nl4019287_si_001.pdf (3.39 MB)
Two-Dimensional Transition Metal Honeycomb Realized: Hf on Ir(111)
journal contribution
posted on 2016-02-18, 17:02 authored by Linfei Li, Yeliang Wang, Shengyi Xie, Xian-Bin Li, Yu-Qi Wang, Rongting Wu, Hongbo Sun, Shengbai Zhang, Hong-Jun GaoTwo-dimensional (2D) honeycomb systems
made of elements with d
electrons are rare. Here, we report the fabrication of a transition
metal (TM) 2D layer, namely, hafnium crystalline layers on Ir(111).
Experimental characterization reveals that the Hf layer has its own
honeycomb lattice, morphologically identical to graphene. First-principles
calculations provide evidence for directional bonding between adjacent
Hf atoms, analogous to carbon atoms in graphene. Calculations further
suggest that the freestanding Hf honeycomb could be ferromagnetic
with magnetic moment μ/Hf = 1.46 μB. The realization
and investigation of TM honeycomb layers extend the scope of 2D structures
and could bring about novel properties for technological applications.