一维变形t-J<sub>z</sub>模型的自旋–能隙相

许焱; 丁汉芹

doi:10.13568/j.cnki.651094.651316.2020.04.15.0006

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一维变形t-J_z模型的自旋–能隙相

数理科学 | 更新时间：2026-01-21

- 一维变形t-J_z模型的自旋–能隙相
- 一维变形t-J_z模型的自旋–能隙相
- 新疆大学学报（自然科学版中英文） 2020年37卷第4期页码：448-458
- 作者机构：
  
  1. 新疆大学物理科学与技术学院
  2. 新疆大学理论物理中心
- 作者简介：
- 基金信息：
  
  国家自然科学基金(11664037;11864039)~~
- DOI：10.13568/j.cnki.651094.651316.2020.04.15.0006
  中图分类号： O413
- 纸质出版：2020
- 稿件说明：
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[1]许焱,丁汉芹.一维变形t-J_z模型的自旋–能隙相[J].新疆大学学报(自然科学版)(中英文),2020,37(04):448-458.
[1]许焱,丁汉芹.一维变形t-J_z模型的自旋–能隙相[J].新疆大学学报(自然科学版)(中英文),2020,37(04):448-458. DOI： 10.13568/j.cnki.651094.651316.2020.04.15.0006.

DOI：10.13568/j.cnki.651094.651316.2020.04.15.0006.

摘要

通过玻色化和重整化群分析方法

我们研究了一维变形t-Jz模型的量子特性.在弱耦合区域和电子半满填充下

我们获得了模型的基态相图

体系表现为自旋-能隙相.电荷-能隙相变线λc=(πJz/16t)1/2把相图分成二个不同的量子相区:λc对应Neel序的绝缘相

λ≥λc对应超导序与Neel序共存的金属相.诱导产生的三体吸引作用是产生超导TS0序的物理原因.研究结果揭示一维变形t-Jz模型与t-Jz模型不等价.

Abstract

By the bosonization approach and renormalization-group analysis

we study quantum properties of a one-dimensional modified t-Jz model.At weak coupling and at half filling

we obtain ground state phase diagram

characterized completely by spin-gap phases.The charge-gap transition λc=(πJz/16t)1/2 divides the phase plane into two different regions:an insulator with Neel order for λ c

and a metal with coexisting superconductivity(TS0) and Neel(SDWz) orders for λ> λc.The induced three-body attractive interaction is responsible for the TS0 order.The results indicate that the 1D modified t-Jz version is not equivalent to the original t-Jz model.

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references

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一维变形t-Jz模型的自旋–能隙相

一维变形t-Jz模型的自旋–能隙相

DOI：10.13568/j.cnki.651094.651316.2020.04.15.0006

摘要

Abstract

关键词

Keywords

references

一维变形t-J_z模型的自旋–能隙相

一维变形t-J_z模型的自旋–能隙相