High mobility holes at germanane/Ge(111) allotropic cross-dimensional heterointerface

Yumiko Katayama, Daiki Kobayashi, Hikaru Okuma +3

Germanane (GeH) is essentially a hydrogen-terminated Ge analog of graphene with a direct gap (~1.6 eV). Record hole mobility mu_h~67,000 cm2/Vs is found at 15 K for a single allotr…