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On the Dynamical Spin Susceptibility of Paramagnetic La2CuO4

Published online by Cambridge University Press:  16 February 2011

H. Winter ,
Z. Szotek  and
W. M. Temmerman
H. Winter
Affiliation:
Kemforschungszentrum Karlsruhe, INFP, P.O. Box 3640, D-7500 Karlsruhe, Federal Republic of Germany
Z. Szotek
Affiliation:
SERC Daresbury Laboratory, Warrington WA4 4AD, United Kingdom
W. M. Temmerman
Affiliation:
SERC Daresbury Laboratory, Warrington WA4 4AD, United Kingdom
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Abstract

The self-consistent one-electron wave functions and energy bands obtained by the LMTO-ASA method within the local density approximation (LDA) are used to calculate the wave vector and frequency dependent non-interacting spin susceptibility of paramagnetic La2CuO4 in the body-centred tetragonal (bct) structure. We show that the tendency towards the antiferromagnetic instability is strongly dependent on the effects of the matrix elements which lead to a substantial depression of the susceptibility, especially near the X-point. The Fermi surface nesting properties, although important for the susceptibility, are by far not sufficient for the instability and the interband transitions turn out to be of great significance. Our results indicate that the susceptibility is at least 3 times too small to drive this system through a transition to the antiferromagnetic state, and we discuss possible reasons for this failure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 193: Symposium Q – Atomic Scale Calculations of Structure in Materials , 1990 , 3
Copyright
Copyright © Materials Research Society 1990

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References

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