Work Function Tuning in Two-Dimensional MoS2 Field-Effect-Transistorswith Graphene and Titanium Source-Drain Contacts

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/487048.do
DOI
10.1038/srep45546
Title
Work Function Tuning in Two-Dimensional MoS2 Field-Effect-Transistorswith Graphene and Titanium Source-Drain Contacts
Description
SSB acknowledges supports from KISTI supercomputing center (Project No.KSC-2016-C2-0015). S.I. acknowledges financial supports from NRL(NRF-2014R1A2A1A01004815) and BK21 plus program. H.J.C. acknowledgessupports from NRF of Korea (Grant No. 2011-0018306) and KISTIsupercomputing center (Project No. KSC-2013-C3-062).
abstract
Based on the first principles calculation, we investigate the electronic band structures of graphene-MoS2 and Ti-MoS2 heterojunctions under gate-voltages. By simultaneous control of external electric fields and carrier charging concentrations, we show that the graphene's Dirac point position inside the MoS2 bandgap is easily modulated with respect to the co-varying Fermi level, while keeping the graphene's linear band structure around the Dirac point. The easy modulation of graphene bands is not confined to the special cases where the conduction-band-minimum point of MoS2 and the Dirac point of graphene are matched up in reciprocal space, but is generalized to their dislocated cases. This flexibility caused by the strong decoupling between graphene and MoS2 bands enhances the gate-controlled switching performance in MoS2-graphene hybrid stacking-device.
provenance
Made available in Cube on 2018-09-28T16:23:52Z (GMT). No. of bitstreams: 0
language
English
author
Baik, Seung Su
Im, Seongil
Choi, Hyoung Joon
orcid
Choi, Hyoung Joon/0000-0001-8565-8597
accessioned
2018-09-28T16:23:52Z
available
2018-09-28T16:23:52Z
issued
2017
citation
SCIENTIFIC REPORTS(7)
issn
2045-2322
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/487048.do
Funder
과학기술정보통신부
Funding Program
한국고등과학원연구운영비지원
Project ID
1711061581
Jurisdiction
Rep.of Korea
Project Name
Electronic structures of two-dimensional nanomaterials
rights
openAccess
type
article


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