Atomic arrangement of van der Waals heterostructures using X-ray scattering and crystal truncation rod analysis

Ryung Kim, Byoung Ki Choi, Kyeong Jun Lee, Hyuk Jin Kim, Hyun Hwi Lee, Tae Gyu Rhee, Yeong Gwang Khim, Young Jun Chang, Seo Hyoung Chang

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Vanadium diselenide (VSe2) has intriguing physical properties such as unexpected ferromagnetism at the two-dimensional limit. However, the experimental results for room temperature ferromagnetism are still controversial and depend on the detailed crystal structure and stoichiometry. Here we introduce crystal truncation rod (CTR) analysis to investigate the atomic arrangement of bilayer VSe2 and bilayer graphene (BLG) heterostructures grown on a 6H–SiC(0001) substrate. Using non-destructive CTR analysis, we were able to obtain electron density profiles and detailed crystal structure of the VSe2/BLG heterostructures. Specifically, the out-of-plane lattice parameters of each VSe2 layer were modulated by the interface compared to that of the bulk VSe2 1T phase. The atomic arrangement of the VSe2/BLG heterostructure provides deeper understanding and insight for elucidating the magnetic properties of the van der Waals heterostructure.

Original languageEnglish
Pages (from-to)70-75
Number of pages6
JournalCurrent Applied Physics
Volume46
DOIs
StatePublished - Feb 2023

Keywords

  • Crystal truncation rod
  • Transition-metal dichalcogenide
  • Vanadium diselenide
  • X ray scattering
  • van der Waals

Fingerprint

Dive into the research topics of 'Atomic arrangement of van der Waals heterostructures using X-ray scattering and crystal truncation rod analysis'. Together they form a unique fingerprint.

Cite this