American Institute of Physics: Low Temperature Physics: Table of Contents
Table of Contents for Low Temperature Physics. List of articles from both the latest and ahead of print issues.
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American Institute of Physics: Low Temperature Physics: Table of Contents
American Institute of Physics
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Low Temperature Physics
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Onedimensional narrowband conductors
https://aip.scitation.org/doi/10.1063/10.0005796?af=R&feed=mostrecent
Low Temperature Physics, <a href="https://aip.scitation.org/toc/ltp/47/9">Volume 47, Issue 9</a>, Page 715739, September 2021. <br/>We review onedimensional lattice models and the corresponding results that describe the
lowtemperature properties of quasionedimensional lattice systems with longrange
interaction. A widely known example is narrowband lowdimensional conductors with
longrange interelectron repulsion. The models deal with particles that live on the
onedimensional host lattice (chain), translation invariant or disordered, and interact
via the longrange repulsive potential. The results are presented concerning the
translation invariant host chain, in particular: the lowtemperature thermodynamics
incommensurable ground states and related devilstaircase form of various characteristics
as functions of pertinent parameters, the selflocalization of particles, a new branch of
elementary excitations, etc. In the disordered case, where the sites of the host chain
fluctuate randomly around the sites of the periodic chain, the lowtemperature
thermodynamics and the structure of the ground state are discussed in the framework of a
certain model, which we call the cluster model and which seems to be a fairly reasonable
approximation for low temperatures and small concentration of particles. Using analytical
and numerical tools we analyze the thermodynamics and the ground state of the model. The
latter proves to be a sequence of random domains and we study in detail their
distribution.
Low Temperature Physics, Volume 47, Issue 9, Page 715739, September 2021. <br/>We review onedimensional lattice models and the corresponding results that describe the
lowtemperature properties of quasionedimensional lattice systems with longrange
interaction. A widely known example is narrowband lowdimensional conductors with
longrange interelectron repulsion. The models deal with particles that live on the
onedimensional host lattice (chain), translation invariant or disordered, and interact
via the longrange repulsive potential. The results are presented concerning the
translation invariant host chain, in particular: the lowtemperature thermodynamics
incommensurable ground states and related devilstaircase form of various characteristics
as functions of pertinent parameters, the selflocalization of particles, a new branch of
elementary excitations, etc. In the disordered case, where the sites of the host chain
fluctuate randomly around the sites of the periodic chain, the lowtemperature
thermodynamics and the structure of the ground state are discussed in the framework of a
certain model, which we call the cluster model and which seems to be a fairly reasonable
approximation for low temperatures and small concentration of particles. Using analytical
and numerical tools we analyze the thermodynamics and the ground state of the model. The
latter proves to be a sequence of random domains and we study in detail their
distribution.
Onedimensional narrowband conductors
10.1063/10.0005796
Low Temperature Physics
20210929T03:25:03Z
© 2021 Author(s).
L. A. Pastur
V. V. Slavin
A. A. Krivchikov

Dynamics, properties and spectrum of reconnecting vortex loops in superfluid helium (Review article)
https://aip.scitation.org/doi/10.1063/10.0005797?af=R&feed=mostrecent
Low Temperature Physics, <a href="https://aip.scitation.org/toc/ltp/47/9">Volume 47, Issue 9</a>, Page 740753, September 2021. <br/>The quantum turbulence is a collection of the interacting quantum vortex loops and filaments. The main goal of this work is to systematize the information on the current state of the research on the reconnecting quantized vortex loops in the superfluid helium: the geometry, the dynamics, the properties of the vortex loops, the energy spectrum before and after the reconnections. The paper discusses the possible role of the reconnections in the formation of the turbulent spectrum. In addition, in this paper the main methods and approaches to the study of the reconnecting vortex loops and quantum turbulence are discussed.
Low Temperature Physics, Volume 47, Issue 9, Page 740753, September 2021. <br/>The quantum turbulence is a collection of the interacting quantum vortex loops and filaments. The main goal of this work is to systematize the information on the current state of the research on the reconnecting quantized vortex loops in the superfluid helium: the geometry, the dynamics, the properties of the vortex loops, the energy spectrum before and after the reconnections. The paper discusses the possible role of the reconnections in the formation of the turbulent spectrum. In addition, in this paper the main methods and approaches to the study of the reconnecting vortex loops and quantum turbulence are discussed.
Dynamics, properties and spectrum of reconnecting vortex loops in superfluid helium (Review article)
10.1063/10.0005797
Low Temperature Physics
20210929T03:24:59Z
© 2021 Author(s).
L. P. Kondaurova
V. A. Andryushchenko

