N border instability, magnetic flux trapping and cumulative effect during pulsed S-N switching of high quality YBaCuO thin films. Superconductor science and technology. ISSN 0953-2048. 2020, vol. 33, no. 9, art. no. 095013, p. 1-8.
  61. Ramonas, Mindaugas; Liberis, Juozapas; Šimukovič, Artūr; Šermukšnis, Emilis; Matulionis, Arvydas; Avrutin, V.; Özgür, Ü.; Morkoç, H. Terahertz oscillations in gallium nitride quantum-well channels predicted by hot-electron noise temperature behavior at microwave frequency. Journal of applied physics. ISSN 0021-8979. 2020, vol. 128, iss. 5, art. no. 055702, p. 1-11.
  62. Marsden, Christopher; Shankar, Francesco; Ginolfi, Mitchele; Zubovas, Kastytis. The case for the fundamental MBH-σ relation. Frontiers in physics. ISSN 2296-424X. 2020, vol. 8, art. no. 61, p. 1-13.
  63. Tartėnas, Matas; Zubovas, Kastytis. Feeding of active galactic nuclei by dynamical perturbations. Monthly notices of the Royal Astronomical Society. ISSN 0035-8711. 2020, vol. 492, iss. 1, p. 603-614.
  64. Ledinauskas, Eimantas; Zubovas, Kastytis. Evolution of dwarf galaxy observable parameters. Monthly notices of the Royal Astronomical Society. ISSN 0035-8711. 2020, vol. 493, iss. 1, p. 638-650.
  65. Zubovas, Kastytis; Nardini, Emanuele. Intermittent AGN episodes drive outflows with a large spread of observable loading factors. Monthly notices of the Royal Astronomical Society. ISSN 0035-8711. 2020, vol. 498, iss. 3, p. 3633-3647.
  66. Orlovas, Sergejus; Huber, Christian; Marchenko, Pavel; Banzer, Peter; Leuchs, Gerd. Towards a corrected knife-edge-based reconstruction of tightly focused higher order beams. Frontiers in physics. ISSN 2296-424X. 2020, vol. 8, art. no. 527734, p. 1-10.
  67. Bialopetravičius, Jonas; Narbutis, Donatas; Vansevičius, Vladas. Deriving star cluster parameters with convolutional neural networks. I. Age, mass, and size. Astronomy & astrophysics. ISSN 0004-6361. 2019, vol. 621, art. no. A103, p. 1-10.
  68. Indrišiūnas, Simonas; Richter, Heiko; Grigelionis, Ignas; Janonis, Vytautas; Minkevičius, Linas; Valušis, Gintaras; Račiukaitis, Gediminas; Hagelschuer, Till; Hübers, Heinz-Wilhelm; Kašalynas, Irmantas. Laser-processed diffractive lenses for the frequency range of 4.7 THz. Optics letters. ISSN 0146-9592. 2019, vol. 44, no. 5, p. 1210-1213.
  69. Pyragas, Viktoras; Pyragas, Kęstutis. State-dependent act-and-wait time-delayed feedback control algorithm. Communications in nonlinear science and numerical simulation. ISSN 1007-5704. 2019, vol. 73, p. 338-350.
  70. Wickramaratne, Darshana; Shen, Jimmy-Xuan; Dreyer, Cyrus E.; Alkauskas, Audrius; Van de Walle, Chris G. Electrical and optical properties of iron in GaN, AlN, and InN. Physical review B. ISSN 2469-9950. 2019, vol. 99, iss. 20, art. no. 205202, p. 1-13.
  71. Frodason, Y. K.; Johansen, K. M.; Alkauskas, Audrius; Vines, L. Negative-U and polaronic behavior of the Zn-O divacancy in ZnO. Physical review B. ISSN 2469-9950. 2019, vol. 99, iss. 17, art. no. 174106, p. 1-7.
  72. Bauer, Thomas; Banzer, Peter; Bouchard, Frédéric; Orlovas, Sergejus; Marrucci, Lorenzo; Santamato, Enrico; Boyd, Robert W; Karimi, Ebrahim; Leuchs, Gerd. Multi-twist polarization ribbon topologies in highly-confined optical fields. New journal of physics. ISSN 1367-2630. 2019, vol. 21, art. no. 053020, p. 1-7.
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