首页> 外文会议>Acta physica polonica A >Magnetic Properties of Metallic Impurities with Strongly Correlated Electrons
【24h】

Magnetic Properties of Metallic Impurities with Strongly Correlated Electrons

机译:具有强相关电子的金属杂质的磁性

获取原文
获取原文并翻译 | 示例

摘要

We study the single impurity Anderson model in an external magnetic field. There are no exact results for the spectral function in this situation. Using a resummation of the diagrammatic expansion we demonstrate that the strong coupling regime in a weak magnetic field is Kondo-like with a quasiparticle resonant peak split into two. We find two exponentially small Kondo scales (temperatures), one for transverse and one for longitudinal spin fluctuations. We show that the salient features of the spectral function in the Kondo regime can be seen already within an extended random phase approximation. To reveal the dependence of the Kondo scales on the bare electron interaction, however, one has to employ a two-particle self-consistency with renormalized vertices. We use the parquet approach to derive the dependence of the Kondo scales on magnetic field.
机译:我们研究了外部磁场中的单杂质安德森模型。在这种情况下,光谱函数没有确切的结果。使用图解展开式的恢复,我们证明了弱磁场中的强耦合机制是近藤状的,准粒子共振峰分裂为两个。我们发现两个指数级的近藤标度(温度),一个用于横向,另一个用于纵向自旋波动。我们显示,在扩展的随机相位近似内已经可以看到近藤谱中频谱函数的显着特征。为了揭示近藤标度对裸电子相互作用的依赖性,必须使用具有重新归一化的顶点的两粒子自洽性。我们使用镶木地板方法得出近藤标度对磁场的依赖性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号