Tunable coupling of two-dimensional superconductors in bilayer SrTiO 3 heterostructures

Hisashi Inoue, Minu Kim, Christopher Bell, Yasuyuki Hikita, Srinivas Raghu, Harold Y. Hwang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Interlayer coupling effects between high mobility two-dimensional superconductors are studied in bilayer δ-doped SrTiO3 heterostructures. By tuning the undoped SrTiO3 spacer layer between the dopant planes, clear tunable coupling is demonstrated in the variation of the sheet carrier density, Hall mobility, superconducting transition temperature, and the temperature and angle dependencies of the superconducting upper critical field. Systematic variation is found between one effective (merged) two-dimensional superconductor to two decoupled two-dimensional superconductors. In the intermediate coupled regime, a crossover is observed due to coupling arising from intersubband interactions.

Original languageEnglish
Article number241104
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume88
Issue number24
DOIs
Publication statusPublished - 2013 Dec 5
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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