Intricate modulation of interlayer coupling at the graphene oxide/ MoS e2 interface: Application in time-dependent optics and device transport

Tuhin Kumar Maji, Kumar Vaibhav, Samir Kumar Pal, Kausik Majumdar, K. V. Adarsh, Debjani Karmakar

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In the GO/MoSe2 semiconductor heterostructure, we have demonstrated a subtle control on the doping dynamics by modulating interlayer coupling through the combination of strain-reducing relative rotation of the constituting layers and variation of ligand type and concentration. By first-principles calculations incorporating spin-orbit coupling, we have investigated the impact of variable interlayer coupling in introducing noncollinear magnetic behavior in the heterostructure. The outcome of varying carrier type and their respective concentrations are investigated by static as well as time-dependent density functional calculations, which indicate the presence of optical anisotropy and time-dependent optical phenomena such as exciton quenching and band-gap renormalization. The performance of such heterostructures as channel material in devices with top and edge metal contacts is analyzed. Our self-consistent quantum transport calculations have evinced that the interface-induced variation in doping pattern is extrapolated only for devices with top contacts. The edge contact, although it exhibits a better transmission, is inefficient in sensing the ligand-induced doping modulation introduced via vertical interlayer charge transfer.

Original languageEnglish (US)
Article number115309
JournalPhysical Review B
Volume99
Issue number11
DOIs
StatePublished - Mar 12 2019

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Graphite
Oxides
Graphene
Heterojunctions
interlayers
Optics
graphene
Doping (additives)
Modulation
optics
modulation
oxides
Ligands
modulation doping
Optical anisotropy
ligands
Excitons
Density functional theory
Charge transfer
electric contacts

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Intricate modulation of interlayer coupling at the graphene oxide/ MoS e2 interface : Application in time-dependent optics and device transport. / Maji, Tuhin Kumar; Vaibhav, Kumar; Pal, Samir Kumar; Majumdar, Kausik; Adarsh, K. V.; Karmakar, Debjani.

In: Physical Review B, Vol. 99, No. 11, 115309, 12.03.2019.

Research output: Contribution to journalArticle

Maji, Tuhin Kumar ; Vaibhav, Kumar ; Pal, Samir Kumar ; Majumdar, Kausik ; Adarsh, K. V. ; Karmakar, Debjani. / Intricate modulation of interlayer coupling at the graphene oxide/ MoS e2 interface : Application in time-dependent optics and device transport. In: Physical Review B. 2019 ; Vol. 99, No. 11.
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