Details

Autor(en) / Beteiligte

• Nagai, Yuki
• Ota, Yukihiro
• Tanaka, K.

Titel

Time-reversal symmetry breaking phase and gapped surface states in d-wave nanoscale superconductors

Ist Teil von

• Journal of physics. Conference series, 2018-03, Vol.969 (1), p.12039

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2018

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We solve the Bogoliubov-de Gennes equations self-consistently for d-wave superconductors with [110] surfaces. We find spontaneous breaking of time-reversal symmetry (TRS) caused by the spontaneous occurrence of a complex order parameter with an extended s-wave symmetry along the [110] surfaces. In the TRS-breaking phase, the d-wave order parameter itself becomes complex. We also show that vortex-antivortex pairs can appear along the [110] surfaces of nanoribbons. These pairs are detectable with surface sensitive probes.