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The Development And Implementation Of Systems To Study The Physical Properites Of Tantalum Trisulfide And Small-Molecule Organic Semiconductors, Hao Zhang

Theses and Dissertations--Physics and Astronomy

The charge-density-wave (CDW) material orthorhombic tantalum trisulfide (TaS₃) is a quasi-one dimensional material that forms long ribbon shaped crystals, and exhibits unique physical behavior. We have measured the dependence of the hysteretic voltage-induced torsional strain (VITS) in TaS₃, which was first discovered by Pokrovskii et. al. in 2007, on temperature and applied torque. Our experimental results shows that the application of torque to the crystal could also change the VITS time constant, magnitude, and sign. This suggests that the VITS is a consequence of residual torsional strain originally present in the sample which twists the polarizations …