Temperature-dependent nonlinear Hall effect in macroscopic Si-MOS antidot array
Physical Review B: Condensed Matter and Materials Physics. 2016. Vol. 93. P. 205407.
Kuntsevich A., Shupletsov A. V., Nunuparov M. S.
By measuring magnetoresistance and the Hall effect in a classically moderate perpendicular magnetic field in a Si-MOSFET-type macroscopic antidot array, we found a nonlinear with field, temperature- and density-dependent Hall resistivity. We argue that this nonlinearity originates from low mobility shells of the antidots with a strong temperature dependence of the resistivity and suggest a qualitative explanation of the phenomenon.
Research target: Physics
Priority areas: mathematics
Electron-electron interaction correction and magnetoresistance in tilted fields in Si-based two-dimensional systems
, , , Physical Review B: Condensed Matter and Materials Physics 2013 Vol. 87 P. 205406
We study the diffusive electron-electron interaction correction to conductivity by analyzing simultaneously ρxx and ρxy for disordered 2D electron systems in Si in a tilted magnetic field. Tilting the field is shown to be a straightforward tool to disentangle spin and orbital effects. In particular, by changing the tilt angle we prove experimentally that in ...
Added: October 15, 2016
, , et al., Physical Review Letters 2012 Vol. 109 P. 226403
We report thermodynamic magnetization measurements of two-dimensional electrons in several highmobility Si metal-oxide-semiconductor field-effect transistors. We provide evidence for an easily polarizable electron state in a wide density range from insulating to deep into the metallic phase. The temperature and magnetic field dependence of the magnetization is consistent with the formation of large-spin droplets in the insulating phase. These ...
Added: October 15, 2016
, , et al., Письма в Журнал экспериментальной и теоретической физики 2016 Т. 104 № 9 С. 651-657
В работе исследовалась магнетопроводимость тонких пленок Bi2Se3 с защитным слоем Se, выра щенных на подложках (111) BaF2. Наблюдаемая отрицательная магнетопроводимость в малых полях, обусловленная эффектом слабой антилокализации, так же как и осцилляции Шубникова–де Гааза в больших полях, определяется только перпендикулярной к плоскости пленки компонентой магнитного поля. Полученные экспериментальные результаты могут быть разумно объяснены в предположении на личия в исследуемых пленках ...
Added: December 6, 2016
, , et al., Physical Review Letters 2015 Vol. 115 No. 25 P. 256601-1-256601-6
Separating between the ordinary Hall effect and anomalous Hall effect in the paramagnetic phase of Mn1−xFexSi reveals an ordinary Hall effect sign inversion associated with the hidden quantum critical (QC) point x ∼ 0.11. The effective hole doping at intermediate Fe content leads to verifiable predictions in the field of fermiology, magnetic interactions, and QC ...
Added: February 25, 2017
, , et al., Journal of Physics: Conference Series 2018 Vol. 941 P. 1-4
We report preparation of nanoribbons (crossection ~ 250*25 nm2) by focused ion beam etching of single-crystalline Bi2Se3 and detailed measurements of their magnetoresistance at temperatures down to 4.2 K, magnetic field up to 9 T. In a magnetic field parallel to the axis of nanowire the magnetoresistance shows up oscillations. Surprisingly, the Fourier analysis shows ...
Added: February 25, 2018
Temperature derivative of the chemical potential and its magnetooscillations in two-dimensional system
, , et al., JETP Letters 2015 Vol. 101 No. 2 P. 125-129
We report the first thermodynamic measurements of the temperature derivative of chemical potential (∂μ/∂T) in two-dimensional (2D) electron systems. In order to test the technique, we have chosen Schottky gated GaAs/AlGaAs heterojunctions and detected experimentally in this 2D system quantum magneto-oscillations of ∂μ/∂T. We also present a Lifshits-Kosevitch type theory for the ∂μ/∂T magneto-oscillations in ...
