Absorption dichroism of monolayer 1T'-MoTe2in visible range

Gang Hee Han, Dong Hoon Keum, Jiong Zhao, Bong Gyu Shin, Seunghyun Song, Jung Jun Bae, Jubok Lee, Jung Hokim, Hyun Kim, Byoung Hee Moon, Young Hee Lee

Research output: Journal article publicationJournal articleAcademic researchpeer-review

21 Citations (Scopus)

Abstract

Among various transition metal dichalcogenides, MoTe2has drawn attention due to its capability of robust phase engineering between semiconducting (2H) and semi-metallic distorted octahedral (1T') phase. In particular, 1T'-MoTe2has been predicted to have intriguing physics such as quantum spin Hall insulator, large magnetoresistance, and superconductivity. Recent progress showed weak antilocalization behavior in 1T'-MoTe2which is the one of representative characteristics in topological insulator. Here, we grow centimeter-scale monolayer 1T'-MoTe2on SiO2/Si substrate via chemical vapordeposition and demonstrate dichroism in visible range. Ribbon-like 1T'-MoTe2flakes were initially nucleated randomly on SiO2substrate and at a later stage merged to form a continuous monolayer film over the entire substrate. Each flake revealed one dimensional Mo-Modimerization feature and anisotropic absorption behavior in visible range (400-600 nm). This allowed us to detect the grain boundary due to stark contrast difference among flakes in different orientations.
Original languageEnglish
Article number031010
Journal2D Materials
Volume3
Issue number3
DOIs
Publication statusPublished - 8 Sep 2016
Externally publishedYes

Keywords

  • Absorption dichroism
  • Chemical vapor deposition
  • MoTe 2
  • Transition metal dichalcogenides

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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