TY - JOUR
T1 - Tunable coupling of two-dimensional superconductors in bilayer SrTiO 3 heterostructures
AU - Inoue, Hisashi
AU - Kim, Minu
AU - Bell, Christopher
AU - Hikita, Yasuyuki
AU - Raghu, Srinivas
AU - Hwang, Harold Y.
PY - 2013/12/5
Y1 - 2013/12/5
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.88.241104
DO - 10.1103/PhysRevB.88.241104
M3 - Article
AN - SCOPUS:84890631604
VL - 88
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 0163-1829
IS - 24
M1 - 241104
ER -