D-Wave Kondo Problem in a Square Tight-Bounding Lattice

• 来源期刊: 中国物理快报（英文版）
• 学科: 物理学
• 年，卷（期）: 2002,（1）
• 页码范围: 111-113
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

A Kondo model in a square tight-bonding lattice of conduction electrons is considered. The Kondo interaction takes a d-wave. Using mean-field theory and numerical simulations, it is found that there is a pseudo-gap for the impurity density of states at the Fermi level. Numerical results also show that the exponents of the lowtemperature thermodynamic quantities are non-universal but dependent on the interaction.