Breakdown of Landau Fermi liquid theory： Restrictions on the degrees of freedom of quantum electrons

作     者：Yue-Hua Su Han-Tao Lu 

作者机构：Department of Physics Yantai University Yantai 264005 China Center for Interdisciplinary Studies Lanzhou University Lanzhou 730000 China 

出 版 物：《Frontiers of physics》 (物理学前沿（英文版）)

年 卷 期：2018年第13卷第2期

页      面：119-137页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 08[工学] 0702[理学-物理学] 

基　　金：We thank Tao Li and Yin Zhong for help- ful discussions. H. T. Lu acknowledges the support of the National Natural Science Foundation of China (Grant No. 11474136). Y. H. Su was partially supported by the Natural Science Foundation of China (Grant No. 11774299) and the Natural Science Foundation of Shandong Province (Grant No. ZR2017MA033) 

主　　题：breakdown of the Landau Fermi liquids degrees of freedom symmetry topology 

摘      要：One challenge in contemporary condensed matter physics is to understand unconventional electronic physics beyond the paradigm of Landau Fermi-liquid theory. Here, we present a perspective that posits that most such examples of unconventional electronic physics stem from restrictions on the degrees of freedom of quantum electrons in Landau Fermi liquids. Since the degrees of freedom are deeply connected to the system＇s symmetries and topology, these restrictions can thus be realized by external constraints or by interaction-driven processes via the following mechanisms： （i） symmetry breaking, （ii） new emergent symmetries, and （iii） nontrivial topology. Various examples of unconventionM elec- tronic physics beyond the reach of traditional Landau Fermi liquid theory are extensively investigated from this point of view. Our perspective yields basic pathways to study the breakdown of Landau Fermi liquids and also provides a guiding principle in the search for novel electronic systems and devices.