High temperature interfacial superconductivity
Abstract
High-temperature superconductivity confined to nanometer-scale interfaces has been a long standing goal because of potential applications in electronic devices. The spontaneous formation of a superconducting interface in bilayers consisting of an insulator (La.sub.2CuO.sub.4) and a metal (La.sub.1-xSr.sub.xCuO.sub.4), neither of which is superconducting per se, is described. Depending upon the layering sequence of the bilayers, T.sub.c may be either .about.15 K or .about.30 K. This highly robust phenomenon is confined to within 2-3 nm around the interface. After exposing the bilayer to ozone, T.sub.c exceeds 50 K and this enhanced superconductivity is also shown to originate from a 1 to 2 unit cell thick interfacial layer. The results demonstrate that engineering artificial heterostructures provides a novel, unconventional way to fabricate stable, quasi two-dimensional high T.sub.c phases and to significantly enhance superconducting properties in other superconductors. The superconducting interface may be implemented, for example, in SIS tunnel junctions or a SuFET.
- Inventors:
-
- Mount Sinai, NY
- Port Jefferson Station, NY
- Port Jefferson, NY
- Issue Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1055453
- Patent Number(s):
- 8204564
- Application Number:
- US patent applicaiton 12/264,742
- Assignee:
- Brookhaven Science Associates, LLC (Upton, NY)
- Patent Classifications (CPCs):
-
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- DOE Contract Number:
- AC02-98CH10886
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Bozovic, Ivan, Logvenov, Gennady, and Gozar, Adrian Mihai. High temperature interfacial superconductivity. United States: N. p., 2012.
Web.
Bozovic, Ivan, Logvenov, Gennady, & Gozar, Adrian Mihai. High temperature interfacial superconductivity. United States.
Bozovic, Ivan, Logvenov, Gennady, and Gozar, Adrian Mihai. Tue .
"High temperature interfacial superconductivity". United States. https://www.osti.gov/servlets/purl/1055453.
@article{osti_1055453,
title = {High temperature interfacial superconductivity},
author = {Bozovic, Ivan and Logvenov, Gennady and Gozar, Adrian Mihai},
abstractNote = {High-temperature superconductivity confined to nanometer-scale interfaces has been a long standing goal because of potential applications in electronic devices. The spontaneous formation of a superconducting interface in bilayers consisting of an insulator (La.sub.2CuO.sub.4) and a metal (La.sub.1-xSr.sub.xCuO.sub.4), neither of which is superconducting per se, is described. Depending upon the layering sequence of the bilayers, T.sub.c may be either .about.15 K or .about.30 K. This highly robust phenomenon is confined to within 2-3 nm around the interface. After exposing the bilayer to ozone, T.sub.c exceeds 50 K and this enhanced superconductivity is also shown to originate from a 1 to 2 unit cell thick interfacial layer. The results demonstrate that engineering artificial heterostructures provides a novel, unconventional way to fabricate stable, quasi two-dimensional high T.sub.c phases and to significantly enhance superconducting properties in other superconductors. The superconducting interface may be implemented, for example, in SIS tunnel junctions or a SuFET.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 19 00:00:00 EDT 2012},
month = {Tue Jun 19 00:00:00 EDT 2012}
}
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