Electronic spectra, topological states, and impurity effects in graphene
nanoribbons
https://aip.scitation.org/doi/10.1063/10.0005798?af=R&feed=mostrecent
Low Temperature Physics, <a href="https://aip.scitation.org/toc/ltp/47/9">Volume 47, Issue 9</a>, Page 754764, September 2021. <br/>We consider the finite ribbons of graphene with two principal orientations, zigzag and
armchair, of their edges to study in detail impurity effects on their edge states. An
alternative to the known description of quasiparticle states in terms of transversal
standing waves is proposed in the recurrence relations for their spectra vs discrete
numbers of atomic chains in the ribbon, permitting to simplify the Green function approach
to the disorder effects in these systems. The derived analysis shows the microscopic
mechanisms of perturbation by different types of impurities on low energy states and
clarifies how the stability of topological states in zigzag systems to disorder is related
to the discrete amplitudes of these states across the ribbon. An opposite possibility for
Mott localization under local impurity perturbations is found for armchair type
nanoribbons but at special values of their width.
Low Temperature Physics, Volume 47, Issue 9, Page 754764, September 2021. <br/>We consider the finite ribbons of graphene with two principal orientations, zigzag and
armchair, of their edges to study in detail impurity effects on their edge states. An
alternative to the known description of quasiparticle states in terms of transversal
standing waves is proposed in the recurrence relations for their spectra vs discrete
numbers of atomic chains in the ribbon, permitting to simplify the Green function approach
to the disorder effects in these systems. The derived analysis shows the microscopic
mechanisms of perturbation by different types of impurities on low energy states and
clarifies how the stability of topological states in zigzag systems to disorder is related
to the discrete amplitudes of these states across the ribbon. An opposite possibility for
Mott localization under local impurity perturbations is found for armchair type
nanoribbons but at special values of their width.
Electronic spectra, topological states, and impurity effects in graphene
nanoribbons
10.1063/10.0005798
Low Temperature Physics
20210929T03:24:58Z
© 2021 Author(s).
Yu. G. Pogorelov
D. Kochan
V. M. Loktev

Phenomenological description of spin dynamics in antiferromagnets: Short history and modern development
https://aip.scitation.org/doi/10.1063/10.0005799?af=R&feed=mostrecent
Low Temperature Physics, <a href="https://aip.scitation.org/toc/ltp/47/9">Volume 47, Issue 9</a>, Page 765773, September 2021. <br/>A brief review of alternative phenomenological approaches to the spin dynamics of antiferromagnets are discussed in virtue of modern interest to ultrafast spin dynamics and it application. Specific properties of antiferromagnets, first of all, the possibility of spin dynamics faster then for ferromagnets are described. Novel types of solitons for anisotropic antiferromagnets are discussed.
Low Temperature Physics, Volume 47, Issue 9, Page 765773, September 2021. <br/>A brief review of alternative phenomenological approaches to the spin dynamics of antiferromagnets are discussed in virtue of modern interest to ultrafast spin dynamics and it application. Specific properties of antiferromagnets, first of all, the possibility of spin dynamics faster then for ferromagnets are described. Novel types of solitons for anisotropic antiferromagnets are discussed.
Phenomenological description of spin dynamics in antiferromagnets: Short history and modern development
10.1063/10.0005799
Low Temperature Physics
20210929T03:24:57Z
© 2021 Author(s).
E. G. Galkina
B. A. Ivanov

Magnetic vortices in media with spatially inhomogeneous exchange
interaction
https://aip.scitation.org/doi/10.1063/10.0005800?af=R&feed=mostrecent
Low Temperature Physics, <a href="https://aip.scitation.org/toc/ltp/47/9">Volume 47, Issue 9</a>, Page 774783, September 2021. <br/>In the framework of the classical equations for the magnetization dynamics and the
collective variables approximation, the dynamics of magnetic vortices in twodimensional
ferromagnets with the easyplane anisotropy and spatially inhomogeneous exchange
interaction is considered. In the case of a wide straight line of the interface between
magnetic media with different but slightly different exchange interaction, the dependence
of the magnetic vortex velocity on its distance to the structure defect and position
inside the interface domain is obtained.
Low Temperature Physics, Volume 47, Issue 9, Page 774783, September 2021. <br/>In the framework of the classical equations for the magnetization dynamics and the
collective variables approximation, the dynamics of magnetic vortices in twodimensional
ferromagnets with the easyplane anisotropy and spatially inhomogeneous exchange
interaction is considered. In the case of a wide straight line of the interface between
magnetic media with different but slightly different exchange interaction, the dependence
of the magnetic vortex velocity on its distance to the structure defect and position
inside the interface domain is obtained.
Magnetic vortices in media with spatially inhomogeneous exchange
interaction
10.1063/10.0005800
Low Temperature Physics
20210929T03:25:04Z
© 2021 Author(s).
A. S. Kovalev

