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Fermi Surface in La2CuO4-σ Determine by Positron 2D-ACAR

Published online by Cambridge University Press:  28 February 2011

Shoichiro Tanigawa ,
Yoji Mizuhara ,
Yoshikazu Hidaka ,
Migaku Oda ,
Minoru Suzuki  and
Toshiaki Murakami
Shoichiro Tanigawa
Affiliation:
Institute of Materials Science, University of Tsukuba, Sakura-mura, Ibaraki 305, Japan
Yoji Mizuhara
Affiliation:
Institute of Materials Science, University of Tsukuba, Sakura-mura, Ibaraki 305, Japan
Yoshikazu Hidaka
Affiliation:
NTT Electrical Communications Laboratories, 162 Tokai, Ibaraki 319–11, Japan
Migaku Oda
Affiliation:
NTT Electrical Communications Laboratories, 162 Tokai, Ibaraki 319–11, Japan
Minoru Suzuki
Affiliation:
NTT Electrical Communications Laboratories, 162 Tokai, Ibaraki 319–11, Japan
Toshiaki Murakami
Affiliation:
NTT Electrical Communications Laboratories, 162 Tokai, Ibaraki 319–11, Japan
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Abstract

The topology of the Fermi surface in La2CuO4-σ is determined by two dimensional angular correlation measurements of annihilation radiations (2D-ACAR) at room temperature. The determined Fermi surface is two dimensional and has a slender electron pillar along ΓZ and two kinds of hole pillars along PX and along NN direction parallel to ΓZ, respectively, in the Bradley and Cracknell notation modified by Yu, Freeman and Xu. It is concluded that the Fermi surface is not a simple half filled one and this compound should be metallic at least at room temperature in the band picture.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 57
Copyright
Copyright © Materials Research Society 1988

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References

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