Electron momentum distribution of a single mobile hole in the t-J model

Details Electron momentum distribution of a single mobile hole in the t-J model Electron momentum distribution of a single mobile hole in the t-J model

2000-01-21

arxiv.org/abs/cond-mat/0001306v1

Physica C, 341-348 (1-4) (2000) 193

Physics

Condensed Matter

Strongly Correlated Electrons

M2S - submitted to Physica C

Scientific paper

We investigate the electron momentum distribution function (EMDF) for the two-dimensional t-J model. The results are based on the self-consistent Born approximation (SCBA) for the self-energy and the wave function. In the Ising limit of the model we give the results in a closed form, in the Heisenberg limit the results are obtained numerically. An anomalous momentum dependence of EMDF is found and the anomaly is in the lowest order in number of magnons expressed analitycally. We interpret the anomaly as a fingerprint of an emerging large Fermi surface coexisting with hole pockets.

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