Superconductivity in a planar field theory through the Kosterlitz-Thouless mechanism

R. MacKenzie; P. K. Panigrahi; S. Sakhi

doi:10.1103/PhysRevB.48.3892

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Superconductivity in a planar field theory through the Kosterlitz-Thouless mechanism

R. MacKenzie, P. K. Panigrahi, S. Sakhi

DOI 10.1103/PhysRevB.48.3892 · Physical Review B

T1

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Abstract

We present a (2+1)-dimensional model that exhibits superconductivity in the strong-coupling regime through the Kosterlitz-Thouless (KT) mechanism, with a nonzero critical temperature Tc. The model has three phases: a confined-vortex phase, which is superconducting at low temperatures, an intermediate-temperature phase with deconfined vortices, and an unbroken-symmetry phase at high temperatures. The ground state does not break P or T and the ratio of the energy gap to Tc is bigger than the conventional BCS value.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La3Ni2O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
(Y0.8Pr0.2)Ba2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
CsV3Sb5-xSnx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown