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Belyaev, B. A.
Impedance spectra of thin permalloy films with a nanoisland structure / B. A. Belyaev, N. A. Drokin // Phys. Solid State. - 2012. - Vol. 54, Is. 2. - P. 360-367, DOI 10.1134/S1063783412020084. - Cited References: 20. - This study was supported by the Russian Federal Targeted Program "Scientific and Scientific-Pedagogical Human Resources for the Innovative Russia in 2009-2013," the Siberian Branch of the Russian Academy of Sciences (Integration research project no. 5), and the Presidium of the Russian Academy of Sciences (project no. 21.1). . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
CAPACITANCE
Аннотация: The behavior of the impedance spectra of island permalloy films prepared through vacuum evaporation onto optically polished glass-ceramic substrates has been investigated in the frequency range from 0.0001 to 100 MHz. A resistor-capacitor model of the films has been developed and the model parameters, for which there is a good agreement with experimental data on the frequency dependences of the real and imaginary components of the impedance, have been determined. The specific features in the behavior of the electrical and physical characteristics with variations in the thickness of the sample and the gap between the measuring electrodes have been investigated. It has been found that the relative permittivity of the films under investigation reaches values E similar to 10(7)-10(8). The structural relaxation times have been calculated.

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Публикация на русском языке Беляев, Борис Афанасьевич. Спектры импеданса тонких пермаллоевых пленок с наноостровковой структурой [Текст] / Б. А. Беляев, Н. А. Дрокин // Физ. тверд. тела : Физико-технический институт им. А.Ф.Иоффе РАН, 2012. - Т. 54 Вып. 2. - С. 340-346

Держатели документа:
[Belyaev, B. A.
Drokin, N. A.] Russian Acad Sci, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Belyaev, B. A.] Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia

Доп.точки доступа:
Drokin, N. A.; Дрокин, Николай Александрович; Беляев, Борис Афанасьевич
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Wigner function description of ac transport through a two-dimensional quantum point contact / I. E. Aronov [et al.] // J. Phys.: Condens. Matter. - 1997. - Vol. 9, Is. 24. - P. 5089-5103, DOI 10.1088/0953-8984/9/24/009. - Cited References: 45 . - ISSN 0953-8984

РУБ Physics, Condensed Matter
Рубрики:
QUANTIZED CONDUCTANCE
   BALLISTIC-RESISTANCE
   CONSTRICTION
   CAPACITANCE
   ADMITTANCE
   ELECTRONS
   SYSTEMS
   FIELD
   PUMP
Аннотация: We have calculated the admittance of a two-dimensional quantum point contact (QPC) using a novel variant of the Wigner distribution function (WDF) formalism. In the semiclassical approximation, a Boltzmann-like equation is derived for the partial WDF describing both propagating and non-propagating electron modes in an effective potential generated by the adiabatic QPC. We show that this quantum kinetic approach leads to the well known stepwise behaviour of the real part of the admittance (the conductance), and of the imaginary part of the admittance (the emittance), in agreement with the latest results derived by Christen and Buttiker, which is determined by the number of propagating electron modes. It is shown that the emittance is sensitive to the geometry of the QPC, and can be controlled by the gate voltage. We have established that the emittance has contributions corresponding to both quantum inductance and quantum capacitance. Stepwise oscillations in the quantum inductance are determined by the harmonic mean of the velocities for the propagating modes, whereas the quantum capacitance is a significant mesoscopic manifestation of the nonpropagating (reflecting) modes.

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Держатели документа:
LOS ALAMOS NATL LAB,CNLS,LOS ALAMOS,NM 87545
UKRAINIAN ACAD SCI,INST RADIOPHYS & ELECT,UA-310085 KHARKOV,UKRAINE
LV KIRENSKII INST PHYS,KRASNOYARSK 660036,RUSSIA
UNIV ILLINOIS,DEPT PHYS,URBANA,IL 61801
ИФ СО РАН
Theoretical Division, CNLS, Los Alamos National Laboratory, Los Alamos, NM 87545, United States
Inst. Radiophysics and Electronics, Natl. Academy of Sciences of Ukraine, 12 Acad Proskura Street, 310085, Kharkov, Ukraine
Kirensky Institute of Physics, 660036, Krasnoyarsk, Russian Federation
Department of Physics, Univ. Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, IL 61801-3080, United States

Доп.точки доступа:
Aronov, I. E.; Berman, G. P.; Campbell, D. K.; Dudiy, S. V.
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