Added: October 15, 2016
C2H2···CO complex and its radiation-induced transformations: a building block for cold synthetic astrochemistry
, , et al., Monthly Notices of the Royal Astronomical Society 2021 Vol. 506 No. 3 P. 3499-3510
In this work, we have examined the radiation-induced synthetic chemistry occurring in an astrochemically important C2H2–CO system at the molecular level using a matrix isolation approach. The 1:1 C2H2···CO intermolecular complex of linear structure was obtained in the solid low-temperature (5 K) noble gas matrices by deposition of the C2H2/CO/Ng (Ng = Ar, Kr, Xe) gaseous mixtures and ...
Added: November 16, 2021
Тезисы докладов 38 Совещания по физике низких температур (НТ-38) 17-22 сентября 2018 г., г. Москва - г. Ростов-на-Дону – пос. Шепси
Ростов н/Д : Издательство Фонд науки и образования, 2018
The collection presents abstracts included in the program "38 Meetings on low temperature physics". The sequence of abstracts corresponds to the sequence in which the reports are placed in the program of the Meeting. ...
Added: October 31, 2019
, Journal of Physics: Conference Series 2017 Vol. 804 No. 012036 P. 1-8
We investigate the existence and the orthogonality of the generalized Jack symmetric functions which play an important role in the AGT relations. We show their orthogonality by deforming them to the generalized Macdonald symmetric functions. ...
Added: October 26, 2017
, , et al., Physical Review B: Condensed Matter and Materials Physics 2016 Vol. 93 P. 063845
Superconducting circuits provide a new platform for study of nonstationary cavity QED phenomena. An example of such a phenomenon is the dynamical Lamb effect, which is the parametric excitation of an atom due to nonadiabatic modulation of its Lamb shift. This effect was initially introduced for a natural atom in a varying cavity, while we ...
Added: October 18, 2016
, , , Journal of Geometry and Physics 2011 Vol. 61 P. 1203-1222
We present a summary of current knowledge about the AGT relations for conformal blocks with additional insertion of the simplest degenerate operator, and a special choice of the corresponding intermediate dimension, when the conformal blocks satisfy hypergeometric-type differential equations in position of the degenerate operator. A special attention is devoted to representation of conformal block ...
Added: February 28, 2013
Control of the exciton valley dynamics in atomically thin semiconductors by tailoring the environment
, , et al., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 103 No. 8 P. 085302-1-085302-12
The exciton valley dynamics in van der Waals heterostructures with transition metal dichalcogenide monolayers is driven by the long-range exchange interaction between the electron and the hole in the exciton. It couples the states active in the opposite circular polarizations resulting in the longitudinal-transverse splitting of excitons propagating in the monolayer plane. Here we study ...
Added: March 5, 2021
Nonlinear wave run-up in bays of arbitrary cross-section: generalization of the Carrier-Greenspan approach
, , , Journal of Fluid Mechanics 2014 Vol. 748 P. 416-432
We present an exact analytical solution of the nonlinear shallow water theory for wave run-up in inclined channels of arbitrary cross-section, which generalizes previous studies on wave run-up for a plane beach and channels of parabolic cross-section. The solution is found using a hodograph-type transform, which extends the well-known Carrier–Greenspan transform for wave run-up on ...
Added: November 19, 2014
, , Physical Review B: Condensed Matter and Materials Physics 2013 Vol. 88 No. 5 P. 054505-1-054505-10
We investigate the effect of interacting quantum phase slips on persistent current and its fluctuations in ultrathin superconducting nanowires and nanorings pierced by the external magnetic flux. We derive the effective action for these systems and map the original problem onto an effective sine-Gordon theory on torus. We evaluate both the flux dependent persistent current ...
Added: February 9, 2015
Account of occasional wave breaking in numerical simulations of irregular water waves in the focus of the rogue wave problem
, , Water Waves, Springer 2019 P. 1-20
The issue of accounting of the wave breaking phenomenon in direct numerical simulations of oceanic waves is discussed. It is emphasized that this problem is crucial for the deterministic description of waves, and also for the dynamical calculation of extreme wave statistical characteristics, such as rogue wave height probability, asymmetry, etc. The conditions for accurate ...
