From Insulator to Superconductor in a Modified t-J Chain with Regulated Electron Hopping

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• 作者：Hanqin Ding ; Jun Zhang
• 关键词：One dimension ; Modified t ; J model ; Bosonization ; Weak coupling ; Phase diagram
• 刊名：Journal of Low Temperature Physics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：186
• 期：1-2
• 页码：10-20
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials;
• 出版者：Springer US
• ISSN：1573-7357
• 卷排序：186

文摘

The one-dimensional modified t-J model is investigated analytically by regulating the kinetic hopping at half filling. The transition from insulator to triplet superconductivity is predicted in the context of antiferromagnetic exchange. The ground-state phase diagram is obtained by use of bosonization and renormalization group schemes in the weak coupling regime. Our study provides a possible theoretical scenario for the realization of superconductivity. The result indicates that the physics of the modified model is not equivalent to that of the t-J model.