Absence of the coexistence of superconductivity and antiferromagnetism in the hole-doped two-dimensional extended t−J model

C. T. Shih; Y. C. Chen; C. P. Chou; T. K. Lee

doi:10.1103/PhysRevB.70.220502

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Absence of the coexistence of superconductivity and antiferromagnetism in the hole-doped two-dimensional extended t−J model

C. T. Shih, Y. C. Chen, C. P. Chou, T. K. Lee

DOI 10.1103/PhysRevB.70.220502 · Physical Review B

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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 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 δc≅0.06, and there is no coexistence. The phase transition is first order between these two homogeneous phases at δc.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	55	Pressure not reported	unknown
YBa2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	62.7	Pressure not reported	unknown