Supported by the National Natural Science Foundation of China (Grant Nos. 12074172, 11674160, and 11974168);the Startup Grant at Nanjing University;the State Key Program for Basic Researches of China (Grant No. 2017YFA0303203);the Excellent Programme at Nanjing University。
Helical edge states are the hallmark of the quantum spin Hall insulator. Recently, several experiments have observed transport signatures contributed by trivial edge states, making it difficult to distinguish between ...