中国物理B ›› 2011, Vol. 20 ›› Issue (1): 17104-017104.doi: 10.1088/1674-1056/20/1/017104
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
胡冬生, 朱陈平, 张永梅
Hu Dong-Sheng(胡冬生)†,Zhu Chen-Ping(朱陈平),and Zhang Yong-Mei(张永梅)
摘要: We investigate the transport properties of a ladder with two random dimer (RD) chains. It is found that there are two extended states in the ladder with identical RD chains and a critical state regarded as an extended state in the ladder with pairing RD chains. Such a critical state is caused by the chiral symmetry. The ladder with identical RD chains can be decoupled into two isolated RD chains and the ladder with pairing RD chains can not. The analytic expressions of the extended states are presented for the ladder with identical RD chains.
中图分类号: (Theories and models; localized states)