题 目：Itinerant ferromagnetism in repulsively interacting spin-orbitcoupled Fermi gas

报告人：叶锦武 教授（首都师范大学、美国密西西比州立大学）

时 间：1月8日（周四）上午10：00

地 点：物理楼313学术报告厅

附：报告摘要

We investigate theitinerant ferromagnetism of repulsively interacting Fermi gases with spin-orbitcoupling (SOC). We find that the spin-orbit coupling provides a new andefficient mechanism to realize the itinerant ferromagnetism (FM) which is along sought state in material science at much weaker repulsive interactions. Wepresent a classification of the symmetries and symmetry breaking of the SOCHamiltoniian and their exact constraints on the density-spin correlationfunctions. In the FM side, the Fermi surfaces acquire a finite momentum andalso experience a topological Lifshitz transition, the symmetry breaking leadsto one gapped transverse pseudo-Goldstone mode instead of one gapless Goldstonemode. Various experimental probes are discussed.

叶锦武教授简介：

美国耶鲁大学物理博士，现任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，主要研究强相互作用的电子，自旋，光子等基本粒子的合作现象和量子相变理论。

爱好：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。