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Absence of Coexistence of Superconductivity and Antiferromagnetism of the Hole-Doped Two-Dimensional Extended $t-J$ Model | C. T. Shih
; Y. C. Chen
; C. P. Chou
; T. K. Lee
; | Date: |
19 Aug 2004 | Journal: | Phys. Rev. B 70, 220502(R), 2004 | Subject: | Strongly Correlated Electrons; Superconductivity | cond-mat.str-el cond-mat.supr-con | Abstract: | The possibility of coexistence of superconductivity (SC) and antiferromagnetic long range order (AFLRO) of the two-dimensional extended $t-J$ model in the very underdoped region is studied by the variational Monte-Carlo (VMC) method. In addition to using previously studied wave functions, a recently proposed new wave function generated from the half-filled Mott insulator is used. For hole-doped systems, the phase boundary between AFLRO and $d-$wave SC for the physical parameters, $J/t=0.3$, $t’/t=-0.3$ and $t’’/t=0.2$, is located near hole density $delta_c = 0.06$, and there is {it no} coexistence. The phase transition is first-order between these two homogeneous phases at $delta_c$. | Source: | arXiv, cond-mat/0408422 | Services: | Forum | Review | PDF | Favorites |
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