R. Bel

activity

20032005

collaborators

7 papers

cond-mat.str-el2005

Evidence for a new magnetic field scale in CeCoIn5

I. Sheikin, H. Jin, R. Bel +6

The Nernst coefficient of CeCoIn5 displays a distinct anomaly at H_K ~ 23 T. This feature is reminiscent of what is observed at 7.8 T in CeRu2Si2, a well-established case of metama…

cond-mat.supr-con2005

Heat transport in Bi_{2+x}Sr_{2-x}CuO_{6+δ}: departure from the Wiedemann-Franz law in the vicinity of the metal-insulator transition

Cyril Proust, Kamran Behnia, Romain Bel +2

We present a study of heat transport in the cuprate superconductor Bi_{2+x}Sr_{2-x}CuO_{6+δ} at subkelvin temperatures and in magnetic fields as high as 25T. In several samples wit…

cond-mat.str-el2004

Thermal transport in the hidden-order state of URu $_{2}$ Si $_{2}$

K. Behnia, R. Bel, Y. Kasahara +9

We present a study of thermal conductivity in the normal state of the heavy-fermion superconductor URu $_{2}$ Si $_{2}$ . Ordering at 18K leads to a steep increase in thermal conductiv…

cond-mat.str-el2004

Thermoelectricity of URu $_{2}$ Si $_{2}$ : giant Nernst effect in the hidden-order state

Romain Bel, Hao Jin, Kamran Behnia +2

We present a study of Nernst and Seebeck coefficients in the heavy-fermion compound URu $_{2}$ Si $_{2}$ , which hosts a phase transition of unsettled origin. A giant Nernst signal of…

cond-mat.str-el2003

Giant Nernst effect in a Kondo lattice close to a quantum critical point

R. Bel, K. Behnia, Y. Nakajima +5

We present a study of Nernst and Seebeck coefficients of the heavy-fermion superconductor CeCoIn $_{5}$ . Below 18 K, concomitant with a field-dependent Seebeck coefficient, a large…

cond-mat.supr-con2003

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

Romain Bel, Kamran Behnia, Cyril Proust +3

We present a study of heat and charge transport in Bi $_{2 + x}$ Sr $_{2 - x}$ CuO $_{6 + δ}$ focused on the size of the low-temperature linear term of the thermal conductivity at optimal dop…