低维体系的相变和叠套  

PHASE TRANSITION AND NESTING IN LOW DIMENSION

作　　者：凌帆[1] 陈小兵[1] 傅荣堂[2,3] 孙鑫[2,3] 川添良幸 

机构地区：[1]扬州大学师范学院物理系 [2]复旦大学物理系 [3]中国科学院红外物理国家重点实验室 [4]日本东北大学材料研究所

出　　处：《物理学报》1997年第10期1972-1977,共6页Acta Physica Sinica

基　　金：国家自然科学基金;国家高技术研究发展计划

摘　　要：与一维体系不同，二维体系费密面的叠套是不完全的，此种叠套的偏离会显著地减弱体系的不稳定性．定量地研究了叠套偏离对Ｐｅｉｅｒｌｓ相变的影响，并确定了叠套偏离的限度，超过此值，Ｐｅｉｅｒｌｓ相变被抑制，这有利于进入超导态．The nesting of the Fermi surface in a two dimensional (2D) system is not perfect, which is distinctly different from one dimensional system. The nesting deviation can heavily suppress the instability of 2D system. In this paper, the effect of the nesting deviation on the Peierls transition is quantitatively studied, and the limit for the nesting deviation, beyond which the Peierls transition is destroyed, is determined. Such a behavior is favorable to get the superconductivity.

关 键 词：低温物理 低维体系 相变 叠套 费密面 

分 类 号：O513[理学—低温物理]