Test of the Wiedemann-Franz law in an optimally doped cuprate

被引：18

作者：

Bel, R

Behnia, K

Proust, C

van der Linden, P

Maude, D

Vedeneev, SI

机构：

[1] Ecole Super Phys & Chim Ind Ville Paris, CNRS, Phys Quant Lab, F-75231 Paris, France

[2] CNRS, Lab Natl Champs Magnet Pulses, F-31432 Toulouse, France

[3] CNRS, MPI, Grenoble High Magnet Field Lab, F-38042 Grenoble, France

[4] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, Russia

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.92.177003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a study of heat and charge transport in Bi2+xSr2-xCuO6+delta focused on the size of the low-temperature linear term of the thermal conductivity at optimal-doping level. In the superconducting state, the magnitude of this term implies a d-wave gap with an amplitude close to what has been reported. In the normal state, recovered by the application of a magnetic field, measurement of this term and residual resistivity yields a Lorenz number L=kappa(Nrho0)/T=1.3+/-0.2L(0). The departure from the value expected by the Wiedemann-Franz law is thus slightly larger than our estimated experimental resolution.

引用

收藏

页码：177003 / 1

页数：4

相关论文

共 31 条

[1] Carrier concentrations in Bi2Sr2-zLazCuO6+δ single crystals and their relation to the Hall coefficient and thermopower [J].

Ando, Y ;

Hanaki, Y ;

Ono, S ;

Murayama, T ;

Segawa, K ;

Miyamoto, N ;

Komiya, S .

PHYSICAL REVIEW B, 2000, 61 (22) :14956-14959

[2] Evidence for field-induced excitations in low-temperature thermal conductivity of Bi2Sr2CaCu2O8 [J].

Aubin, H ;

Behnia, K ;

Ooi, S ;

Tamegai, T .

PHYSICAL REVIEW LETTERS, 1999, 82 (03) :624-627

[3] Low-energy quasiparticles in cuprate superconductors: A quantitative analysis [J].

Chiao, M ;

Hill, RW ;

Lupien, C ;

Taillefer, L ;

Lambert, P ;

Gagnon, R ;

Fournier, P .

PHYSICAL REVIEW B, 2000, 62 (05) :3554-3558

[4] Impurity-induced quasiparticle transport and universal-limit Wiedemann-Franz violation in d-wave superconductors [J].

Durst, AC ;

Lee, PA .

PHYSICAL REVIEW B, 2000, 62 (02) :1270-1290

[5] Electronic thermal conductivity and the Wiedemann-Franz law for unconventional superconductors [J].

Graf, MJ ;

Yip, SK ;

Sauls, JA ;

Rainer, D .

PHYSICAL REVIEW B, 1996, 53 (22) :15147-15161

[6] Measurement of an anisotropic energy gap in single plane Bi2Sr2-xLaxCuO6+delta [J].

Harris, JM ;

White, PJ ;

Shen, ZX ;

Ikeda, H ;

Yoshizaki, R ;

Eisaki, H ;

Uchida, S ;

Si, WD ;

Xiong, JW ;

Zhao, ZX ;

Dessau, DS .

PHYSICAL REVIEW LETTERS, 1997, 79 (01) :143-146

[7] Field-induced thermal metal-to-insulator transition in underdoped La2-xSrxCuO4+δ -: art. no. 197004 [J].

Hawthorn, DG ;

Hill, RW ;

Proust, C ;

Ronning, F ;

Sutherland, M ;

Boaknin, E ;

Lupien, C ;

Tanatar, MA ;

Paglione, J ;

Wakimoto, S ;

Zhang, H ;

Taillefer, L ;

Kimura, T ;

Nohara, M ;

Takagi, H ;

Hussey, NE .

PHYSICAL REVIEW LETTERS, 2003, 90 (19) :4

[8] Breakdown of Fermi-liquid theory in a copper-oxide superconductor [J].

Hill, RW ;

Proust, C ;

Taillefer, L ;

Fournier, P ;

Greene, RL .

NATURE, 2001, 414 (6865) :711-715

[9] SCALING OF THE TEMPERATURE-DEPENDENT HALL-EFFECT IN LA2-XSRXCUO4 [J].

HWANG, HY ;

BATLOGG, B ;

TAKAGI, H ;

KAO, HL ;

KWO, J ;

CAVA, RJ ;

KRAJEWSKI, JJ ;

PECK, WF .

PHYSICAL REVIEW LETTERS, 1994, 72 (16) :2636-2639

[10] Thermal transport in a Luttinger liquid [J].

Kane, CL ;

Fisher, MPA .

PHYSICAL REVIEW LETTERS, 1996, 76 (17) :3192-3195

← 1 2 3 4 →