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Phys. Rev. B 78, 035131 (2008) [8 pages]

Symmetry-breaking Fermi surface deformations from central interactions in two dimensions

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Jorge Quintanilla1,*, Masudul Haque2, and A. J. Schofield3
1ISIS Spallation Facility, STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot OX11 0QX, United Kingdom
2Max Planck Institute for Physics of Complex Systems, Nöthnitzer Strasse 38, Dresden, Germany
3School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, United Kingdom

Received 10 June 2008; revised 25 June 2008; published 29 July 2008

We present a mean-field theory of the Pomeranchuk instability in two dimensions, starting from a generic central interaction potential described in terms of a few microscopic parameters. For a significant range of parameters, the instability is found to be pre-empted by a first-order quantum phase transition. We provide the ground-state phase diagram in terms of our generic parameters.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.78.035131
DOI:
10.1103/PhysRevB.78.035131
PACS:
71.10.Hf, 71.10.Ay, 71.30.+h

*j.quintanilla@rl.ac.uk

 
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