Improved Coupled Reservoir Model for Inelastic Scattering in One-Dimensional Mesoscopic Metal Rings

• 来源期刊: 中国物理快报（英文版）
• 学科: 物理学
• 年，卷（期）: 2002,（4）
• 页码范围: 550-552
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

In order to strictly solve the problem of persistent current in one-dimensional mesoscopic metal rings, a model with a perfect ring coupled to an external reservoir by a four-lead junction is introduced to independently describe in sequential tunnelling. Since the S-matrix is unitary, the current conservation keeps automatically. Since the quadruplet of the matrix problem can be reduced into two topologically separate doublets, it gives a simple and elegant method compared vith the former description with a 3×3 matrix.