Righi-Leduc effect in Y- and Bi-based high-Tc superconductors

B. Zeini; A. Freimuth; B. Büchner; R. Gross; A. P. Kampf; M. Kläser; G. Müller-Vogt

doi:10.1016/S0921-4534(99)00076-3

Righi-Leduc effect in Y- and Bi-based high-T_c superconductors

B. Zeini, A. Freimuth, B. Büchner, R. Gross, A. P. Kampf, M. Kläser, G. Müller-Vogt

Research output: Contribution to journal › Conference article › peer-review

4 Scopus citations

Abstract

Measurements of the transverse (k_xy) and longitudinal (k_xx) thermal conductivity in the superconducting state of single crystals of YBa₂Cu₃O_7-δ (YBCO) and Bi₂Sr₂CaCu₂O_8-δ (BSCCO) are presented in applied magnetic fields up to 14 T. We separate the electronic thermal conductivity (k_xx^el) of the CuO₂-planes from the phononic thermal conductivity (k_xx^ph) using k_xy and the magnetic field dependence of k_xx. Our main results are: (1) In YBCO k_xx^el(T) shows a pronounced maximum. We attribute this to a rapid increase of the quasiparticle scattering time τ below T_c. The maximum of k_xx^el(T) in BSCCO is much smaller due to stronger impurity scattering. The maximum of k_xx is strongly suppressed by a magnetic field, presumably because of scattering of QPs on vortices. (2) Our data analysis reveals that below T_c a transport (τ) and Hall (τ_H) relaxation time must be distinguished as in the normal state. Whereas τ is strongly enhanced below T_c, τ_H displays the same temperature dependence as above T_c.

Original language	English
Pages (from-to)	325-332
Number of pages	8
Journal	Physica C: Superconductivity and its Applications
Volume	317-318
DOIs	https://doi.org/10.1016/S0921-4534(99)00076-3
State	Published - May 1999
Externally published	Yes
Event	Proceedings of the 1998 1st Euroconference on Anomalous Complex Superconductors - Crete, Greece Duration: 26 Sep 1998 → 3 Oct 1998

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title = "Righi-Leduc effect in Y- and Bi-based high-Tc superconductors",

abstract = "Measurements of the transverse (kxy) and longitudinal (kxx) thermal conductivity in the superconducting state of single crystals of YBa2Cu3O7-δ (YBCO) and Bi2Sr2CaCu2O8-δ (BSCCO) are presented in applied magnetic fields up to 14 T. We separate the electronic thermal conductivity (kxxel) of the CuO2-planes from the phononic thermal conductivity (kxxph) using kxy and the magnetic field dependence of kxx. Our main results are: (1) In YBCO kxxel(T) shows a pronounced maximum. We attribute this to a rapid increase of the quasiparticle scattering time τ below Tc. The maximum of kxxel(T) in BSCCO is much smaller due to stronger impurity scattering. The maximum of kxx is strongly suppressed by a magnetic field, presumably because of scattering of QPs on vortices. (2) Our data analysis reveals that below Tc a transport (τ) and Hall (τH) relaxation time must be distinguished as in the normal state. Whereas τ is strongly enhanced below Tc, τH displays the same temperature dependence as above Tc.",

author = "B. Zeini and A. Freimuth and B. B{\"u}chner and R. Gross and Kampf, {A. P.} and M. Kl{\"a}ser and G. M{\"u}ller-Vogt",

year = "1999",

month = may,

doi = "10.1016/S0921-4534(99)00076-3",

language = "English",

volume = "317-318",

pages = "325--332",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

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note = "Proceedings of the 1998 1st Euroconference on Anomalous Complex Superconductors ; Conference date: 26-09-1998 Through 03-10-1998",

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TY - JOUR

T1 - Righi-Leduc effect in Y- and Bi-based high-Tc superconductors

AU - Zeini, B.

AU - Freimuth, A.

AU - Büchner, B.

AU - Gross, R.

AU - Kampf, A. P.

AU - Kläser, M.

AU - Müller-Vogt, G.

PY - 1999/5

Y1 - 1999/5

N2 - Measurements of the transverse (kxy) and longitudinal (kxx) thermal conductivity in the superconducting state of single crystals of YBa2Cu3O7-δ (YBCO) and Bi2Sr2CaCu2O8-δ (BSCCO) are presented in applied magnetic fields up to 14 T. We separate the electronic thermal conductivity (kxxel) of the CuO2-planes from the phononic thermal conductivity (kxxph) using kxy and the magnetic field dependence of kxx. Our main results are: (1) In YBCO kxxel(T) shows a pronounced maximum. We attribute this to a rapid increase of the quasiparticle scattering time τ below Tc. The maximum of kxxel(T) in BSCCO is much smaller due to stronger impurity scattering. The maximum of kxx is strongly suppressed by a magnetic field, presumably because of scattering of QPs on vortices. (2) Our data analysis reveals that below Tc a transport (τ) and Hall (τH) relaxation time must be distinguished as in the normal state. Whereas τ is strongly enhanced below Tc, τH displays the same temperature dependence as above Tc.

AB - Measurements of the transverse (kxy) and longitudinal (kxx) thermal conductivity in the superconducting state of single crystals of YBa2Cu3O7-δ (YBCO) and Bi2Sr2CaCu2O8-δ (BSCCO) are presented in applied magnetic fields up to 14 T. We separate the electronic thermal conductivity (kxxel) of the CuO2-planes from the phononic thermal conductivity (kxxph) using kxy and the magnetic field dependence of kxx. Our main results are: (1) In YBCO kxxel(T) shows a pronounced maximum. We attribute this to a rapid increase of the quasiparticle scattering time τ below Tc. The maximum of kxxel(T) in BSCCO is much smaller due to stronger impurity scattering. The maximum of kxx is strongly suppressed by a magnetic field, presumably because of scattering of QPs on vortices. (2) Our data analysis reveals that below Tc a transport (τ) and Hall (τH) relaxation time must be distinguished as in the normal state. Whereas τ is strongly enhanced below Tc, τH displays the same temperature dependence as above Tc.

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U2 - 10.1016/S0921-4534(99)00076-3

DO - 10.1016/S0921-4534(99)00076-3

M3 - Conference article

AN - SCOPUS:0033132885

SN - 0921-4534

VL - 317-318

SP - 325

EP - 332

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

T2 - Proceedings of the 1998 1st Euroconference on Anomalous Complex Superconductors

Y2 - 26 September 1998 through 3 October 1998

ER -

Righi-Leduc effect in Y- and Bi-based high-T_c superconductors

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