Stripe States with Spatially Oscillating d-Wave Superconductivity in the Two-Dimensional t−t′−J Model

A. Himeda; T. Kato; M. Ogata

doi:10.1103/PhysRevLett.88.117001

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Stripe States with Spatially Oscillating d-Wave Superconductivity in the Two-Dimensional t−t′−J Model

A. Himeda, T. Kato, M. Ogata

DOI 10.1103/PhysRevLett.88.117001 · Physical Review Letters

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Abstract

We study the interplay between stripes and d-wave superconductivity in the two-dimensional t−t′−J model using a variational Monte Carlo method. The next-nearest-neighbor hopping t′<0 stabilizes the stripe states around 1/8 hole doping rate. We find that stripes and spatially oscillating superconductivity coexist depending on parameters. The superconducting orders are enhanced at the hole stripe regions. Although the energy differences are relatively small, the stripe state in which the phases between adjacent superconducting stripes are the opposite (antiphase) is also stabilized. We consider the possibility that the antiphase coexistence may explain the weakness of the c-axis Josephson couplings in the La1.6−xNd0.4SrxCuO4.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La1.6-xNd0.4SrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown