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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2009, Volume 90, Issue 2, Pages 140–143
(Mi jetpl484)
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This article is cited in 15 scientific papers (total in 15 papers)
CONDENSED MATTER
Transport properties and the anisotropy of Ba$_{1-x}$K$_x$Fe$_2$As$_2$ single crystals in normal and superconducting states
V. N. Zvereva, A. V. Korobenkoba, G. L. Sunc, D. L. Sunc, C. T. Linc, A. V. Borisc a Institute of Solid State Physics RAS
b Moscow Institute of Physics and Technology
c Max Planck Institut für Festkörperforschung,
70569 Stuttgart, Germany
Abstract:
The transport and superconducting properties of Ba$_{1-x}$K$_x$Fe$_2$As$_2$ single crystals with $T_c\approx31$ K were studied. Both in-plane and out-of-plane resistivity was measured by a modified Montgomery method. The in-plane resistivity is almost the same for all studied samples, unlike the out-of-plane resistivity, which differs considerably. We have found that the resistivity anisotropy $\gamma=\rho_c/\rho_{ab}$ is almost independent of temperature and lies in the range 10–30 for the studied samples. This indicates the extrinsic nature of high out-of-plane resistivity, which may be due to the presence of flat defects along Fe-As layers in the samples. This statement is supported by comparatively small effective mass anisotropy, obtained from the upper critical field measurements, and from the observation of the so-called “Friedel transition”, which indicates the existence of some disorder in the samples in the c-direction.
Received: 16.06.2009
Citation:
V. N. Zverev, A. V. Korobenko, G. L. Sun, D. L. Sun, C. T. Lin, A. V. Boris, “Transport properties and the anisotropy of Ba$_{1-x}$K$_x$Fe$_2$As$_2$ single crystals in normal and superconducting states”, Pis'ma v Zh. Èksper. Teoret. Fiz., 90:2 (2009), 140–143; JETP Letters, 90:2 (2009), 130–133
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Abstract page: | 198 | Full-text PDF : | 65 | References: | 35 |
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