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## Magneto-quantum oscillations in Bi2Se3 nanowires

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 the presence not only of oscillations with a period corresponding to the flux quantum (Φ0 = hc/e), but also oscillations with a period of 2Φ0 and 4Φ0. Possible mechanisms of the observed effect are discussed.

Keywords: эффект Ааронова-БомаAharonov-Bohm Effecttopological insulatorтопологический изоляторnanowiresнанопроволокинизкие температурыlow temperatures

Publication based on the results of:

Овешников Л. Н., Нехаева Е. И., Прудкогляд В. А. 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

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

Bograchev D., Volgin V., Davydov A., Electrochimica Acta 2013 Vol. 96 P. 1-7

A simple model of electrochemical growth of nanowires in the pores of anodic aluminum oxide (AAO) template is developed. The metal deposition is considered at various overpotentials. The model takes into consideration the ionic transfer both in the varying diffusion layer in the pores and in the diffusion layer above the template, which is determined ...

Added: March 14, 2015

Demishev S. V., Gilmanov M., Samarin A. 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

Aronzon B. A., Oveshnikov L. N., Prudkoglyad V. 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

Burmistrov I., Repin E., 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

Мальшуков А. Г., 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

Gridchin V. O., Kotlyar K. P., Reznik R. R. et al., Nanotechnology 2021 Vol. 32 No. 33 Article 335604

InGaN nanostructures are among the most promising candidates for visible solid-state lighting
and renewable energy sources. To date, there is still a lack of information about the influence of
the growth conditions on the physical properties of these nanostructures. Here, we extend the
study of InGaN nanowires growth directly on Si substrates by plasma-assisted molecular beam
epitaxy. The results ...

Added: August 30, 2021

Eminov P. A., Sezonov Y. I., Ul’din A., Russian Journal of Mathematical Physics 2009 Vol. 16 No. 4 P. 563-565

An analytic description of Aharonov – Bohm oscillation of the Coulomb potential of an immovable point charge in a magnetized Electronic gas of quantum cylinder is given. ...

Added: December 31, 2012

Shcherbatenko M., Lobanov Y., Semenov A. et al., Proceedings of SPIE 2017 Vol. 10229 P. 102290G-1-102290G-12

Achievement of the ultimate sensitivity along with a high spectral resolution is one of the frequently addressed problems, as the complication of the applied and fundamental scientific tasks being explored is growing up gradually. In our work, we have investigated performance of a superconducting nanowire photon-counting detector operating in the coherent mode for detection of ...

Added: October 13, 2017

Zasimov P. V., Ryazantsev S. V., Tyurin D. A. 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

Kuntsevich A., 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

Мальшуков А. Г., Physical Review B: Condensed Matter and Materials Physics 2020 Vol. 101 P. 134514-1-134514-7

A nonuniform in-plane Zeeman field can induce spontaneous supercurrents of spin-orbit-coupled electrons in
superconducting two-dimensional systems and thin films. In this work it is shown that current vortices can be
created at the ends of a long homogeneously magnetized strip of a ferromagnetic insulator, which is deposited on
the surface of a three-dimensional topological insulator. The s-wave superconductivity ...

Added: January 20, 2021

Сибирев Н. В., Berdnikov Y., Федоров В. В. et al., Физика и техника полупроводников 2021 Т. 55 № 11 С. 969-972

A precise model for calculating dependence of selfcatalyzed Ga (As, P) nanowires composition on growth parameters without any fitting parameters is proposed. It is shown that the Ga(As, P) nanowires composition does not depend on the growth rate at a fixed ratio of group V and group III atoms total fluxes. The results of modeling ...

Added: October 14, 2021

Karabassov T., Vasenko A., Известия Уфимского научного центра РАН 2021 Т. 1 С. 10-16

Materials that possess strong spin-orbit interaction have provoked great interest over the past few years, in
particular, in the actively developing field of quantum calculations. A topological insulator is a good example of
such a material. The topological insulator has high surface conductivity, whereas in the body it shows the properties
of an insulator, this being a purely ...

Added: December 30, 2020

Kuntsevich A., Shupletsov A., Nunuparov M., 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

Zasimov P. V., Ryazantsev S. V., Tyurin D. A. et al., Monthly Notices of the Royal Astronomical Society 2020 Vol. 491 No. 4 P. 5140-5150

Investigations of the low-temperature radiation-induced transformations in the C2H2–H2O system are relevant to the chemistry occurring in interstellar and cometary ices. In this work, we applied a matrix isolation technique to study the radiation-driven evolution of this system at molecular level in order to get new mechanistic insight. The 1:1 C2H2⋅ ⋅ ⋅H2O complexes were prepared in ...

Added: January 21, 2021

Bograchev D., Electrochimica Acta 2013 Vol. 112 P. 279-286

A model of inhomogeneous pores filling during electrodeposition of ordered metal nanowire arrays isdeveloped. The model takes into consideration the ionic transfer both in the varying diffusion layer in thepores and in the diffusion layer above the template, which is determined by the external hydrodynamicconditions. The model takes into account the kinetics of electrochemical reaction ...

Added: March 16, 2015

Kuntsevich A., Shupletsov A., Minkov G., 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

Eminov P. A., Журнал экспериментальной и теоретической физики 2009 Т. 135 № 5 С. 1029-1036

Построена квантовая теория экранирования кулоновского поля точечного заряда в намагниченном электронном газе квантового цилиндра. Вычислены асимптотики экранированного потенциала, как для вырожденного, так и для больцмановского газа. Показано, что в вырожденном случае результат наряду с известной квазиклассической монотонной частью содержит квантовую осциллирующую часть, которая соответствует осцилляциям Фриделя. Дано аналитическое описание осцилляций Ааронова-Бома экранированного кулоновского потенциала неподвижного ...

Added: January 4, 2013

Kuntsevich A., Morgun L., Pudalov V., 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

Verbus V. A., Protogenov A. P., Chulkov E. V., The Density of Surface States in Weyl Semimetals / Cornell University. Series cond-mat "arxiv.org". 2014. No. 1406.1507.

Weyl semimetal is a three-dimensional material with a conical spectrum near an even number of point nodes, where two bands touch each other. Here we study spectral properties of surface electron states in such a system. We show that the density of surface states possesses a logarithmic singularity for the energy to 0. It decreases ...

Added: March 8, 2016

Семенов А., Девятов И., Третьяков И. et al., Журнал радиоэлектроники 2011 № 11

Nonlinear Ginzburg-Landau equation for dirty supercondicting 1D wire is derived in the limit of high magnetic field. ...

Added: October 12, 2017

Karabassov T., Golubov A., Silkin V. et al., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 103 P. 224508-1-224508-9

Superconducting hybrid structures with topological order and induced magnetization offer a promising way to realize fault-tolerant quantum computation. However, the effect of the interplay between magnetization and the property of the topological insulator surface, otherwise known as spin-momentum locking on the superconducting proximity effect, still remains to be investigated. We relied on the quasiclassical self-consistent ...

Added: June 4, 2021