Added: October 13, 2019
Temperature distribution in driven granular mixtures does not depend on mechanism of energy dissipation
, , , Scientific Reports 2020 Vol. 10 Article 693
We study analytically and numerically the distribution of granular temperatures in granular mixtures for different dissipation mechanisms of inelastic inter-particle collisions. Both driven and force-free systems are analyzed. We demonstrate that the simplified model of a constant restitution coefficient fails to predict even qualitatively a granular temperature distribution in a homogeneous cooling state. At the same time we reveal ...
Added: February 25, 2020
, , , Journal of High Energy Physics 2012 Vol. 1210
The reduction of the duality invariant approach to M-theory by a U-duality group valued Scherk-Schwarz twist is considered. We show that all gaugings of SUGRA can be obtained by dimensional reduction of the extended space. ...
Added: October 20, 2014
, , Physical Review D - Particles, Fields, Gravitation and Cosmology 2010 Vol. 81 P. 085010
We show that Polchinski equations in the D-dimensional matrix scalar field theory can be reduced at large N to the Hamiltonian equations in a (D+1)-dimensional theory. In the subsector of the Trϕl (for all l) operators we find the exact form of the corresponding Hamiltonian. The relation to the holographic renormalization group is discussed. ...
Added: February 27, 2013
М. : ИКИ РАН, 2011
Added: March 26, 2013
, , et al., Известия высших учебных заведений. Электроника 2015 Т. 20 № 6 С. 576-581
The galvanomagnetic Van der Pau measurements were carried out on monocrystalline CdXHg1-XTe (MCT) samples and epitaxial CdXHg1-XTe/Cd1-YZnYTe (MCT/CZT) heterostructures (X 0,2) at T = 295 K and T = 77 K. The sample along with the cryostat rotated in magnetic field of electromagnet by (0 - 3600) – angle with 6-degree step. Angular dependencies ...
Added: May 14, 2015
, , et al., Теоретическая и математическая физика 2019 Т. 200 № 2 С. 290-309
Leading logarithms in massless nonrenormalizable effective field theories can be computed using nonlinear recurrence relations. These recurrence relations follow from the fundamental requirements of unitarity, analyticity, and crossing symmetry of scattering amplitudes and generalize the renormalization group technique to the case of nonrenormalizable effective field theories. We review the existing exact solutions of nonlinear recurrence relations relevant for field ...
Added: September 29, 2020
, , Polymer Science - Series C 2018 Vol. 60 No. Supplement 1 P. 148-159
Theoretical models of the conformational behavior of flexible polymer chains in mixed solvents enunciated in the world literature during the last decade are critically reviewed. Models describing different mechanisms of coil-to-globule transitions in a good solvent induced by cosolvent addition are highlighted. Special attention is given to the analysis of theoretical approaches to describing the ...
Added: November 30, 2018
, , Scientific Reports 2018 Vol. 8 No. 1 P. 16915-1-16915-18
Sequential state discrimination is a strategy for quantum state discrimination of a sender’s quantum states when N receivers are separately located. In this report, we propose optical designs that can perform sequential state discrimination of two coherent states. For this purpose, we consider not only binary phase-shifting-key (BPSK) signals but also general coherent states, with arbitrary prior probabilities. Since ...
Added: November 16, 2020
, , et al., Труды НГТУ им. Р.Е. Алексеева 2012 № 2(95) С. 48-65
Purpose: Numerical modeling of internal baroclinic disturbances of different shapes in a model lake with variable depth, analysis of velocity field of wave-induced current, especially in the near-bed layer. Approach: The study is carried out with the use of numerical full nonlinear nonhydrostatic model for stratified fluid. Findings: The full nonlinear numerical modeling of internal wave dynamics ...
Added: October 6, 2012