Electrostatic interface tuning in correlated superconducting heterostructures

Details Electrostatic interface tuning in correlated superconducting heterostructures Electrostatic interface tuning in correlated superconducting heterostructures

2005-05-30

arxiv.org/abs/cond-mat/0505714v2

Physical Review B 72, 174516 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 6 figures, to appear in Physical Review B

Scientific paper

10.1103/PhysRevB.72.174516

An electrostatic field, which is applied to a gated high-temperature superconducting (HTSC) film, is believed to affect the film similar to charge doping. Analyzing the pairing in terms of a t-J model, we show that a coupling to electric dipoles and phonons at the interface of film and dielectric gate localizes the injected charge and leads to a superconductor-insulator transition. This results in a dramatic modification of the doping dependent phase diagram close to and above the optimal doping which is expected to shed light on recent electric field-effect experiments with HTSC cuprates.

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