Germanene/GaGeTe heterostructure: a promising electric-field induced data storage device with high carrier mobility
文献情報
Liang Zhang, Jin Zhang, Pei-ji Wang, Chang-Wen Zhang
Opening up a band gap without lowering high carrier mobility in germanene and finding suitable substrate materials to form van der Waals heterostructures have recently emerged as an intriguing way of designing a new type of electronic devices. By using first-principles calculations, here, we systematically investigate the effect of the GaGeTe substrate on the electronic properties of monolayer germanene. Linear dichroism of the Dirac-cone like band dispersion and higher carrier mobility (9.7 × 103 cm2 V−1 s−1) in the Ge/GaGeTe heterostructure (HTS) are found to be preserved compared to that of free-standing germanene. Remarkably, the band structure of HTS can be flexibly modulated by applying bias voltage or strain. A prototype data storage device FET based on Ge/GaGeTe HTS is proposed, which presents a promising high performance platform with a tunable band gap and high carrier mobility.
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