Condensed Matter Seminar Series: Wei Han

October 25, 2016
Thursday, March 9, 2017 - 11:30am to 12:30pm
1080 Smith Seminar Series Room, PRB
Han

Please join us for a CME Seminar presented by Professor Wei Han from ICQM, Peking University, China as he shares his research on "Spin and Charge Conversion in 2D Quantum Materials". 

Abstract

Spintronics aims to use the spin degrees of freedom for future information technologies. A key challenge for spintronics is the efficient generation of spin currents from charge currents. Recently, emergent 2D quantum materials are very attractive for spintronics since they provide new mechanisms of spin currents generation [1]. 
In this talk, I will present the spin and charge conversion in three quantum materials. The first part of my talk will discuss the facet-dependent spin Hall effect and spin orbit torque in single crystalline antiferromagnetic IrMn3 [2], This result suggests a novel mechanism of the spin current generation arising from the triangular spin configurations in the single crystalline IrMn3. The second part of my talk will discuss the spin to charge conversion in the spin-momentum locked surface states of the topological Kondo insulator (SmB6), of which pure surface states exist at low temperatures [3]. At the end, I will present on the gate tunable charge to spin conversion at room temperature using the Rashba-split 2DEG at the complex oxides (SrTiO3 and LaAlO3) interface [4]. 
 
References:
[1] Wei Han, APL Materials 4, 032401 (2016).
[2] Weifeng Zhang*, Wei Han*, See-hun Yang, Yan Sun, Yang Zhang, Binghai Yan, and Stuart S. P. Parkin, Science Advances, 2: e1600759 (2016). 
[3] Qi Song, Jian Mi, Dan Zhao, Tang Su, Wei Yuan, Wenyu Xing, Yangyang Chen, Tianyu Wang, Tao Wu, Xian Hui Chen, X. C. Xie, Chi Zhang, Jing Shi, and Wei Han, Nature Communications (In press) (2016).
[4] Qi Song, Hongrui Zhang, Tang Su, Wei Yuan, Yangyang Chen, Wenyu Xing, Jing Shi, Ji Rong Sun, and Wei Han, arXiv:1609.06207.
 
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