We examine the two-dimensional t−J model by using variational approach combined with well established quantum Monte Carlo techniques [S. Sorella et al., Phys. Rev. Lett. 88, 117002 (2002)] that are used to improve systematically the accuracy of the variational ansatz. Contrary to recent density-matrix renormalization group and projected entangled-pair state calculations [P. Corboz et al., Phys. Rev. B 84, 041108(R) (2011)], a uniform phase is found for J /t = 0.4, even when the calculation is biased with an ansatz that explicitly contains stripe order. Moreover, in the small hole doping regime, that is, δ 0.1, our results support the coexistence of antiferromagnetism and superconductivity.

Absence of static stripes in the two-dimensional t-J model by an accurate and systematic quantum Monte Carlo approach / Hu, W. J.; Becca, Federico; Sorella, Sandro. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 85:8(2012), pp. 1-4. [10.1103/PhysRevB.85.081110]

Absence of static stripes in the two-dimensional t-J model by an accurate and systematic quantum Monte Carlo approach

Becca, Federico;Sorella, Sandro
2012-01-01

Abstract

We examine the two-dimensional t−J model by using variational approach combined with well established quantum Monte Carlo techniques [S. Sorella et al., Phys. Rev. Lett. 88, 117002 (2002)] that are used to improve systematically the accuracy of the variational ansatz. Contrary to recent density-matrix renormalization group and projected entangled-pair state calculations [P. Corboz et al., Phys. Rev. B 84, 041108(R) (2011)], a uniform phase is found for J /t = 0.4, even when the calculation is biased with an ansatz that explicitly contains stripe order. Moreover, in the small hole doping regime, that is, δ 0.1, our results support the coexistence of antiferromagnetism and superconductivity.
2012
85
8
1
4
081110
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.85.081110
https://arxiv.org/abs/1111.5158
Hu, W. J.; Becca, Federico; Sorella, Sandro
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/12970
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