Journal
NANO LETTERS
Volume 12, Issue 11, Pages 5941-5945Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl303365x
Keywords
Charge density waves; van der Waals materials; titanium diselenide; Raman spectrum modification
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Funding
- National Science Foundation (NSF)
- Semiconductor Research Corporation (SRC) Nanoelectronic Research Initiative (NRI) [2204.001, NSF-1124733, NEB-2020]
- Directorate For Engineering [1124733] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys [1124733] Funding Source: National Science Foundation
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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 TiSe2 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 TiSe2 films It was established that the transition temperature can increase from its bulk value to similar 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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