Electronic band structure and superconducting properties of SnAs

P. I. Bezotosnyi, K. A. Dmitrieva, A. V. Sadakov, K. S. Pervakov, A. V. Muratov, A. S. Usoltsev, A. Yu. Tsvetkov, S. Yu. Gavrilkin, N. S. Pavlov, A. A. Slobodchikov, O. Yu. Vilkov, A. G. Rybkin, I. A. Nekrasov, V. M. Pudalov

Результат исследований: Научные публикации в периодических изданияхстатья

Выдержка

We report a comprehensive study of physical properties of the binary superconductor compound SnAs. The electronic band structure of SnAs was investigated using both angle-resolved photoemission spectroscopy
(ARPES) in a wide binding energy range and density functional theory (DFT) within generalized gradient approximation (GGA). The DFT/GGA calculations were done including spin-orbit coupling for both bulk and (111) slab crystal structures. Comparison of the DFT/GGA band dispersions with ARPES data shows that the spectrum for the (111) slab much better describes ARPES data than that for the bulk. In addition, we studied experimentally superconducting properties of SnAs by specific heat, magnetic susceptibility, magnetotransport
measurements, and Andreev reflection spectroscopy. Temperature dependencies of the superconducting gap and of the specific heat were found to be well consistent with those expected for the single band BCS superconductors
with an isotropic s-wave order parameter. Despite spin-orbit coupling present in SnAs, our data show no signatures of a potential unconventional superconductivity, and the characteristic BCS ratio 2/Tc = 3.48–3.73 is very close to the BCS value in the weak coupling limit.
Язык оригиналаанглийский
Номер статьи184514
Число страниц12
ЖурналPhysical Review B - Condensed Matter and Materials Physics
Том100
Номер выпуска18
СостояниеОпубликовано - 27 ноя 2019

Отпечаток

Photoelectron spectroscopy
Band structure
Density functional theory
Specific heat
photoelectric emission
Orbits
density functional theory
electronics
gradients
spectroscopy
slabs
approximation
specific heat
Superconductivity
Binding energy
orbits
Magnetic susceptibility
Dispersions
Superconducting materials
Physical properties

Цитировать

Bezotosnyi, P. I., Dmitrieva, K. A., Sadakov, A. V., Pervakov, K. S., Muratov, A. V., Usoltsev, A. S., ... Pudalov, V. M. (2019). Electronic band structure and superconducting properties of SnAs. Physical Review B - Condensed Matter and Materials Physics, 100(18), [184514].
Bezotosnyi, P. I. ; Dmitrieva, K. A. ; Sadakov, A. V. ; Pervakov, K. S. ; Muratov, A. V. ; Usoltsev, A. S. ; Tsvetkov, A. Yu. ; Gavrilkin, S. Yu. ; Pavlov, N. S. ; Slobodchikov, A. A. ; Vilkov, O. Yu. ; Rybkin, A. G. ; Nekrasov, I. A. ; Pudalov, V. M. . / Electronic band structure and superconducting properties of SnAs. В: Physical Review B - Condensed Matter and Materials Physics. 2019 ; Том 100, № 18.
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title = "Electronic band structure and superconducting properties of SnAs",
abstract = "We report a comprehensive study of physical properties of the binary superconductor compound SnAs. The electronic band structure of SnAs was investigated using both angle-resolved photoemission spectroscopy(ARPES) in a wide binding energy range and density functional theory (DFT) within generalized gradient approximation (GGA). The DFT/GGA calculations were done including spin-orbit coupling for both bulk and (111) slab crystal structures. Comparison of the DFT/GGA band dispersions with ARPES data shows that the spectrum for the (111) slab much better describes ARPES data than that for the bulk. In addition, we studied experimentally superconducting properties of SnAs by specific heat, magnetic susceptibility, magnetotransportmeasurements, and Andreev reflection spectroscopy. Temperature dependencies of the superconducting gap and of the specific heat were found to be well consistent with those expected for the single band BCS superconductorswith an isotropic s-wave order parameter. Despite spin-orbit coupling present in SnAs, our data show no signatures of a potential unconventional superconductivity, and the characteristic BCS ratio 2/Tc = 3.48–3.73 is very close to the BCS value in the weak coupling limit.",
author = "Bezotosnyi, {P. I.} and Dmitrieva, {K. A.} and Sadakov, {A. V.} and Pervakov, {K. S.} and Muratov, {A. V.} and Usoltsev, {A. S.} and Tsvetkov, {A. Yu.} and Gavrilkin, {S. Yu.} and Pavlov, {N. S.} and Slobodchikov, {A. A.} and Vilkov, {O. Yu.} and Rybkin, {A. G.} and Nekrasov, {I. A.} and Pudalov, {V. M.}",
year = "2019",
month = "11",
day = "27",
language = "English",
volume = "100",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
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number = "18",

