Itinerant ferromagnetism in repulsively interacting spin-orbit coupled Fermi systems --物理学院“博约学术论坛”系列报告
来源: 作者: 发布时间:2015-01-05邀请人:
报告人:
时间: 2015-01-05
地点:
                                
                                    主讲人简介:
                                
                                
                                
                            
第58期     (2015年第1期) 
 Title: Itinerant ferromagnetism in repulsively interacting spin-orbit coupled Fermi systems 
 报告人:叶锦武 教授 (首都师范大学)
 时   间:2015年1月5日(周一)上午10:00;
 地   点:3号教学楼423
ABSTRACT 
 We investigate the itinerant ferromagnetism of repulsively interacting Fermi gases with spin-orbit coupling (SOC). We find that the spin-orbit coupling provides a new and efficient mechanism to realize the itinerant ferromagnetism (FM) which is a long sought state in material science at much weaker repulsive interactions. We present a classification of the symmetries and symmetry breaking of the SOC Hamiltoniian and their exact constraints on the density-spin correlation functions. 
 In the FM side, the Fermi surfaces acquire a finite momentum and also experience a topological Lifshitz transition, the symmetry breaking leads to one gapped transverse pseudo-Goldstone mode instead of one gapless Goldstone mode. Various experimental probes are discussed.
 报告人简历:
叶锦武教授是美国耶鲁大学物理博士,现在是首都师范大学长江学者教授和美国密西西比州立大学教授. 叶锦武主要研究领域是强相互作用的电子,自旋,光子等基本粒子的合作现象和量子相变理论,也喜欢研究中国人民解放军的历史, 特别是开国战神粟裕战略和战术对自然科学的指导作用。
 联系方式:物理学院办公室 (68913163)
 邀 请 人:杨帆 教授
 网    址:http://physics.bit.edu.cn/
                    
            
            