Магнетотранспорт в тонких эпитаксиальных пленках Bi2Se3
JETP Letters. 2016. Т. 104. № 9. С. 651-657.
Овешников Л. Н., Нехаева Е. И., Прудкогляд В. А., Kuntsevich A., Селиванов Ю. Г., Чижевский Е. Г., Аронзон Б. А.
Research target: Physics
Priority areas: engineering science
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., 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
, , , Physical Review B: Condensed Matter and Materials Physics 2016 Vol. 93 P. 205407
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 ...
Added: October 15, 2016
, , , Physical Review B: Condensed Matter and Materials Physics 2018 Vol. 97 P. 195431-1-195431-8
The phase of quantum magneto-oscillations is often associated with the Berry phase and is widely used to argue in favor of topological nontriviality of the system (Berry phase 2πn + π). Nevertheless, the experimentally determined value may deviate from 2πn + π arbitrarily, therefore more care should be made analyzing the phase of magneto-oscillations to distinguish trivial systems ...
Added: September 10, 2018
, , et al., Scripta Materialia 2021 Vol. 194
We have studied the solid state dewetting of ten monolayer sthick Ag film deposited on periodicall ypatterned Si(557) surface. The annealing of the system in the ultra-high vacuum at the temperatures between 300 and 400°C resulted in full agglomeration of the film and formation of faceted single crystalline Ag nanoparticles exhibiting bimodal size distribution.We demonstrated ...
Added: December 10, 2020
, , et al., Физика твердого тела 2020 Т. 62 № 9 С. 1375-1378
At ultra-low temperatures, the transport properties of two types of quasi-one-dimensional superconducting microstructures were studied: thin channels tightly packed in the form of a meander, and chains of superconductor-insulator-superconductor tunnel contacts. Both types of microstructures demonstrated high values of high-frequency impedance and / or dynamic resistance. The study opens up the possibility of using such ...
Added: July 21, 2020
, , , Известия Уфимского научного центра РАН 2021 № 1 С. 106-110
This research was performed using thin superconducting strips in the shape of tightly packed meanders made of niobium nitride (NbN) ultrathin superconducting strips about 100 nm wide, 5 nm thick and up to 100 μm long. The structures revealed the effect of high kinetic inductance at temperatures lower than the critical temperature. Consideration was given to the temperature ...
Added: May 27, 2021
Injection Modification of Multilayer Dielectric Layers of Metal - Oxide - Semiconductor Structures at Different Temperatures
, , et al., Inorganic Materials: Applied Research 2014 Vol. 5 No. 2 P. 129-132
The charge state change of MOS structures with multilayer dielectric films SiO2–PSG under highfield injection modification at different temperatures is studied in this article. The effect of temperature on the thermal stability of the negative charge component used to adjust the threshold voltage of MOS transistors is investigated. It is found that the performance of ...
Added: August 4, 2014
Suppression of indirect exchange and symmetry breaking in the antiferromagnetic metal HoB12 with dynamic charge stripes
, , et al., Physical Review B: Condensed Matter and Materials Physics 2020 Vol. 102 No. 21 P. 1-6
Precise angle-resolved magnetoresistance (ARM) measurements are applied to reveal the origin of symmetry lowering in electron transport and the emergence of a huge number of magnetic phases in the ground state of the antiferromagnetic metal HoB12 with fcc crystal structure. By analyzing the polar H-θ-ϕ magnetic phase diagrams of this compound reconstructed from the experimental ARM data, we ...
Added: February 1, 2021
, Physical Review B: Condensed Matter and Materials Physics 2019 Vol. 100 P. 035301-1-035301-7
A nonstationary anomalous Hall current is calculated for a voltage biased Josephson junction, which is composed of two s-wave superconducting contacts deposited on the top of a three-dimensional topological insulator (TI). A homogeneous Zeeman field was assumed at the surface of the TI. The problem has been considered within the ballistic approximation and on the ...
Added: March 11, 2020
Тезисы докладов Всероссийского совещания по использованию рассеяния нейтронов и синхротронного излучения в конденсированных средах (РНСИ-КС-2014)
СПб. : ФГБУ "ПИЯФ" НИЦ "Курчатовский институт", 2014
This edition presents abstracts of the reports of the Meeting and Youth Conference on Neutron Scattering and Synchrotron Radiationin Condensed Matte (NSSR-CM-2014)r ...
Added: March 11, 2015
, , et al., Кристаллография 2015 Т. 60 № 64 С. 630-633
We report the results of comparative study of the structure of tellurium films obtained by crystallization from the gas phase on substrates of sapphire single crystals and mica (Muscovite). ...