Magnetoelastic effects in the hyperhoneycomb Kitaev spin liquid
https://aip.scitation.org/doi/10.1063/10.0005801?af=R&feed=mostrecent
Low Temperature Physics, <a href="https://aip.scitation.org/toc/ltp/47/9">Volume 47, Issue 9</a>, Page 784793, September 2021. <br/>In recent years, several magnetic Mott insulators with strong spinorbit coupling were suggested to be proximate to the Kitaev quantum spin liquid, whose one of the most exciting features is the fractionalization of spin excitations into itinerant Majorana fermions and static Z2 fluxes. Unfortunately, the ground states of these systems cannot be easily captured by experiment, remaining featureless to conventional local probes. Here, we propose to study the signatures of fractionalized excitations by exploiting their coupling to the lattice vibrations, dubbed magnetoelastic coupling, which arises from the fact that the interaction between spins depends on the relative distance between them. We argue that the magnetoelastic coupling can lead to the distinct modification of the phonon dynamics, which can be observed by measuring renormalized phonon spectrum, the sound attenuation, and the phonon Hall viscosity. This makes the phonon dynamics a promising tool for the characterization and identification of quantum spin liquid phases. In this work, we focus on the magnetoelastic effects in the threedimensional Kitaev model realized on the hyperhoneycomb lattice. The hyperhoneycomb Kitaev spin liquid is particularly interesting since the strong Kitaev interaction was observed in the Kitaev magnet βLi2IrO3, for which the spinorbit entangled Jeff = 1/2 moments of iridium ions form precisely the hyperhoneycomb lattice.
Low Temperature Physics, Volume 47, Issue 9, Page 784793, September 2021. <br/>In recent years, several magnetic Mott insulators with strong spinorbit coupling were suggested to be proximate to the Kitaev quantum spin liquid, whose one of the most exciting features is the fractionalization of spin excitations into itinerant Majorana fermions and static Z2 fluxes. Unfortunately, the ground states of these systems cannot be easily captured by experiment, remaining featureless to conventional local probes. Here, we propose to study the signatures of fractionalized excitations by exploiting their coupling to the lattice vibrations, dubbed magnetoelastic coupling, which arises from the fact that the interaction between spins depends on the relative distance between them. We argue that the magnetoelastic coupling can lead to the distinct modification of the phonon dynamics, which can be observed by measuring renormalized phonon spectrum, the sound attenuation, and the phonon Hall viscosity. This makes the phonon dynamics a promising tool for the characterization and identification of quantum spin liquid phases. In this work, we focus on the magnetoelastic effects in the threedimensional Kitaev model realized on the hyperhoneycomb lattice. The hyperhoneycomb Kitaev spin liquid is particularly interesting since the strong Kitaev interaction was observed in the Kitaev magnet βLi2IrO3, for which the spinorbit entangled Jeff = 1/2 moments of iridium ions form precisely the hyperhoneycomb lattice.
Magnetoelastic effects in the hyperhoneycomb Kitaev spin liquid
10.1063/10.0005801
Low Temperature Physics
20210929T03:25:04Z
© 2021 Author(s).
A. Shiralieva
A. Prokoshin
N. B. Perkins

Chronicle: The last accomplishment of B. I. Verkin
https://aip.scitation.org/doi/10.1063/10.0005802?af=R&feed=mostrecent
Low Temperature Physics, <a href="https://aip.scitation.org/toc/ltp/47/9">Volume 47, Issue 9</a>, Page 794801, September 2021. <br/>The paper describes the decisive role by B. I. Verkin, the founder of the Institute for Low Temperature Physics and Engineering (ILTPE) and the journal Low Temperature Physics, in the return from the near 50year oblivion the name of L. V. Shubnikov, an outstanding Soviet physicist arrested and executed in 1937. We begin with a brief survey of Shubnikov’s works, several of them are of the Nobel prize level. Then we briefly describe the foundation by B. I. Verkin of the Institute for Low Temperature Physics and Engineering. Finally, we outline the history of writing the book about Shubnikov and the outstanding efforts by B. I. Verkin in the realization of this last, according to him, achievement of his life.
Low Temperature Physics, Volume 47, Issue 9, Page 794801, September 2021. <br/>The paper describes the decisive role by B. I. Verkin, the founder of the Institute for Low Temperature Physics and Engineering (ILTPE) and the journal Low Temperature Physics, in the return from the near 50year oblivion the name of L. V. Shubnikov, an outstanding Soviet physicist arrested and executed in 1937. We begin with a brief survey of Shubnikov’s works, several of them are of the Nobel prize level. Then we briefly describe the foundation by B. I. Verkin of the Institute for Low Temperature Physics and Engineering. Finally, we outline the history of writing the book about Shubnikov and the outstanding efforts by B. I. Verkin in the realization of this last, according to him, achievement of his life.
Chronicle: The last accomplishment of B. I. Verkin
10.1063/10.0005802
Low Temperature Physics
20210929T03:25:04Z
© 2021 Author(s).
S. A. Gredeskul
L. A. Pastur
Yu. A. Freiman