Ruppert, Claudia, Alexey Chernikov, Heather M. Hill, Albert F. Rigosi, and Tony F. Heinz. “The Role of Electronic and Phononic Excitation in the Optical Response of Monolayer W after Ultrafast Excitation.”https://doi.org/10.1021/acs.nanolett.6b03513__Nano Letters 17, no. 2 (2017): 644–51.https://doi.org/10.1021/acs.nanolett.6b03513 .