Scientific article

Dimensional crossover of the charge density wave transition in thin exfoliated VSe2

Published in2D Materials, vol. 4, no. 4, 041005
Publication date2017

Isolating single unit-cell thin layers from the bulk matrix of layered compounds offers tremendous opportunities to design novel functional electronic materials. However, a comprehensive thickness dependence study is paramount to harness the electronic properties of such atomic foils and their stacking into synthetic heterostructures. Here we show that a dimensional crossover and quantum confinement with reducing thickness result in a striking non-monotonic evolution of the charge density wave transition temperature in VSe2. Our conclusion is drawn from a direct derivation of the local order parameter and transition temperature from the real space charge modulation amplitude imaged by scanning tunnelling microscopy. This study lifts the disagreement of previous independent transport measurements. We find that thickness can be a non-trivial tuning parameter and demonstrate the importance of considering a finite thickness range to accurately characterize its influence.

  • Thickness dependence
  • Charge density wave
  • Dimensional crossover
  • Vanadium diselenide
  • Scanning tunneling microscopy, phase transition
  • In situ exfoliation
Research group
  • Swiss National Science Foundation - 147607
Citation (ISO format)
PASZTOR, Arpad et al. Dimensional crossover of the charge density wave transition in thin exfoliated VSe<sub>2</sub>. In: 2D Materials, 2017, vol. 4, n° 4, p. 041005. doi: 10.1088/2053-1583/aa86de
Main files (1)
Article (Published version)
ISSN of the journal2053-1583

Technical informations

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