Nanoscale electromechanical resonators as probes of the charge density wave transition in NbSe\(_2\)

We study nanoelectromechanical resonators fabricated from suspended flakes of NbSe\(_2\) (thickness\(\sim\)30-50 nm) to probe charge density wave (CDW) physics at nanoscale. Variation of elastic and electronic properties accompanying the CDW phase transition (around 30 K) are investigated simultaneo...

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Bibliographic Details
Published inarXiv.org
Main Authors Sengupta, Shamashis, Solanki, Hari S, Singh, Vibhor, Dhara, Sajal, Deshmukh, Mandar M
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 20.04.2010
Subjects
Charge density waves
Elastic properties
Electric fields
Electronic properties
Energy gap
Fermi surfaces
Mixers
Modulus of elasticity
Order parameters
Phase transitions
Resistance
Resonators
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Summary:We study nanoelectromechanical resonators fabricated from suspended flakes of NbSe\(_2\) (thickness\(\sim\)30-50 nm) to probe charge density wave (CDW) physics at nanoscale. Variation of elastic and electronic properties accompanying the CDW phase transition (around 30 K) are investigated simultaneously using the devices as self-sensing heterodyne mixers. Elastic modulus is observed to change by 10 per cent, an amount significantly larger than what had been reported earlier in the case of bulk crystals. We also study the modulation of conductance by electric field effect, and examine its relation to the order parameter and the CDW energy gap at the Fermi surface.
ISSN:2331-8422
DOI:10.48550/arxiv.1004.3453