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Instabilities of a Fermi Gas with Nested Fermi Surfaces

Journal Article · · Annalen der Physik (Leipzig)
 [1]
  1. Department of Physics Florida State University Tallahassee Florida 32306

Abstract

The nesting of the Fermi surfaces of an electron and a hole pocket separated by a vector Q commensurate with the lattice in conjunction with the interaction between the quasiparticles can give rise to a rich phase diagram. Of particular importance is itinerant antiferromagnetic order in the context of pnictides and heavy fermion compounds. By mismatching the nesting the order can gradually be suppressed and as the Néel temperature tends to zero a quantum critical point is obtained. A superconducting dome above the quantum critical point can be induced by the transfer of pairs of electrons between the pockets. The conditions under which such a dome arises are studied. In addition numerous other phases may arise, e.g. charge density waves, non‐Fermi liquid behavior, non‐ s ‐wave superconductivity, Pomeranchuk instabilities of the Fermi surface, nematic order, and phases with persistent orbital currents.

Sponsoring Organization:
USDOE
Grant/Contract Number:
FG02-98ER45707
OSTI ID:
1410129
Alternate ID(s):
OSTI ID: 1537441
OSTI ID: 22691079
Journal Information:
Annalen der Physik (Leipzig), Journal Name: Annalen der Physik (Leipzig) Journal Issue: 1 Vol. 530; ISSN 0003-3804
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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