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Phys. Rev. B 78, 161103(R) (2008) [4 pages]

Transport anomalies across the quantum limit in semimetallic Bi0.96Sb0.04

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Aritra Banerjee1,*, Benoît Fauqué1, Koichi Izawa2,3, Atsushi Miyake2, Ilya Sheikin4, Jacques Flouquet2, Bertrand Lenoir5, and Kamran Behnia1
1LPEM (UPMC-CNRS), Ecole Supérieure de Physique et de Chimie Industrielles, 75231 Paris Cedex, France
2DRFMC/SPSMS, Commissariat à l’Energie Atomique, 38042 Grenoble Cedex, France
3Graduate School of Science and Engineering, Tokyo Institute of Technology, Tokyo 152-8551, Japan
4Grenoble High Magnetic Field Laboratory, CNRS, BP 166, 38042 Grenoble, France
5Laboratoire de Physique des Matériaux, CNRS, Nancy Université, Ecole des Mines de Nancy, Parc de Saurupt, 54042 Nancy Cedex, France

Received 9 September 2008; published 31 October 2008

See accompanying Physics Synopsis

We report on a study of electronic transport in semimetallic Bi0.96Sb0.04. At zero field, the system is a very dilute Fermi liquid displaying a T2 resistivity with an enhanced prefactor. Quantum oscillations in resistivity as well as in Hall, Nernst, and Seebeck responses of the system are detectable and their period quantifies the shrinking of the Fermi surface with antimony doping. For a field along the trigonal axis, the quantum limit was found to occur at a field as low as 3 T. An ultraquantum anomaly at twice this field was detected in both charge transport and Nernst response. Its origin appears to lie beyond the one-particle picture and linked to unidentified many-body effects.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.78.161103
DOI:
10.1103/PhysRevB.78.161103
PACS:
71.70.Di, 71.18.+y, 72.15.Jf

*On leave from Department of Physics, University of Calcutta, 92, A P C Roy Road, Kolkata-700.009, India.

 
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