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物理学与信息技术学院 恒元物理学讲座(第043期):Electron-phonon interaction and magneto-optical effect in topological valleytronic materials

发布时间:2015-06-30 浏览:

讲座题目:物理学与信息技术学院 恒元物理学讲座(第043期):Electron-phonon interaction and magneto-optical effect in topological valleytronic materials

讲座人:李舟 客座研究员(日本理化学研究所)

讲座时间:16:30

讲座日期:2015-6-29

地点:长安校区 物理学与信息技术学院三层会议厅(致知楼3328)

主办单位:物理学与信息技术学院

讲座内容:In Graphene and topological insulators (recently also in Weyl semimetals), the Hamiltonian is governed by Dirac equation. In spintronics the Hamiltonian is similar but with the strength of Fermi velocity to be much smaller, making the system cross over from Dirac fermions to Schrodinger fermions. Strong distortion of the Fermi surface could introduce a hexagonal warping term in the Hamiltonian in which the energy is proportional to the cubic of the momentum. Optical and magneto-optical measurements play an important rule in determining the physics of superconductors and now we use these tools to probe topological materials. Finally the impact of electron-phonon interaction on these systems will be addressed.