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Title: Anomalous Fermi-Surface Dependent Pairing in a Self-Doped High-T(c) Superconductor

Abstract

We report the discovery of a self-doped multilayer high T{sub c} superconductor Ba{sub 2}Ca{sub 3}Cu{sub 4}O{sub 8}F{sub 2} (F0234) which contains distinctly different superconducting gap magnitudes along its two Fermi-surface sheets. While formal valence counting would imply this material to be an undoped insulator, it is a self-doped superconductor with a T{sub c} of 60 K, possessing simultaneously both electron- and hole-doped Fermi-surface sheets. Intriguingly, the Fermi-surface sheet characterized by the much larger gap is the electron-doped one, which has a shape disfavoring two electronic features considered to be important for the pairing mechanism: the van Hove singularity and the antiferromagnetic ({pi}/{alpha}, {pi}/{alpha}) scattering.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
899559
Report Number(s):
SLAC-PUB-12340
TRN: US200709%%62
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys.Rev.Lett.97:236401,2006
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; FERMI LEVEL; HIGH-TC SUPERCONDUCTORS; VALENCE; BARIUM OXIDES; CALCIUM OXIDES; COPPER OXIDES; BARIUM FLUORIDES; CALCIUM FLUORIDES; COPPER FLUORIDES; DOPED MATERIALS; Other,OTHER

Citation Formats

Chen, Yulin, Iyo, Akira, Yang, Wanli, Zhou, Xingjiang, Lu, Donghui, Eisaki, Hiroshi, Devereaux, Thomas P., Hussain, Zahid, Shen, Z.-X., and /Stanford U., Phys. Dept. /SLAC, SSRL /AIST, Tsukuba /Waterloo U. /LBNL, ALS. Anomalous Fermi-Surface Dependent Pairing in a Self-Doped High-T(c) Superconductor. United States: N. p., 2007. Web.
Chen, Yulin, Iyo, Akira, Yang, Wanli, Zhou, Xingjiang, Lu, Donghui, Eisaki, Hiroshi, Devereaux, Thomas P., Hussain, Zahid, Shen, Z.-X., & /Stanford U., Phys. Dept. /SLAC, SSRL /AIST, Tsukuba /Waterloo U. /LBNL, ALS. Anomalous Fermi-Surface Dependent Pairing in a Self-Doped High-T(c) Superconductor. United States.
Chen, Yulin, Iyo, Akira, Yang, Wanli, Zhou, Xingjiang, Lu, Donghui, Eisaki, Hiroshi, Devereaux, Thomas P., Hussain, Zahid, Shen, Z.-X., and /Stanford U., Phys. Dept. /SLAC, SSRL /AIST, Tsukuba /Waterloo U. /LBNL, ALS. Mon . "Anomalous Fermi-Surface Dependent Pairing in a Self-Doped High-T(c) Superconductor". United States. doi:. https://www.osti.gov/servlets/purl/899559.
@article{osti_899559,
title = {Anomalous Fermi-Surface Dependent Pairing in a Self-Doped High-T(c) Superconductor},
author = {Chen, Yulin and Iyo, Akira and Yang, Wanli and Zhou, Xingjiang and Lu, Donghui and Eisaki, Hiroshi and Devereaux, Thomas P. and Hussain, Zahid and Shen, Z.-X. and /Stanford U., Phys. Dept. /SLAC, SSRL /AIST, Tsukuba /Waterloo U. /LBNL, ALS},
abstractNote = {We report the discovery of a self-doped multilayer high T{sub c} superconductor Ba{sub 2}Ca{sub 3}Cu{sub 4}O{sub 8}F{sub 2} (F0234) which contains distinctly different superconducting gap magnitudes along its two Fermi-surface sheets. While formal valence counting would imply this material to be an undoped insulator, it is a self-doped superconductor with a T{sub c} of 60 K, possessing simultaneously both electron- and hole-doped Fermi-surface sheets. Intriguingly, the Fermi-surface sheet characterized by the much larger gap is the electron-doped one, which has a shape disfavoring two electronic features considered to be important for the pairing mechanism: the van Hove singularity and the antiferromagnetic ({pi}/{alpha}, {pi}/{alpha}) scattering.},
doi = {},
journal = {Phys.Rev.Lett.97:236401,2006},
number = ,
volume = ,
place = {United States},
year = {Mon Feb 12 00:00:00 EST 2007},
month = {Mon Feb 12 00:00:00 EST 2007}
}