Author Affiliations

Hanyu Zhu,¹ Jun Yi,¹ Ming-Yang Li,² Jun Xiao,¹ Lifa Zhang,³ Chih-Wen Yang,² Yuan Wang,^1,4 Robert A. Kaindl,⁴ Lain-Jong Li,² and Xiang Zhang^1,4,*

¹Nanoscale Science and Engineering Center (NSEC), University of California, Berkeley, CA 94720, USA.

²Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Kingdom of Saudi Arabia.

³Department of Physics, Nanjing Normal University, Nanjing, Jiangsu 210023, China.

⁴Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

^*Corresponding author: xzhang@me.berkeley.edu