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The big picture goal of this group is to investigate conducting properties of condensed materials, mainly focusing on low-dimensional electron systems: quantum dots, quantum wells and thin films. One of the main recent developments of Sergey Vitkalov and his collaborators is the concept of quantal heating of the two-dimensional electrons by dc electric current in quantizing magnetic fields, though the phenomenon may occur in any system with a quantized energy spectrum. This effect stands distinctly apart from traditional Joule heating and is absent in classical electron systems. In quantal heating regime the energy losses are significantly reduced.
Recent News:
2023
March 31-April 1, 2023
Invited talk "Quantum lifetime of 2D electrons in magnetic fields" at conference on "Mesoscopic physics and superconducting quantum circuits" at Rutgers University, US.
2022
December 15, 2022
Publication of our manuscript in Journal of Applied Physics.
Effect of electron–electron interaction on magnitude of quantum oscillations of dissipative resistance in magnetic fields; Sara Abedi, Sergey Vitkalov, A. A. Bykov, and A. K. Bakarov, J. Appl. Phys. 132, 234302 (2022); doi: 10.1063/5.0127286
October 13, 2022
Publication of our manuscript in Symmetry.
Superconductivity in Hierarchical 3D Nanostructured Pb–In Alloys; A.F. Shevchun, G.K. Strukova, I.M. Shmyt’ko, G.V. Strukov, S.A. Vitkalov, D.S. Yakovlev, ; I.A. Nazhestkin, D.V. Shovkun, Symmetry 2022, 14, 2142. https://doi.org/10.3390/sym14102142
August 30, 2022
Sara Abedi defended her thesis. Congratulation Sara!
2021
December 15, 2021
Publication of our manuscript in JETP Letters.
Suppression of Magneto-Intersubband Resistance Oscillations by Large-Scale Fluctuations of the Intersubband Energy Splitting; A. A. Bykov, D. V. Nomokonov, A. V. Goran, I. S. Strygin, A. K. Bakarov, S. Abedi, and S. A. Vitkalov; JETP LETTERS Vol. 114 No. 7, p.423 (2021).
August 10, 2021
Publication of our manuscript in Physical Review B.
Temperature damping of magneto-intersubband resistance oscillations in magnetically entangled subbands; S. Abedi, S. A. Vitkalov, A.A. Bykov and A. K. Bakarov; Phys. Rev. B 104, 1075416 (2021)
Invited talk "Temperature damping of MISO in magnetically entangled subbands" at International Workshop TS2DS-2021: "Transport and spectroscopy of Two Dimensional Systems" August 2-August 6 2021, Chernogolovka, Russia.
2020
May 12, 2020
Publication of our manuscript in Scientific Reports.
Anomalous Decay of Quantum Resistance Oscillations of 2D Helical Electrons in Magnetic Field; S. Abedi, S. A. Vitkalov, N. N. Mikhailov & Z. D. Kvon; Sci Rep 10, 7875 (2020). https://doi.org/10.1038/s41598-020-64385-7
Invited talk: "Anomalous Decay of Quantum Resistance Oscillations of 2D Helical Electrons in Magnetic Field" at International workshop "Cool Electrons at Flatlands". Catania (Italy), June 15-24, 2020
2019
October 9, 2019
Publication of our manuscript in JETP Letters.
Microwave-Induced Magneto-Intersubband Scattering in a Square Lattice of Antidots; A. A. Bykov, I. S. Strygin, b, A. V. Goran, E. E. Rodyakina, D. V. Nomokonov, I. V. Marchishin, S. Abedi, and S. A. Vitkalov; JETP LETTERS Vol. 110 No. 10 2019
March 30, 2019
Publication of short article in Advances in nanoscience and nanotechnology.
The Beauty and Mystery of the Micro World; Gennady Strukov, Galina Strukova and Sergey Vitkalov; Advances in Nanoscience and Nanotechnology 3, 1 (2019)
January 22, 2019
Publication of our manuscript in JETP Letters.
