One-electron spectral functions of the attractive Hubbard model at intermediate coupling

We calculate the one-electron spectral function of the attractive-U Hubbard model in two dimensions. We work in the intermediate coupling and low-density regime and evaluate analytically the self energy. The results are obtained in a framework based on the self-consistent T-matrix approximation. We also calculate the chemical potential of the bound pairs as a function of temperature. On the basis of this calculation we analyze the low-temperature resistivity and specific heat in the normal state of this system. We compare our results with recent beautiful tunneling experiments in the underdoped regime of HTSC-materials.


Published in:
Physica B, 284-288, 447-448
Year:
2000
Publisher:
Elsevier
ISSN:
0921-4526
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2015-04-02, last modified 2018-09-13

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