Eliminating edge electronic and phonon states of phosphorene nanoribbon by unique edge reconstruction

Abstract

Edge termination plays a vital role in determining the properties of 2D materials. By performing compelling ab initio simulations, a lowest-energy U-edge [ZZ(U)] reconstruction is revealed in the bilayer phosphorene. Such reconstruction reduces 60% edge energy compared with the pristine one and occurs almost without energy barrier, implying it should be the dominating edge in reality. The electronic band structure of phosphorene nanoribbon with such reconstruction resembles that of intrinsic 2D layer, exhibiting nearly edgeless band characteristics. Although ZZ(U) changes the topology of phosphorene nanoribbon (PNR), simulated TEM, STEM and STM images indicates it is very hard to be identified. One possible identify method is IR/Raman analyses because ZZ(U) edge alters vibrational modes dramatically. Beyond, it also increases the thermal conductivity of PNR 1.4 and 2.3 times than the pristine and Klein edges.

References in corpus (10)

• Energy Gaps in Graphene Nanoribbons
• The Renaissance of Black Phosphorus
• Self-passivating edge reconstructions of graphene
• Enhanced Thermoelectric Efficiency via Orthogonal Electrical and Thermal Conductances in Phosphorene
• Phosphorene nanoribbons, nanotubes and van der Waals multilayers
• BN white graphene with `colorful' edges--the energies and morphology
• Graphene edge from A to Z - and the origins of nanotube chirality
• The Critical Role of Substrate in Stabilizing Phosphorene Nanoflake: A Theoretical Exploration
• Phosphorene Edge Reconstruction by Self-Rolling
• Antiferromagnetism in hexagonal graphene structures: Rings vs dots