Journal
Article title
Title variants
Languages of publication
Abstracts
The electron-phonon interaction is a very important and ubiquitous process in solids, affecting almost all their physical properties. In metals, where the relaxation processes depend on both electrons and phonons, all thermodynamic and transport properties are dictated by the electron-phonon interaction. A very strong manifestation of the electron-phonon interaction is related with the superconducting state. Here we report the effect of high pressure on the transport electron-phonon interaction, λ_{tr}, in superconducting systems such as YB_6 (T_c ≈ 7.5 K), Pb (T_c ≈7.2 K), Nb bulk or thin film (T_c ≈9.2 K), and in LaB_6 in which superconductivity was not yet observed. The expected pressure effect should correspond to the theoretically predicted negative pressure effect on T_c (except for Nb thin film and LaB_6). To determine the influence of pressure on λ_{tr}, we utilized the Bloch-Grüneisen fit (denoted also as "thermal spectroscopy") of the precise temperature dependence of resistivity measurements in the normal state up to a pressure of 2.8 GPa. Based on this fit the observed negative pressure effect on λ_{tr} values, dλ_{tr}/dp, are as follows: dλ_{tr}/dp ≈-0.045 GPa^{-1} for YB_6, dλ_{tr}/dp ≈-0.13 GPa^{-1} for Pb, dλ_{tr}/dp ≈-0.019 GPa^{-1} or -0.028 GPa^{-1} for Nb bulk or thin film, respectively, and dλ_{tr}/dp ≈-0.003 GPa^{-1} for LaB_6.
Discipline
Journal
Year
Volume
Issue
Pages
1039-1041
Physical description
Dates
published
2017-04
Contributors
author
- Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
- Institute of Physics, Faculty of Sciences, P.J. Safarik University, Park Angelinum 9, 040 01 Košice, Slovakia
author
- Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
author
- Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
author
- Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
author
- Institute for Problems of Materials Science, NASU, Krzyzhanovsky 3, 036 80 Kiev, Ukraine
author
- Institute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
References
- [1] G. Grimvall, Phys. Scr. 14, 63 (1976), doi: 10.1088/0031-8949/14/1-2/013
- [2] P.B. Allen, in: Handbook of Superconductivity, Ed. C.P. Poole, Jr., Academic Press, New York 1999
- [3] Yu.S. Ponosov, S.V. Streltsov, Phys. Rev. B 86, 045138 (2012), doi: 10.1103/PhysRevB.86.045138
- [4] Yu.S. Ponosov, A.A. Makhnev, S.V. Streltsov, V.B. Filipov, N.Yu. Shitsevalova, JETP Lett. 102, 503 (2015), doi: 10.1134/S0021364015200114
- [5] P. Samuely, M. Reiffers, K. Flachbart, A.I. Akimenko, I.K. Yanson, N.M. Ponomarenko, Yu.B. Paderno, J. Low. Temp. Phys. 71, 49 (1988), doi: 10.1007/BF00115040
- [6] I.K. Yanson, Yu.G. Naidyuk, Point-Contact Spectroscopy, Springer-Verlag, New York 2005
- [7] V.V. Struzhkin, Y.A. Timofeev, R.J. Hemley, H. Mao, Phys. Rev. Lett. 79, 4262 (1997), doi: 10.1103/PhysRevLett.79.4262
- [8] J.S. Tse, Z. Li, K. Uehara, Y. Ma, Phys. Rev. B 69, 132101 (2004), doi: 10.1103/PhysRevB.69.132101
- [9] R.E. Hodder, Phys. Rev. 180, 530 (1969), doi: 10.1103/PhysRev.180.530
- [10] R. Lortz, Y. Wang, U. Tutsch, S. Abe, C. Meingast, P. Popovich, W. Knafo, N. Shitsevalova, Yu.B. Paderno, A. Junod, Phys. Rev. B 73, 024512 (2006), doi: 10.1103/PhysRevB.73.024512
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv131n4140kz