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We have measured the dependence of the hysteretic voltage-induced torsionalstrain (VITS) in crystals of orthorhombic tantalum trisulfide on temperatureand applied torque. In particular, applying square-wave voltages above thecharge-density-wave (CDW) threshold voltage, so as to abruptly switch thestrain across its hysteresis loop, we have found that the time constant for theVITS to switch (at different temperatures and voltages) varied as the CDWcurrent. Application of torque to the crystal could also change the VITS timeconstant, magnitude, and sign, suggesting that the VITS is a consequence ofresidual torsional strain in the sample which twist the CDW. Application ofvoltage changes the pitch of these CDW twists, which then act back on thelattice. However, it remains difficult to understand the sluggishness of theresponse.

Torque and temperature dependence of the hysteretic voltage-induced torsional strain in tantalum trisulfide