Singlet pairing and superconductivity in t-J ladders with Mott insulating stripes

Article

关键词: HIGH-TEMPERATURE SUPERCONDUCTIVITY;    QUANTUM RENORMALIZATION-GROUPS;    FERMI-HUBBARD MODEL;    DENSITY;    PHYSICS;    OXIDES;    CHARGE;    SPINS;   

DOI  :  10.1103/PhysRevB.98.121112

来源: SCIE

【 摘 要 】

Pairing in superconductors occurs in a variety of channels and can be produced by various mechanisms. Here, we show that, in the presence of strong correlations, a singlet-pair superconducting phase can occur in ladder geometries with the fermions in the pairs residing on different sides of a Mott insulating stripe. The antiferromagnet correlations in the Mott stripe provide the pairing glue in such a phase. We study, using the density matrix renormalization group method, the ground state of four-leg t-J ladders with Mott insulating stripes in the inner two legs. Pairing and superconductivity are revealed by the presence of negative binding energies and by algebraically decaying interleg singlet-pair correlations, respectively.

【 授权许可】

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