Speaker

陶玲玲

哈尔滨工业大学物理学院

Date＆Time

2022.04.2（Sta）PM 14:00

Location

Tencent Meeting ID：183-969-378

Reporter

Lingling Tao is a professor at School of Physics, Harbin Institute of Technology. He earned his Ph.D. at Institute of Physics, Chinese Academy of Sciences in 2014 and his B.S. at Lanzhou University in 2009. He then joined the University of Hong Kong and University of Nebraska-Lincoln as a postdoctoral fellow. He is a theorist in condensed matter physics, with current primary interests in spin-orbitronics and quantum transport.

Abstract

During the last decade, the spintronics based on spin-orbit coupling (SOC), the so-called spin-orbitronics, where the generation, manipulation and detection of spins are realized by all electrical means, has aroused great interest. The SOC in a solid without inversion symmetry is characterized by the spin splitting of electronic bands and specific spin texture-spin arrangement in momentum space. In this talk, I will first discuss the nature of spin texture governed by the point group symmetry. In particular, I will focus on the persistent spin texture, which preserves the SU(2) spin rotation symmetry and renders an ultimately infinite spin lifetime, and spin-textured ferroelectrics, where SOC leads to an intrinsic link between spin texture and electric polarization, with the appealing perspective of electric-field control of spin. Second, I will discuss two novel spin-orbitronic devices i.e. valley-spin valve and valley-spin logic gate, which utilizes the electric control of spin.