2008
DOI: 10.1016/j.jpcs.2008.06.073
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Cuprate superconductors in the vicinity of a Pomeranchuk instability

Abstract: We propose that cuprate superconductors are in the vicinity of a spontaneous d-wave type Fermi surface symmetry breaking, often called a d-wave Pomeranchuk instability. This idea is explored by means of a comprehensive study of magnetic excitations within the slave-boson mean-field theory of the t-J model. We can naturally understand the pronounced xy anisotropy of magnetic excitations in untwinned YBa 2 Cu 3 O y and the sizable change of incommensurability of magnetic excitations at the transition temperature… Show more

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Cited by 2 publications
(1 citation statement)
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“…A crucial insight obtained in theory is that cuprates can be close to the electronic nematic instability. 42,43,155) The nematic order is driven by the J-term and the Coulomb repulsion on a square lattice and tends to be enhanced in the underdoped region 43,[53][54][55] as well as around van Hove filling 43,44) in the hole-doped case; the nematic tendency is weak in the electron-doped case. 61) The nematic order is one of competing orders and can be preempted by antiferromagnetism and superconductivity.…”
Section: Discussionmentioning
confidence: 99%
“…A crucial insight obtained in theory is that cuprates can be close to the electronic nematic instability. 42,43,155) The nematic order is driven by the J-term and the Coulomb repulsion on a square lattice and tends to be enhanced in the underdoped region 43,[53][54][55] as well as around van Hove filling 43,44) in the hole-doped case; the nematic tendency is weak in the electron-doped case. 61) The nematic order is one of competing orders and can be preempted by antiferromagnetism and superconductivity.…”
Section: Discussionmentioning
confidence: 99%