(This study was published in ACS NANO on Nov.11,2015: Naoki Fukata, Mingke Yu, Wipakorn Jevasuwan, Toshiaki Takei, Yoshio Bando, Wenzhuo Wu, and Zhong Lin Wang: Clear experimental demonstration of hole gas accumulation in Ge/Si core-shell nanowires[DOI:
10.1021/acsnano.5b05394])