Beats of Quantum Oscillations of the Resistance in Two-Subband Electron Systems in Tilted Magnetic Fields; A. A. Bykov, I. S. Strygin, A. V. Goran, I. V. Marchishin, D. V. Nomokonov, A. K. Bakarov, S. Abedi, and S. A. Vitkalov; JETP LETTERS 109, 396 (2019)
2018
June 20, 2018
Publication of our manuscript in JETP Letters.
Zener Tunneling between the Landau Levels in a Two-Dimensional Electron System with One-Dimensional Periodic Modulation; A. A. Bykov, I. S. Strygin, E. E. Rodyakina, and S. A. Vitkalov; JETP LETTERS Vol.108, 121 (2018).
May 24, 2018
Publication of our manuscript in the APS Physical Review B.
Anomalous negative magnetoresistance of two-dimensional electrons; Jesse Kanter, Sergey Vitkalov, A. A. Bykov; PHYSICAL REVIEW B 97, 205440 (2018).
May 22, 2018
Publication of our manuscript in Nano-Structures & Nano-Objects.
Disintegration of nanostructured metals with the formation of nanoparticles in electron microscope; G.K.Strukova, G.V.Strukov, I.I.Khodos, S.A.Vitkalov; Nano-Structures & Nano-Objects, 16, 104 (2018)
2017
July 28, 2017
Publication of our manuscript in the APS Physical Review B.
Quantum electron transport in magnetically entangled subbands; William Mayer, Sergey Vitkalov, and A. A. Bykov; Phys. Rev. B 96, 045436 (2017)
May 26, 2017
Publication of our manuscript in Materials Letters.
Interaction of 3D mesostructures composed of Pd-Ni alloy nanowires with low-temperature oxygen plasma; G.K. Strukova, G.V. Strukov, S.V. Egorov, A.A. Rossolenko, D.V. Matveyev, V.S. Stolyarov, S.A. Vitkalov; Materials Letters 203 (2017) 68–72
2016
November 23, 2016
Publication of our manuscript in the APS Physical Review B.
Positive quantum magnetoresistance in tilted magnetic field; William Mayer, Areg Ghazaryan, Pouyan Ghaemi, Sergey Vitkalov and A. A. Bykov; PHYSICAL REVIEW B 94, 195312 (2016)
August 25th, 2016
Publication of our manuscript in JETP Letters.
Zero differential resistance state of two dimensional electron gas in one dimensional periodic potential at high filling factors; A. A. Bykov, I. S. Strygin, A. V. Goran, E. E. Rodyakina, W. Mayer and S. A. Vitkalov; JETP Letters vol.104, 257 (2016)
June 28th, 2016
Publication of our manuscript in the APS Physical Review B.
Resistance oscillations of two-dimensional electrons in crossed electric and tilted magnetic fields; W. Mayer, S. Vitkalov and A. A. Bykov; Phys. Rev. B 93, 245436
March 17th, 2016
William Mayer(PhD Student) from the microwave lab will give the following talk at the 2016 APS March Meeting in Baltimore, MD:
Magneto-inter-subband oscillations in GaAs quantum wells with three populated subbands placed in tilted magnetic fields; Thursday. March 17th, 11:15am Session S51: Thermodynamic & Transport Properties in Semiconductors
March 14th, 2016
Publication of our manuscript in the APS Physical Review B.
Magnetointersubband resistance oscillations in GaAs quantum wells placed in a tilted magnetic field; W. Mayer, Jesse Kanter, Javad Shabani, Sergey Vitkalov, A. K. Bakarov, and A. A. Bykov; Phys. Rev. B 93, 115309
2015
October 8th, 2015
Publication of our manuscript in the APS Physical Review B.
Quantum electron lifetime in GaAs quantum wells with three populated subbands; Scott Dietrich, Jesse Kanter, W. Mayer, Sergey Vitkalov, D. V. Dmitriev and A. A. Bykov; Phys. Rev. B 92. 155411
July 10th, 2015
William Mayer (PhD student) will be presenting a poster at the upcoming 11th International Conference on Materials and Mechanisms of Superconductivity to be held in Geneva, Switzerland from August 23-28, 2015. Poster Title: Frequency dispersion of nonlinear response of thin superconducting films
June 26th, 2015
The CCNY Microwave Lab has officially moved into the brand new City College Center for Discovery and Innovation located adjacent to the CUNY Advanced Science and Research Center (ASRC). We can now be found at the address listed below.
