Detection of resonant torsional oscillations of the quasi
one-dimensional conductor TaS3 with the heterodyne mixing
technique
M. V. Nikitin, V. Ya. Pokrovskii, S. V. Zybtsev
Kotel’nikov Institute of Radio-engineering and
Electronics of RAS
Received
February 11, 2013 , after correction - February 19, 2013
Abstract. Proposed is the technique
for detection of torsional oscillations of whiskers of orthorhombic TaS3
– a quasi one-dimensional conductor with charge-density wave (CDW). The
technique is based on the frequency modulation of the voltage applied across
the sample. The torsional oscillations are induced by the intrinsic torque
arising in the CDW sample under electric field, and the conductivity modulation
is induced by the torsional strain of the sample. In this the technique is
essentially different from those applied before. It is promising for studies of
the high-frequency electromechanical properties of the CDW conductors,
including nanosized samples.
Keywords: charge-density wave,
torsional strain, nanomechanics, MEMS-NEMS, actuator, self-detection,
tensoresistance, heterodyne, elastic moduli.