Model Evidence of a Superconducting State with a Full Energy Gap in Small Cuprate Islands
Artikel i vetenskaplig tidskrift, 2013

We investigate subdominant order parameters stabilizing at low temperatures in nanoscale high-Tc cuprate islands, motivated by the recent observation of a fully gapped state in nanosized YBa2Cu3O7-δ[D. Gustafsson et al., Nature Nanotech. 8, 25 (2013)]. Using complementary quasiclassical and tight-binding Bogoliubov–de Gennes methods, we show on distinctly different properties dependent on the symmetry being dx2-y2 þ is or dx2-y2 þ idxy. We find that a surface-induced dx2-y2 þ is phase creates a global spectroscopic gap which increases with an applied magnetic field, consistent with experimental observation.

Författare

Annica M. Black-Schaffer

Dmitri S. Golubev

Thilo Bauch

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Floriana Lombardi

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

Mikael Fogelström

Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 110 19 197001- 197001

Styrkeområden

Nanovetenskap och nanoteknik

Ämneskategorier

Fysik

Den kondenserade materiens fysik

Fundament

Grundläggande vetenskaper

DOI

10.1103/PhysRevLett.110.197001

Mer information

Senast uppdaterat

2022-04-05