Nernst Response of the Landau Tubes in Graphite across the Quantum Limit

Benoît Fauqué, Zengwei Zhu, Tim Murphy, and Kamran Behnia

Phys. Rev. Lett. 106, 246405 – Published 17 June 2011

Abstract

We report on a study of the Nernst effect in graphite extended up to 45 T. The Nernst response sharply peaks when a Landau tube is squeezed inside the thermally fuzzy Fermi surface and presents a temperature-independent fixed point when the tube flattens to a single ring. Beyond the quantum limit, the onset of the field-induced phase transition leads to a drastic drop in the Nernst response signaling the sudden vanishing of Landau tubes. The magnitude of this drop suggests the destruction of multiple Landau tubes possibly as a result of simultaneous nesting of the electron and hole pockets.

Received 7 January 2011

DOI:https://doi.org/10.1103/PhysRevLett.106.246405

Authors & Affiliations

Benoît Fauqué^1,2, Zengwei Zhu^1,3, Tim Murphy⁴, and Kamran Behnia¹

¹LPEM (UPMC-CNRS), Ecole Supérieure de Physique et de Chimie Industrielles, 75005 Paris, France
²H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom
³Department of Physics, Zhejiang University, Hangzhou 310027, China
⁴National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, USA