TY - JOUR
T1 - STM visualization of carbon impurities in sandwich structures consisting of hexagonal boron nitride and graphene
AU - Haga, Taishi
AU - Fujimoto, Yoshitaka
AU - Saito, Susumu
N1 - Funding Information:
This work was partly supported by MEXT Elements Strategy Initiative to Form Core Research Center through Tokodai Institute for Element Strategy and JSPS KAKENHI Grant Numbers JP17K05053 and JP25107005. Computations were partly done at Institute for Solid State Physics, the University of Tokyo, at Cybermedia Center of Osaka University, and at Global Scientific Information and Computing Center of the Tokyo Institute of Technology. T. H. also acknowledges the financial support from Advanced Research Center for Quantum Physics and Nanoscience, Tokyo Institute of Technology.
Publisher Copyright:
© 2019 The Japan Society of Applied Physics.
PY - 2019
Y1 - 2019
N2 - We study the electronic structures and scanning tunneling microscopy (STM) images of heterostructures consisting of pristine h-BN, graphene, and C-doped h-BN layers using first-principles total-energy calculations within the framework of the density functional theory. We find that substitutional doping of a C atom at B and N sites in the h-BN layer induces the different charge carrier types and asymmetric carrier densities on the graphene layer. We also find that C-atom impurity state can be clearly observed in the STM image when a C atom is doped at the N site in the h-BN layer. We discuss the relationship between the STM images and the spatial distribution of the C-induced impurity state.
AB - We study the electronic structures and scanning tunneling microscopy (STM) images of heterostructures consisting of pristine h-BN, graphene, and C-doped h-BN layers using first-principles total-energy calculations within the framework of the density functional theory. We find that substitutional doping of a C atom at B and N sites in the h-BN layer induces the different charge carrier types and asymmetric carrier densities on the graphene layer. We also find that C-atom impurity state can be clearly observed in the STM image when a C atom is doped at the N site in the h-BN layer. We discuss the relationship between the STM images and the spatial distribution of the C-induced impurity state.
UR - http://www.scopus.com/inward/record.url?scp=85072820444&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85072820444&partnerID=8YFLogxK
U2 - 10.7567/1347-4065/ab0ff8
DO - 10.7567/1347-4065/ab0ff8
M3 - Article
AN - SCOPUS:85072820444
SN - 0021-4922
VL - 58
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
IS - SI
M1 - SIIB03
ER -