Effective thickness of two-dimensional superconductivity in a tunable triangular quantum well of SrTiO3
K. Ueno, T. Nojima, S. Yonezawa, M. Kawasaki, Y. Iwasa, Y. Maeno
DOI 10.1103/PhysRevB.89.020508 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We report two-dimensionality and effective thickness of the superconductivity of a SrTiO single-crystal surface induced by electric double-layer gating. The carrier density was tuned from 3 × 10 to 1.1 × 10 cm by gating, where superconductivity appears with Tc of around 0.4 K. Typical two-dimensional behavior perfectly described by the Ginzburg–Landau equation was observed in the angular and temperature dependence of the upper critical magnetic field. The effective thickness of the superconducting layer remains nearly invariant, ranging from 11 to 13 nm, with increasing charge carrier density. This invariance contradicts the expected reduction in the thickness of the accumulation layer in a triangular quantum well model. This unexpected invariance of the superconducting layer thickness is probably a unique nature for a two-dimensional electron system in the incipient ferroelectric SrTiO.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SrTiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.39 | Pressure not reported | midpoint |
| SrTiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.34 | Pressure not reported | midpoint |
| KTaO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Role of locally polar regions in the superconductivity of SrTiO3
similarity 0.95Salva Salmani-Rezaie et al.
Source status unknown — claims are unverified
Critical Doping for the Onset of a Two-Band Superconducting Ground State in SrTiO3−δ
similarity 0.95Xiao Lin et al.
Source status unknown — claims are unverified
Intrinsic spin-orbit coupling in superconducting δ-doped SrTiO3 heterostructures
similarity 0.95M. Kim et al.
Source status unknown — claims are unverified
Superconducting Tunneling Spectroscopy of Spin-Orbit Coupling and Orbital Depairing in Nb:SrTiO3
similarity 0.95Adrian G. Swartz et al.
Source status unknown — claims are unverified
Electric field tuning of superconductivity in lanthanum-doped strontium titanate field-effect transistors
similarity 0.95Feng Pan & Charles T. Rogers
Source status unknown — claims are unverified
Tunable coupling of two-dimensional superconductors in bilayer SrTiO3 heterostructures
similarity 0.94Hisashi Inoue et al.
Source status unknown — claims are unverified