Spontaneous Magnetic Field near a Time-Reversal Symmetry Broken Surface State of YBCO

Abstract

Spatial distributions of spontaneous magnetic fields near a surface of cuprate high-$T_C$ superconductor YBCO with broken time-reversal symmetry are calculated using the Ginzburg-Landau theory derived from the $t-J$ model. It is found that the magnetic field exists in a narrow region inside the superconductor, and it decays quickly outside the surface. Experimental approaches possible to detect such spontaneous magnetic fields are discussed.

6 pages, 4 figures

References in corpus (7)

• Spontaneously broken time-reversal symmetry in high-temperature superconductors
• Absence of broken time reversal symmetry beneath the surface of YBCO films
• Flux phase as possible time-reversal symmetry breaking surface states of high-$T_C$ cuprate superconductors
• Flux Phase as a Possible Ordered State in t-J Model
• Flux Phase in Bilayer $t-J$ Model: Time-Reversal Symmetry Breaking Surface State without Spontaneous Magnetic Field
• Flux Phase in Bilayer $t-J$ Model
• Ginzburg-Landau Theory for Flux Phase and Superconductivity in $t-J$ Model

Cited by in corpus (1)

• Spontaneous Magnetic Field and Local Density of States near a Time-Reversal Symmetry Broken Surface State of YBCO