Next Article in Journal
A New Generation of X-ray Baggage Scanners Based on a Different Physical Principle
Next Article in Special Issue
Nanorod Self-Assembly in High Jc YBa2Cu3O7−x Films with Ru-Based Double Perovskites
Previous Article in Journal
Multi-Echo-Based Echo-Planar Spectroscopic Imaging Using a 3T MRI Scanner
Open AccessArticle

The Origin of Tc Enhancement in Heterostructure Cuprate Superconductors

Department of Physics, California Institute of Technology, 1200 E. California Blvd, MC114-36, Pasadena, CA 91125, USA
Department of Physics, McGill University, Montreal, Quebec H3A 2T8, Canada
Author to whom correspondence should be addressed.
Materials 2011, 4(10), 1835-1845;
Received: 2 August 2011 / Revised: 24 September 2011 / Accepted: 9 October 2011 / Published: 17 October 2011
(This article belongs to the Special Issue New High Tc Superconductor)
Recent experiments on heterostructures composed of two or more films of cuprate superconductors of different oxygen doping levels have shown a remarkable Tc enhancement (up to 50%) relative to single compound films. We provide a simple explanation of the enhancement which arises naturally from a collection of experimental works. We show that the enhancement could be caused by a structural change in the lattice, namely an increase in the distance of the apical oxygen from the copper-oxygen plane. This increase modifies the effective off-site interaction in the plane which in turn enhances the d-wave superconductivity order parameter. To illustrate this point we study the extended Hubbard model using the fluctuation exchange approximation. View Full-Text
Keywords: high Tc superconductivity; heterostructures; cuprates high Tc superconductivity; heterostructures; cuprates
Show Figures

Figure 1

MDPI and ACS Style

Bergman, D.L.; Pereg-Barnea, T. The Origin of Tc Enhancement in Heterostructure Cuprate Superconductors. Materials 2011, 4, 1835-1845.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

Only visits after 24 November 2015 are recorded.
Back to TopTop