Browsing by Author "Shih, C. T."

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Variational phase diagram of the electron-doped two-dimensional extended t-J model
(2007-04-01)
Shih, C. T.
;
Wu, J. J.
;
Chou, C. P.
;
Chen, Y. C.
;
Lee, T. K.
In this paper, we will present the zero-temperature phase diagram of the two-dimensional extended t - J model studied by the variational Monte Carlo (VMC) method. The introduction of the next and third nearest neighbor hopping terms t ' and t '' breaks the symmetry of the phase diagram. For the electron doped systems (t ' positive), the phase boundary of antiferromagnetism (AFM) is pushed to larger doping density, and the superconducting (SC) region is suppressed, which are consistent with the experimental phase diagram.