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Nanoscale electromechanical resonators as probes of the charge density wave transition in NbSe₂

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arxiv 1004.3453 v1 pith:IF5RPEA2 submitted 2010-04-20 cond-mat.mes-hall cond-mat.str-el

Nanoscale electromechanical resonators as probes of the charge density wave transition in NbSe₂

Shamashis Sengupta , Hari S. Solanki , Vibhor Singh , Sajal Dhara , Mandar M. Deshmukh This is my paper
classification cond-mat.mes-hall cond-mat.str-el
keywords chargedensityelasticnanoscalenbseresonatorstransitionwave
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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.

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