非对称性Anderson晶格模型中的磁性相变研究
Magnetic Transition in Non-Symmetric Anderson Lattice Model
DOI: 10.12677/CMP.2019.81004, PDF,    国家自然科学基金支持
作者: 黎欢：桂林理工大学，广西 桂林
关键词: 重费米子；磁性相变；相图；Heavy-Fermion； Magnetic Transition； Phase Diagram
摘要: Anderson晶格模型是描述重费米子系统的重要理论模型，而隶玻色子方法是求解该模型的常用方法。然而，通常的Kotliar-Ruckenstein隶玻色子方法只能处理该模型的粒子–空穴对称情形。本文将Kotliar-Ruckenstein方法加以推广，使之能够处理偏离粒子–空穴对称的非对称情形，并用之研究了非对称性Anderson晶格模型中的磁性相变，展示了晶格维度、电子跳迁系数、库仑关联强度、电子杂化强度、局域电子能级等多种参数对磁性相变边界的影响。
Abstract: Anderson lattice model, which can be solved by the widely used slave-boson method, is a standard model to describe the heavy-fermion systems. However, the normal Kotliar-Ruckenstein slave-boson method is limited to the case with particle-hole symmetry, particular in investigating the magnetic phase in Anderson lattice model. In this paper, the Kotliar-Ruckenstein method is generalized to include the non-symmetric case which violates the particle-hole symmetry. Then, the magnetic phase boundary in Anderson lattice model is studied as a function of lattice dimension, electron-hopping amplitudes, Coulomb correlation, electron hybridization and local energy level.
文章引用：黎欢. 非对称性Anderson晶格模型中的磁性相变研究[J]. 凝聚态物理学进展, 2019, 8(1): 23-31. https://doi.org/10.12677/CMP.2019.81004

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