Vortex structure in a d-wave superconductor obtained by a confinement transition from the pseudogap metal
Jia-Xin Zhang, Subir Sachdev
DOI 10.1103/PhysRevB.110.235120 · Physical Review B
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Abstract
We compute the structure of flux h/(2e) vortices in a d-wave superconductor, which emerges from a higher-temperature pseudogap metal. Such a transition is described by a continuum theory of the Higgs condensation of two flavors of charge e bosons, which are fundamentals of an emergent SU(2) gauge field. Period-2 charge order is present near the vortex center. Upon coupling the electrons to the superconducting and charge order parameters, we find that the electronic local density of states does not have a zero-bias peak, in contrast to BCS theory. But there are subgap peaks at positive and negative bias, and these exhibit antiphase periodic spatial modulations, similar to observations in scanning tunneling microscopy experiments in the underdoped cuprates [K. Matsuba et al., J. Phys. Soc. Jpn. 76, 063704 (2007)].
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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