Numerical study of quantum vortex phase diagram in two-dimensional superconductors

Kiyokazu Myojin; Ryusuke Ikeda; Shigeru Koikegami

doi:10.1103/PhysRevB.78.014508

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Numerical study of quantum vortex phase diagram in two-dimensional superconductors

Kiyokazu Myojin, Ryusuke Ikeda, Shigeru Koikegami

DOI 10.1103/PhysRevB.78.014508 · Physical Review B

T1

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Abstract

Vortex phase diagrams of weakly disordered two-dimensional (2D) superconductors under a magnetic field perpendicular to the plane are numerically studied based on a recent development on the corresponding issue in three-dimensional (3D) systems with a low density of columnar defects at high temperatures. By examining the field dependences of magnetic quantities and the glass correlation, two consecutive first-order transitions (FOTs) are found to occur in weakly disordered cases even at low but finite temperatures, and the lower FOT is identified with a remnant of the melting transition of Bragg-Bose glass at zero temperature. The resulting phase diagram is discussed in relation to a FOT-like behavior found in superconducting thin films.

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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
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
MoGe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown