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Title: Superconducting Transition at 38 K in Insulating-Overdoped La2CuO4-La1:64Sr0:36CuO4 Superlattices: Evidence for Interface Electronic Redistribution from Resonant Soft X-Ray Scattering

Abstract

We use resonant soft x-ray scattering (RSXS) to quantify the hole distribution in a superlattice of insulating La{sub 2}CuO{sub 4} (LCO) and overdoped La{sub 2-x}Sr{sub x}CuO{sub 4} (LSCO). Despite its nonsuperconducting constituents, this structure is superconducting with T{sub c} = 38 K. We found that the conducting holes redistribute electronically from LSCO to the LCO layers. The LCO layers were found to be optimally doped, suggesting they are the main drivers of superconductivity. Our results demonstrate the utility of RSXS for separating electronic from structural effects at oxide interfaces.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE SC OFFICE OF SCIENCE (SC)
OSTI Identifier:
1040081
Report Number(s):
BNL-90212-2009-JA
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: MA-509-MACA; KC0201050; TRN: US1202300
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 102; Journal Issue: 10; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DISTRIBUTION; OXIDES; SCATTERING; SUPERCONDUCTIVITY; SUPERLATTICES; SOFT X RADIATION

Citation Formats

Smadici, S, Bozovic, I, Lee, J C. T., Wang, S, Abbamonte, P, Logvenov, G, Gozar, A, and Deville Cavellin, C. Superconducting Transition at 38 K in Insulating-Overdoped La2CuO4-La1:64Sr0:36CuO4 Superlattices: Evidence for Interface Electronic Redistribution from Resonant Soft X-Ray Scattering. United States: N. p., 2009. Web. doi:10.1103/PhysRevLett.102.107004.
Smadici, S, Bozovic, I, Lee, J C. T., Wang, S, Abbamonte, P, Logvenov, G, Gozar, A, & Deville Cavellin, C. Superconducting Transition at 38 K in Insulating-Overdoped La2CuO4-La1:64Sr0:36CuO4 Superlattices: Evidence for Interface Electronic Redistribution from Resonant Soft X-Ray Scattering. United States. https://doi.org/10.1103/PhysRevLett.102.107004
Smadici, S, Bozovic, I, Lee, J C. T., Wang, S, Abbamonte, P, Logvenov, G, Gozar, A, and Deville Cavellin, C. 2009. "Superconducting Transition at 38 K in Insulating-Overdoped La2CuO4-La1:64Sr0:36CuO4 Superlattices: Evidence for Interface Electronic Redistribution from Resonant Soft X-Ray Scattering". United States. https://doi.org/10.1103/PhysRevLett.102.107004.
@article{osti_1040081,
title = {Superconducting Transition at 38 K in Insulating-Overdoped La2CuO4-La1:64Sr0:36CuO4 Superlattices: Evidence for Interface Electronic Redistribution from Resonant Soft X-Ray Scattering},
author = {Smadici, S and Bozovic, I and Lee, J C. T. and Wang, S and Abbamonte, P and Logvenov, G and Gozar, A and Deville Cavellin, C},
abstractNote = {We use resonant soft x-ray scattering (RSXS) to quantify the hole distribution in a superlattice of insulating La{sub 2}CuO{sub 4} (LCO) and overdoped La{sub 2-x}Sr{sub x}CuO{sub 4} (LSCO). Despite its nonsuperconducting constituents, this structure is superconducting with T{sub c} = 38 K. We found that the conducting holes redistribute electronically from LSCO to the LCO layers. The LCO layers were found to be optimally doped, suggesting they are the main drivers of superconductivity. Our results demonstrate the utility of RSXS for separating electronic from structural effects at oxide interfaces.},
doi = {10.1103/PhysRevLett.102.107004},
url = {https://www.osti.gov/biblio/1040081}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 10,
volume = 102,
place = {United States},
year = {Thu Mar 12 00:00:00 EDT 2009},
month = {Thu Mar 12 00:00:00 EDT 2009}
}