CCNY Microwave Laboratory
85 St. Nicholas Terrace Room 1251
New York, NY 10027
May 28th, 2015
We proudly to announce the publication of manuscript in the APS Physical Review B.
Dynamics of quantal heating in electron systems with discrete spectra; Scott Dietrich, William Mayer, Sergey Vitkalov, and A. A. Bykov; Phys. Rev. B 91, 205439
May 25th, 2015
We proudly to announce the publication of another manuscript in JETP Letters.
Interference of commensurate and microwave-induced oscillations of the magnetoresistance of a two-dimensional electron gas in a one-dimensional lateral superlattice; A. A. Bykov, A. V. Goran, W. Mayer, and S. A. Vitkalov; JETP Letters, 2015, Vol. 101, No. 10, pp. 703–707
February 20th, 2015
We are proud to announce our latest publication in the APS Physical Review B Rapid Communication in collaboration with SUNY Buffalo and Brookhaven National Laboratory.
Frequency dispersion of nonlinear response of thin superconducting films in the Berezinskii-Kosterlitz-Thouless state; Scott Dietrich, William Mayer, Sean Byrnes, Sergey Vitkalov, A. Sergeev, Anthony T. Bollinger, and Ivan Božović; Phys. Rev. B 91, 060506(R) (2015)
February 19th, 2015
Nanoscience NY; The ASRC will open its doors to the nanoscience community in the New York City metro area to host this free one-day symposium, Nanoscience NY.
Graduate students from the CCNY Microwave Lab will be presenting posters of their research, helping to open up the brand new CUNY Advanced Science Research Center and CCNY Science Facilities.
January, 2015
Graduate students from the microwave lab will be giving the following talks at the upcoming APS March Meeting in San Antonio, TX:
Intersubband Oscillations in GaAs Quantum Wells with Three Populated Subbands
Jesse Kanter; Tuesday, March 3, 2015 at 12:15pm; Session G5: Integer Quantum Hall Effects
Dynamics of Quantal Heating in Electron Systems with Discrete Spectra
William Mayer; Tuesday, March 3, 2015 at 11:51am; Session G5: Integer Quantum Hall Effects
Broadband Coupling of Microwave Signals to Thin Conductors in Cryogenic Systems
Scott Dietrich; Monday, March 2, 2015 at 12:15pm; Session B21: Detectors, Sensors, & Transducers
2014
December, 2014
Scott Dietrich (PhD student) gave an invited talk entitled "Probing the Electron Dynamics Behind Quantal Heating of 2D Electrons" at the Physics Department of Clark University in Worcester, MA on December 10th.
Scott also was awarded the FGSA Travel Award for Excellence in Graduate Research in order to attend the APS March Meeting. The award comes from the Forum on Graduate Student Affairs, a division of APS dedicated to the professional development of graduate students in the field of physics.
October, 2014
Here is an advanced e-print of our latest publication:
Dynamics of Quantal Heating in Electron Systems with Discrete Spectra; Scott Dietrich, William Mayer, Sergey Vitkalov, and A. A. Bykov; Available at arXiv.org.
August, 2014
PhD student, Scott Dietrich, gave a talk entitled "Dynamics of Quantal Heating of 2D Electrons in Crossed Electric and Quantizing Magnetic Fields" at the 32nd International Conference on the Physics of Semiconductors in Austin, TX.
March, 2014
Two PhD students from our group contributed three talks and one poster to the APS March Meeting in Denver, CO.
"Frequency dispersion of nonlinear response of thin superconducting films" - Scott Dietrich (Talk)
"Nonlinear magneto-transport in two dimensional electron system with anisotropic mobility" - William Mayer (Talk)
"I-V characteristics of atomically thin superconducting La2−xSrxCuO films" - Scott Dietrich (Talk)
"Bolometric calibration of microwave power in low temperature systems" (Poster)
Research Supported by:
City University of New York Research Office
City College of New York Division of Science
85 St. Nicholas Terrace Room 1251
New York, NY 10027
ccnymw@gmail.com