Breakdown of the Bardeen–Cooper–Schrieffer ground state at a quantum phase transition

R. Jaramillo, Yejun Feng, J. C. Lang, Z. Islam, G. Srajer, P. B. Littlewood, D. B. McWhan and T. F. Rosenbaum ()
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R. Jaramillo: The University of Chicago, Chicago, Illinois 60637, USA
Yejun Feng: The University of Chicago, Chicago, Illinois 60637, USA
J. C. Lang: The Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
Z. Islam: The Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
G. Srajer: The Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
P. B. Littlewood: Cavendish Laboratory, University of Cambridge
D. B. McWhan: Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
T. F. Rosenbaum: The University of Chicago, Chicago, Illinois 60637, USA

Nature, 2009, vol. 459, issue 7245, 405-409

Abstract: Chromium goes exotic Quantum phase transitions are attracting increasing attention as the conceptual link between conventional and exotic states of quantum matter: they have been implicated, for example, in the properties of high-temperature superconductors. But few model systems have been identified in which these enigmatic transitions can be readily studied and understood. Now Jaramillo et al. reveal that placing simple elemental chromium under pressure at low temperatures suppresses its normal magnetic state, and gives direct experimental access to the underlying quantum phase transition responsible for these changes.

Date: 2009
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DOI: 10.1038/nature08008

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