Charge density waves in exfoliated films of van der Waals materials: evolution of Raman spectrum in TiSe2.
Nano Lett
; 12(11): 5941-5, 2012 Nov 14.
Article
em En
| MEDLINE
| ID: mdl-23092208
ABSTRACT
A number of the charge-density-wave materials reveal a transition to the macroscopic quantum state around 200 K. We used graphene-like mechanical exfoliation of TiSe(2) crystals to prepare a set of films with different thicknesses. The transition temperature to the charge-density-wave state was determined via modification of Raman spectra of TiSe(2) films. It was established that the transition temperature can increase from its bulk value to ~240 K as the thickness of the van der Waals films reduces to the nanometer range. The obtained results are important for the proposed applications of such materials in the collective-state information processing, which require room-temperature operation.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Nano Lett
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Estados Unidos