| D—Wave Kondo Problem in a Square Tight—Bounding Lattice |
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| 作者姓名： | 杨凯华 宋波 等 |
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| 作者单位： | [1]InstituteofMicroelectronics,PekingUniversity,Beijing100871 [2]InstituteofPhysicsandCenterforCondensedMatterPhysics,ChineseAcademyofSciences,Beijing100090 |
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| 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.
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| 关 键 词： | 凝聚态物理 kondo问题 数字重整化群法 |
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