Many-Body Effects in Valleytronics: Direct Measurement of Valley Lifetimes in Single-Layer MoS2 Mai, Cong ; Barrette, Andrew ; Yu, Yifei ; Semenov, Yuriy G. ; Kim, Ki Wook ; Cao, Linyou ; Gundogdu, Kenan Abstract Publication: Nano Letters Pub Date: January 2014 DOI: 10.1021/nl403742j Bibcode: 2014NanoL..14..202M