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Bezotosnyi, PI, Dmitrieva, KA, Sadakov, AV, Pervakov, KS, Muratov, AV, Usoltsev, AS, Tsvetkov, AY, Gavrilkin, SY, Pavlov, NS, Slobodchikov, AA, Vilkov, OY, Rybkin, AG, Nekrasov, IA & Pudalov, VM 2019, 'Electronic band structure and superconducting properties of SnAs', Physical Review B - Condensed Matter and Materials Physics, том. 100, № 18, 184514.

Electronic band structure and superconducting properties of SnAs. / Bezotosnyi, P. I. ; Dmitrieva, K. A. ; Sadakov, A. V. ; Pervakov, K. S. ; Muratov, A. V. ; Usoltsev, A. S. ; Tsvetkov, A. Yu. ; Gavrilkin, S. Yu. ; Pavlov, N. S. ; Slobodchikov, A. A. ; Vilkov, O. Yu. ; Rybkin, A. G. ; Nekrasov, I. A. ; Pudalov, V. M. .

В: Physical Review B - Condensed Matter and Materials Physics, Том 100, № 18, 184514, 27.11.2019.

Результат исследований: Научные публикации в периодических изданияхстатья

TY - JOUR

T1 - Electronic band structure and superconducting properties of SnAs

AU - Bezotosnyi, P. I.

AU - Dmitrieva, K. A.

AU - Sadakov, A. V.

AU - Pervakov, K. S.

AU - Muratov, A. V.

AU - Usoltsev, A. S.

AU - Tsvetkov, A. Yu.

AU - Gavrilkin, S. Yu.

AU - Pavlov, N. S.

AU - Slobodchikov, A. A.

AU - Vilkov, O. Yu.

AU - Rybkin, A. G.

AU - Nekrasov, I. A.

AU - Pudalov, V. M.

PY - 2019/11/27

Y1 - 2019/11/27

N2 - We report a comprehensive study of physical properties of the binary superconductor compound SnAs. The electronic band structure of SnAs was investigated using both angle-resolved photoemission spectroscopy(ARPES) in a wide binding energy range and density functional theory (DFT) within generalized gradient approximation (GGA). The DFT/GGA calculations were done including spin-orbit coupling for both bulk and (111) slab crystal structures. Comparison of the DFT/GGA band dispersions with ARPES data shows that the spectrum for the (111) slab much better describes ARPES data than that for the bulk. In addition, we studied experimentally superconducting properties of SnAs by specific heat, magnetic susceptibility, magnetotransportmeasurements, and Andreev reflection spectroscopy. Temperature dependencies of the superconducting gap and of the specific heat were found to be well consistent with those expected for the single band BCS superconductorswith an isotropic s-wave order parameter. Despite spin-orbit coupling present in SnAs, our data show no signatures of a potential unconventional superconductivity, and the characteristic BCS ratio 2/Tc = 3.48–3.73 is very close to the BCS value in the weak coupling limit.

AB - We report a comprehensive study of physical properties of the binary superconductor compound SnAs. The electronic band structure of SnAs was investigated using both angle-resolved photoemission spectroscopy(ARPES) in a wide binding energy range and density functional theory (DFT) within generalized gradient approximation (GGA). The DFT/GGA calculations were done including spin-orbit coupling for both bulk and (111) slab crystal structures. Comparison of the DFT/GGA band dispersions with ARPES data shows that the spectrum for the (111) slab much better describes ARPES data than that for the bulk. In addition, we studied experimentally superconducting properties of SnAs by specific heat, magnetic susceptibility, magnetotransportmeasurements, and Andreev reflection spectroscopy. Temperature dependencies of the superconducting gap and of the specific heat were found to be well consistent with those expected for the single band BCS superconductorswith an isotropic s-wave order parameter. Despite spin-orbit coupling present in SnAs, our data show no signatures of a potential unconventional superconductivity, and the characteristic BCS ratio 2/Tc = 3.48–3.73 is very close to the BCS value in the weak coupling limit.

UR - https://journals.aps.org/prb/issues/100/18

M3 - Article

VL - 100

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 18

M1 - 184514

ER -

Bezotosnyi PI, Dmitrieva KA, Sadakov AV, Pervakov KS, Muratov AV, Usoltsev AS и соавт. Electronic band structure and superconducting properties of SnAs. Physical Review B - Condensed Matter and Materials Physics. 2019 Нояб. 27;100(18). 184514.