Loffe-Regel' crossover and boson peaks in disordered solid solutions and similar anomalies in heterogeneous crystalline structures

I. A. Gospodarev; V. I. Grishaev; A. V. Kotlyar; K. V. Kravchenko; E. V. Manzheliǐ; E. S. Syrkin; S. B. Feodos'Ev

doi:10.1063/1.2967512

Loffe-Regel' crossover and boson peaks in disordered solid solutions and similar anomalies in heterogeneous crystalline structures

I. A. Gospodarev, V. I. Grishaev, A. V. Kotlyar, K. V. Kravchenko, E. V. Manzheliǐ, E. S. Syrkin, S. B. Feodos'Ev

Research output: Contribution to journal › Article › peer-review

Abstract

Low-frequency features of the phonon spectra of disordered solid solutions and heterogeneous crystalline structures are analyzed at the microscopic level. It is shown that boson-peak type excitations can arise in disordered solid solutions whose sites have only translational degrees of freedom. Thus it is established that such excitations appear mainly because of the additional positional dispersion of sound waves which is due to the disordering. The influence of boson-peak excitations on the low-temperature specific heat is investigated. It is found that in a number of cases the specific heat is more sensitive to excitations of this kind than the low-frequency density of states is. It is shown that anomalies similar to Ioffe-Regel' crossover and boson peaks can also arise in disordered heterogeneous crystalline structures with a complicated lattice.

Original language	English
Pages (from-to)	655-664
Number of pages	10
Journal	Low Temperature Physics
Volume	34
Issue number	8
DOIs	https://doi.org/10.1063/1.2967512
Publication status	Published - 9 Oct 2008

Bibliographical note

Copyright © 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Low Temperature Physics 34, 655 (2008) and may be found at https://doi.org/10.1063/1.2967512

Access to Document

10.1063/1.2967512

Ioffe–Regel’ crossover and boson peaks
Copyright © 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Low Temperature Physics 34, 655 (2008) and may be found at https://doi.org/10.1063/1.2967512
Final published version, 721 KB

Cite this

@article{0e12c8b4a3c7434fa342c8e5e8d734e0,

title = "Loffe-Regel' crossover and boson peaks in disordered solid solutions and similar anomalies in heterogeneous crystalline structures",

abstract = "Low-frequency features of the phonon spectra of disordered solid solutions and heterogeneous crystalline structures are analyzed at the microscopic level. It is shown that boson-peak type excitations can arise in disordered solid solutions whose sites have only translational degrees of freedom. Thus it is established that such excitations appear mainly because of the additional positional dispersion of sound waves which is due to the disordering. The influence of boson-peak excitations on the low-temperature specific heat is investigated. It is found that in a number of cases the specific heat is more sensitive to excitations of this kind than the low-frequency density of states is. It is shown that anomalies similar to Ioffe-Regel' crossover and boson peaks can also arise in disordered heterogeneous crystalline structures with a complicated lattice.",

author = "Gospodarev, {I. A.} and Grishaev, {V. I.} and Kotlyar, {A. V.} and Kravchenko, {K. V.} and Manzheliǐ, {E. V.} and Syrkin, {E. S.} and Feodos'Ev, {S. B.}",

note = "Copyright {\textcopyright} 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Low Temperature Physics 34, 655 (2008) and may be found at https://doi.org/10.1063/1.2967512",

year = "2008",

month = oct,

day = "9",

doi = "10.1063/1.2967512",

language = "English",

volume = "34",

pages = "655--664",

journal = "Low Temperature Physics",

issn = "1063-777X",

publisher = "American Institute of Physics Publising LLC",

number = "8",

}

TY - JOUR

T1 - Loffe-Regel' crossover and boson peaks in disordered solid solutions and similar anomalies in heterogeneous crystalline structures

AU - Gospodarev, I. A.

AU - Grishaev, V. I.

AU - Kotlyar, A. V.

AU - Kravchenko, K. V.

AU - Manzheliǐ, E. V.

AU - Syrkin, E. S.

AU - Feodos'Ev, S. B.

N1 - Copyright © 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Low Temperature Physics 34, 655 (2008) and may be found at https://doi.org/10.1063/1.2967512

PY - 2008/10/9

Y1 - 2008/10/9

N2 - Low-frequency features of the phonon spectra of disordered solid solutions and heterogeneous crystalline structures are analyzed at the microscopic level. It is shown that boson-peak type excitations can arise in disordered solid solutions whose sites have only translational degrees of freedom. Thus it is established that such excitations appear mainly because of the additional positional dispersion of sound waves which is due to the disordering. The influence of boson-peak excitations on the low-temperature specific heat is investigated. It is found that in a number of cases the specific heat is more sensitive to excitations of this kind than the low-frequency density of states is. It is shown that anomalies similar to Ioffe-Regel' crossover and boson peaks can also arise in disordered heterogeneous crystalline structures with a complicated lattice.

AB - Low-frequency features of the phonon spectra of disordered solid solutions and heterogeneous crystalline structures are analyzed at the microscopic level. It is shown that boson-peak type excitations can arise in disordered solid solutions whose sites have only translational degrees of freedom. Thus it is established that such excitations appear mainly because of the additional positional dispersion of sound waves which is due to the disordering. The influence of boson-peak excitations on the low-temperature specific heat is investigated. It is found that in a number of cases the specific heat is more sensitive to excitations of this kind than the low-frequency density of states is. It is shown that anomalies similar to Ioffe-Regel' crossover and boson peaks can also arise in disordered heterogeneous crystalline structures with a complicated lattice.

UR - http://www.scopus.com/inward/record.url?scp=54749119266&partnerID=8YFLogxK

UR - https://aip.scitation.org/doi/10.1063/1.2967512

U2 - 10.1063/1.2967512

DO - 10.1063/1.2967512

M3 - Article

AN - SCOPUS:54749119266

SN - 1063-777X

VL - 34

SP - 655

EP - 664

JO - Low Temperature Physics

JF - Low Temperature Physics

IS - 8

ER -

Loffe-Regel' crossover and boson peaks in disordered solid solutions and similar anomalies in heterogeneous crystalline structures

Abstract

Bibliographical note

Access to Document

Other files and links

Fingerprint

Cite this