Enhancement of pairing correlation by t' in the two-dimensional extended t-J model.
نویسندگان
چکیده
We investigate the effects of the next-nearest-neighbor (t') and the third-nearest-neighbor (t") hopping terms on superconductivity correlation in the 2D hole-doped extended t-J model based on the variational Monte Carlo, mean-field calculation and exact diagonalization method. Despite the diversity of the methods employed, the results all point to a consistent conclusion: While the d-wave superconductivity correlation is slightly suppressed by t' and t" in underdoped regions, it is greatly enhanced in the optimal and overdoped regions. The optimal Tc is a result of the balance of these two opposite trends.
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ورودعنوان ژورنال:
- Physical review letters
دوره 92 22 شماره
صفحات -
تاریخ انتشار 2004