Highly Tunable Electronic Structures of Phosphorene/Carbon Nanotube Heterostructures through External Electric Field and Atomic Intercalation.

Tian, Xiao-Qing; Wang, Xiang-Rong; Wei, Ya-Dong; Liu, Lin; Gong, Zhi-Rui; Gu, Juan; Du, Yu; Yakobson, Boris I · Nano Lett · 2017

basic_science · Level V

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Abstract

Black phosphorene (BP)/carbon nanotube (CNT) heterostructures can be classified as either type I or II, depending on the size of the CNTs. An external electric field (E<sub>ext</sub>) can modulate the interfacial electronic structures and separate the electron and hole carriers of the BP/CNT heterostructures. The giant Stark effect is observed, and the band gap of the semiconducting heterostructures can vary several-fold. The intercalation of 3d transition metals can strongly bond BP and CNTs together. Furthermore, strong ferromagnetism with Curie temperature (T<sub>C</sub>) above room temperature is predicted. It is expected that these BP/CNT heterostructures will provide new opportunities and applications in the fields of optoelectronics and electronics as well as spintronics.