Open Access System for Information Sharing

Login Library

 

Article
Cited 708 time in webofscience Cited 725 time in scopus
Metadata Downloads

Observation of tunable band gap and anisotropic Dirac semimetal state in black phosphorus SCIE SCOPUS

Title
Observation of tunable band gap and anisotropic Dirac semimetal state in black phosphorus
Authors
Kim, JBaik, SSRyu, SHSohn, YPark, SPark, BGDenlinger, JYi, YChoi, HJKim, KS
Date Issued
2015-08-14
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Abstract
Black phosphorus consists of stacked layers of phosphorene, a two-dimensional semiconductor with promising device characteristics. We report the realization of a widely tunable band gap in few-layer black phosphorus doped with potassium using an in situ surface doping technique. Through band structure measurements and calculations, we demonstrate that a vertical electric field from dopants modulates the band gap, owing to the giant Stark effect, and tunes the material from a moderate-gap semiconductor to a band-inverted semimetal. At the critical field of this band inversion, the material becomes a Dirac semimetal with anisotropic dispersion, linear in armchair and quadratic in zigzag directions. The tunable band structure of black phosphorus may allow great flexibility in design and optimization of electronic and optoelectronic devices. © 2015, American Association for the Advancement of Science. All rights reserved.
URI
https://oasis.postech.ac.kr/handle/2014.oak/35510
DOI
10.1126/SCIENCE.AAA6486
ISSN
0036-8075
Article Type
Article
Citation
SCIENCE, vol. 349, no. 6249, page. 723 - 726, 2015-08-14
Files in This Item:
There are no files associated with this item.

qr_code

  • mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Related Researcher

Views & Downloads

Browse