Spin-gapped phases in the frustrated Hubbard chain with transverse spin anisotropy |
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Authors: | Hanqin Ding Na Zhao Xueling Shi Jun Zhang Yongdong He |
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Institution: | School of Physical Science and Technology, Xinjiang University, Urumqi 830046, China |
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Abstract: | At weak coupling, we investigate the frustrated Hubbard chain including nearest-neighbor and next-nearest-neighbor antiferromagnetic exchange with easy-plane anisotropy and . At half filling, we obtain three different phases in the – plane: a transverse spin density wave phase, a bond order wave phase and a Luther–Emery metallic phase characterized by the coexistence of singlet superconductivity and charge density wave correlations. The frustrating exchange accounts for the spin-gapped phases. |
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Keywords: | Hubbard chain Frustration Spin-gapped phase Weak coupling Transverse spin anisotropy |
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