Gauge approach to the specific heat in the normal state of cuprates
arXiv:0807.3630 · doi:10.1103/PhysRevB.78.085119
Abstract
Many experimental features of the electronic specific heat and entropy of high Tc cuprates in the normal state, including the nontrivial temperature dependence of the specific heat coefficient and negative intercept of the extrapolated entropy to T=0 for underdoped cuprates, are reproduced using the spin-charge gauge approach to the t-J model. The entropy turns out to be basically due to fermionic excitations, but with a temperature dependence of the specific heat coefficient controlled by fluctuations of a gauge field coupling them to gapful bosonic excitations. In particular the negative intercept of the extrapolated entropy at T=0 in the pseudogap ``phase'' is attributed to the scalar component of the gauge field, which implements the local no-double occupancy constraint.
arXiv comment5 pages, 5 figures
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Cited by in corpus (4)
- Hole pairing from attraction of opposite chirality spin vortices: Non-BCS superconductivity in Underdoped Cuprates
- A gauge approach to the "pseudogap" phenomenology of the spectral weight in high Tc cuprates
- A non-BCS mechanism for superconductivity in underdoped cuprates via attraction between spin vortices
- Non-BCS superconductivity for underdoped cuprates by spin-vortex attraction