Microscopic origin of the Dynes parameter Γ of the LaAlO3–SrTiO3 interface superconductor
Hans Boschker, Evangelos Fillis-Tsirakis, Christoph Richter, Ding Zhang, Jurgen Smet, Lukas Kuerten
DOI 10.1103/PhysRevB.102.134506 · 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
The superconducting density of states of the two-dimensional electron system at the LaAlO3–SrTiO3 interface exhibits broad quasiparticle peaks that are well described by the Dynes parameter Γ. We measured Γ in a wide range of temperatures and gate voltages using tunneling spectroscopy. Γ exhibits a Tq temperature dependence, with q=2.2±0.2. We discuss several interpretations of Γ and conclude that Γ is an intrinsic parameter of the superconducting state that quantifies the effect of the pair-breaking processes in the superconductor. The strong temperature dependence at low temperatures rules out inelastic electron scattering and magnetic scattering as the origin of the pair breaking. We find that Γ can be explained by interband scattering and by scattering in a superconductor with nodes in the order parameter.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaAlO3-SrTiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 0.27 | Pressure not reported | onset |
Similar papers
Signatures of unconventional superconductivity in the LaAlO3/SrTiO3 two-dimensional system
similarity 0.89D. Stornaiuolo et al.
Source status unknown — claims are unverified
Interlayer valence bonds and two-component theory for high-Tc superconductivity of La3Ni2O7 under pressure
similarity 0.87Yi-feng Yang et al.
Source status unknown — claims are unverified
Absence of localized 5d1 electrons in KTaO3 interface superconductors
similarity 0.87Xinqiang Cai et al.
Source status unknown — claims are unverified
Dynes-like superconductivity in thin Al films in parallel magnetic fields
similarity 0.86Dušan Kavický & Richard Hlubina
Source status unknown — claims are unverified
Optimally Tensile Strained La3Ni2O7 Films as Candidate High-Temperature Superconductors on Designer Substrates Ba1−xSrxO and SrO-Terminated SrTiO3
similarity 0.86Liangliang Liu et al.
Source status unknown — claims are unverified
Multiband theory of superconductivity at the LaAlO3/SrTiO3 interface
similarity 0.86N. Mohanta & A. Taraphder
Source status unknown — claims are unverified