Absence of spontaneous magnetism associated with a possible time-reversal symmetry breaking state beneath the surface of (110)-oriented YBa2Cu3O7-delta superconducting films



: Saadaoui H, Salman Z, Prokscha T, Suter A, Huhtinen H, Paturi P, Morenzoni E

Publisher: AMER PHYSICAL SOC

: 2013

: Physical Review B

: PHYSICAL REVIEW B

: PHYS REV B

: ARTN 180501

: 18

: 88

: 18

: 5

: 1098-0121

DOI: https://doi.org/10.1103/PhysRevB.88.180501


We report the results of a search for spontaneous magnetism due to a time-reversal symmetry breaking phase in the superconducting state of (110)-oriented YBa2Cu3O7-delta films, expected near the surface in this geometry. Zero field and weak transverse field measurements performed using the low-energy muon spin rotation technique with muons implanted a few nm inside optimally doped YBa2Cu3O7-delta-(110) films show no appearance of spontaneous magnetic fields below the superconducting temperature down to 2.9 K. Our results give an upper limit of similar to 0.02 mT for putative spontaneous internal fields.



Last updated on 2024-26-11 at 23:13