d-Wave Order Parameter in Bi2212 from a Phenomenological Model of High Tc Cuprates
نویسنده
چکیده
A phenomenological lattice model of high Tc cuprates including order parameter phase fluctuations is considered within the BCS approximation, to interpret the experimental data from ARPES measurements on Bi2212 samples. A KosterlitzThouless (KT) transition temperature T c is estimated below the mean field transition T c , phase boundaries between competing order parameters of different symmetries are obtained and best model parameters, fitting the ARPES gap of dx2−y2 symmetry, are determined. Variation of T KT c , as a function of the dopant concentration δ, is in qualitative agreement with experiments. PACS numbers: 74.20.Mn, 74.20.Fg, 74.72.-h
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