d-Wave Order Parameter in Bi2212 from a Phenomenological Model of High T$_c$ Cuprates

Details d-Wave Order Parameter in Bi2212 from a Phenomenological Model of High T$_c$ Cuprates d-Wave Order Parameter in Bi2212 from a Phenomenological Model of High T$_c$ Cuprates

1996-06-13

arxiv.org/abs/cond-mat/9606090v1

Physics

Condensed Matter

Latex file, 11 output pages, 5 figures (available from the author on request)

Scientific paper

10.1016/S0375-9601(96)00887-0

A phenomenological lattice model of high $T_c$ cuprates including order parameter phase fluctuations is considered within the BCS approximation, to interpret the experimental data from ARPES measurements on Bi2212 samples. A Kosterlitz-Thouless (KT) transition temperature $T_c^{KT}$ is estimated below the mean field transition $T_c^{MF}$, phase boundaries between competing order parameters of different symmetries are obtained and best model parameters, fitting the ARPES gap of $d_{x^2-y^2}$ symmetry, are determined. Variation of $T_c^{KT}$, as a function of the dopant concentration $\delta$, is in qualitative agreement with experiments.

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