Proximity effect in a heterostructure of a high-Tc superconductor with a topological insulator from dynamical mean field theory
Xiancong Lu, D. Sénéchal
DOI 10.1103/PhysRevB.101.054512 · Physical Review B
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Abstract
We investigate the proximity effect in a heterostructure of the topological insulator (TI) Bi2Se3 deposited on the high-temperature superconductor (HTSC) material Bi2Sr2CaCu2O8+δ. The latter is described by the one-band Hubbard model and is treated with cluster dynamical mean field theory (CDMFT), the topological insulator (TI) layers being included via the CDMFT self-consistency loop. The penetration of superconductivity into the TI depends on the position of the Fermi level with respect to the TI gap. We illustrate the back action of the TI layer on the HTSC layer, in particular the gradual disappearance of Mott physics with increasing tunneling amplitude.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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