Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-11-05
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 3 EPS figures, REVTeX, To be published in Phys. Rev. B, Vol. 59, Num. 3 (15 Jan. 1999)
Scientific paper
10.1103/PhysRevB.59.1840
We examine the effect of the magnetic frustration J' on the single-hole spectral function in the t-t'-t''-J model. At zero temperature, the exact diagonalization (ED) and the self-consistent Born approximation (SCBA) methods are used. We find that the frustration suppresses the quasiparticle (QP) weight at small momentum k, whereas the QP peak at k=(pi/2,pi/2) remains sharp. We also show the temperature dependence of the single-hole spectral function by using the ED method. It is found that the lineshapes at (pi/2,0) and (pi/2,pi/2) show different temperature dependence. These findings are consistent with the angle-resolved photoemission data on Sr2CuO2Cl2, and indicate the importance of the magnetic frustration on the electronic states of the insulating cuprates.
Maekawa Sasamichi
Shibata Yu.
Tohyama Takami
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