✦ LIBER ✦
Ring exchange mechanism for triplet superconductivity in a two-chain Hubbard model
✍ Scribed by Y. Ohta; S. Nishimoto; T. Shirakawa; Y. Yamaguchi
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 95 KB
- Volume
- 378-380
- Category
- Article
- ISSN
- 0921-4526
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✦ Synopsis
The density-matrix renormalization group (DMRG) method is used to calculate the binding energy of electrons and pair correlation functions in the two-chain zigzag-bond Hubbard model at quarter filling. We show that the ground state of the model can be superconducting in the spin-triplet channel when we make an appropriate choice of the signs of hopping integrals for the ferromagnetic ring-exchange mechanism to work. Possible relevance of our mechanism to the triplet superconductivity observed in ðTMTSFÞ 2 X is discussed.