Chan-Shan Yang

Abstract After the discovery of sp2-hybridized graphene and even lighter borophene, the scientific quest for the thinnest metallic sheets prompts the discovery of beryllene. As beryllium lacks p-electrons, the hybridization and structural evolution of beryllene in determining electronic/excitonic behaviors are scientifically interesting. Herein, we report the experimental realization of freestanding flat beryllene sheets with a lateral dimension of ~0.2–4 μm via sonochemical exfoliation.

Evolution of optical nonlinearity within graphene/Bi2Te3 heterostructure Jia-chi Lan, Chan-Shan Yang, Chun-Hu Chen, Chang-Maw Cheng, Hong Liu and Chao-Kuei Lee Abstract A z-scan technique was used to analyse the optical nonlinearity of a graphene/Bi2Te3 heterostructure under pulsed laser excitation at 800 nm. The intensity-dependent transmittance over 10 orders of magnitude indicated that the heterostructure displayed a versatile nonlinear absorption behaviour.

Report Quantum-critical conductivity of the Dirac fluid in graphene Patrick Gallagher1,2, Chan-Shan Yang1,3, Tairu Lyu1, Fanglin Tian1,4, Rai Kou1, Hai Zhang1,5, Kenji Watanabe6, Takashi Taniguchi6, Feng Wang1,2,7,* 1Department of Physics, University of California, Berkeley, CA 94720, USA. 2Kavli Energy NanoScience Institute, University of California, and Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.