Added: March 12, 2015
Структурные и диэлектрические свойства кристаллов и пленок органического сегнетоэлектрика 2-метилбензимидазола
, , et al., Поверхность. Рентгеновские, синхротронные и нейтронные исследования 2018 № 3 С. 52-58
Single crystals and films of 2-methylbenzimidazole were obtained by evaporation from an alcohol solution. Films are a texture with a predominant orientation of the pseudo-tetragonal axis in the film plane. The blocks are split spherulite-type crystals in which the pseudotetragonal axis rotates around the center of the block. Dielectric hysteresis loops in the temperature range ...
Added: November 10, 2020
Berry phase mechanism of the anomalous Hall effect in a disordered two-dimensional magnetic semiconductor structure
, , et al., Scientific Reports 2015 Vol. 5 P. 17158-1-17158-9
The anomalous Hall effect (AHE) arises from the interplay of spin-orbit interactions and ferromagnetic order and is a potentially useful probe of electron spin polarization, especially in nanoscale systems where direct measurement is not feasible. While AHE is rather well-understood in metallic ferromagnets, much less is known about the relevance of different physical mechanisms governing AHE ...
Added: March 13, 2016
, , et al., Journal of Magnetism and Magnetic Materials 2018 Vol. 459 No. 1 P. 331-334
Structural, magnetic and magnetotransport properties of (Bi1-xEux)2Se3 thin films have been studied experimentally as a function of Eu content. The films were synthesized by MBE. It is demonstrated that Eu distribution is not uniform, it enter quint-layers forming inside them plain (pancake-like) areas containing Eu atoms, which sizes and concentration increase with the growth of Eu content. Positive ...
Added: July 13, 2018
, , , Solid state Technology 1999 Vol. 42 No. 5 P. 53-58
Added: March 22, 2013
, , et al., Applied Magnetic Resonance 2020 Vol. 51 No. 1 P. 71-84
The low temperature (T < 5 K) electron spin resonance in topological Kondo insulator SmB6 is investigated. It is shown that spin relaxation time of the paramagnetic centers responsible for low temperature electron spin resonance in SmB6 is about ~ 10−8 s, which exceeds by five orders of magnitude the widely accepted spin and charge fluctuation time ~ 10−13 s in the homogeneous ...
Added: December 24, 2020
, Materials 2022 Vol. 14 No. 24 P. 7528-7528
Search for doped superconducting topological insulators is of prime importance for new quantum technologies. We report on fabrication of Sr-doped Bi2Te3 single crystals. We found that Bridgman grown samples have p-type conductivity in the low 10^19 cm^(−3), high mobility of 4000 cm^2*V^(−1)s^(−1), crystal structure independent on nominal dopant content, and no signs of superconductivity. We also studied molecular ...
Added: June 17, 2022
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
, , JETP Letters 2015 Vol. 148 No. 3 P. 509
We explore a combined effect of hexagonal warping and a finite effective mass on both the tunneling density of electronic surface states and the structure of Landau levels of 3D topological insulators. We find the increasing warping to transform the square-root van Hove singularity into a logarithmic one. For moderate warping, an additional logarithmic singularity ...
Added: December 3, 2016
, , et al., IEEE Transactions on Applied Superconductivity 2013 Vol. 23 No. 3 P. 2201204
In this paper, we present our approaches to the development of fiber-coupled superconducting single photon detectors with enhanced photon absorption. For such devices we have measured detection efficiency in wavelength range from 500 to 2000 nm. The best fiber coupled devices exhibit detection efficiency of 44.5% at 1310 nm wavelength and 35.5% at 1550 nm ...
Added: March 7, 2014
, , et al., IOP Conference Series: Materials Science and Engineering (MSE) 2020 Vol. 781 No. 1 P. 012011-1-012011-5
Spectral characteristics of WSi and NbN superconducting single-photon detectors with different surface resistance and width of nanowire strips have been investigated in the wavelength range of 1.3-2.5 µm. WSi structures with narrower strips demonstrated better performance for detection of single photons in longer wavelength range. The difference in normalized photon count rate for such structures ...
Added: December 10, 2020
, , , JETP Letters 2022 Vol. 116 No. 12 P. 891-895
We consider Majorana zero modes in a Josephson junction on top of a topological insulator in transverse magnetic field. Majorana zero modes reside at periodically located nodes of Josephson vortices. We find that hybridization of these modes is prohibited by symmetries of the problem at vanishing chemical potential, which ensures better protection of zero modes ...
Added: December 10, 2022
Small-angle neutron scattering in the fully polarized phase of noncollinear magnets with interfacial-like Dzyaloshinskii-Moriya interaction
, Physical Review B: Condensed Matter and Materials Physics 2022 Vol. 106 No. 17 Article 174408
Spin waves in noncollinear magnets with Cnv symmetry are discussed in the context of inelastic neutron scattering in small-angle scattering geometry. In the framework of aminimal model including exchange coupling, Dzyaloshinskii-Moriya interaction (DMI), and single-ion anisotropy, we consider the system properties at moderate external magnetic fields and in the high-field fully polarized phase. In the latter case, the ...
Added: November 21, 2022