Direct observation of Klein tunneling in phononic crystals | ScienceView ORCID ProfileXue Jiang1,2,*, View ORCID ProfileChengzhi Shi1,3,*, View ORCID ProfileZhenglu Li4,5, Siqi Wang1, View ORCID ProfileYuan Wang1, View ORCID ProfileSui Yang1, View ORCID ProfileSteven G. Louie4,5, View ORCID ProfileXiang Zhang1,6,†1Nano-scale Science and Engineering Center, University of California, Berkeley, CA 94720, USA.2Department of Electronic Engineering, Fudan University, Sh
