Torsional Strain of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>TaS</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>Whiskers on the Charge-Density Wave Depinning

Pokrovskiǐ, V. Ya.; Зыбцев, С. Г.; Gorlova, I. G.

doi:10.1103/physrevlett.98.206404

Cited by 35 publications

(26 citation statements)

References 23 publications

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“…24,30,31 Besides, thinner samples are expected to show higher vibration amplitudes. 13 Note that detection of high-frequency noise in voltage is complicated because of the parasite capacitance of the amplifier, especially for high-ohmic samples. This problem does not concern the mechanical oscillations, as the transfer of the dc current into ac mechanical oscillations is direct.…”

Section: Discussionmentioning

confidence: 99%

“…A micromirror (3)-a laser-cut Ba 2 Sr 2 CaCu 2 O x whisker covered with a golden film-is stuck to the sample near the free end. 13 A two-sectional photodiode (4) is fixed near the cryostat; thus, the output signal from the amplifier (5) is proportional to the beam deflection, i.e., the torsional angle.…”

Section: Methodsmentioning

confidence: 99%

“…2,3 Electric-field-induced CDW deformation is known to reveal itself in enormous nonuniform strains of the samples. 13 The kinds of nonuniform strain are likely to be various, 14,15 but the most studied one is the torsional strain (TS). 13,16,17 The threshold and hysteretic field dependences of torsional angle, δϕ(E), clearly show that TS is coupled with the CDW deformation.…”

Section: Introductionmentioning

confidence: 99%

“…13 The kinds of nonuniform strain are likely to be various, 14,15 but the most studied one is the torsional strain (TS). 13,16,17 The threshold and hysteretic field dependences of torsional angle, δϕ(E), clearly show that TS is coupled with the CDW deformation. We have observed enormous TS for K 0.3 MoO 3 , (TaSe 4 ) 2 I, NbS 3 , but the most detailed studies were performed for TaS 3 , which has been taken for the present studies.…”

Section: Introductionmentioning

confidence: 99%

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Tunable harmonic vibrations of quasi one-dimensional conductors induced by sliding charge-density waves

2012

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We demonstrate that samples of quasi one-dimensional compounds show torsional vibrations induced by the sliding charge-density wave (CDW). Narrowband noise at the fundamental frequency is found in the vibrations spectra. The result suggests an approach to studies of the CDW dynamics and presents CDW conductors as tunable (ultra)sonic acoustoelectronic generators-unique solids vibrating under dc voltage.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tunable harmonic vibrations of quasi one-dimensional conductors induced by sliding charge-density waves

2012

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“…Different sample mounting schemes without resort to wires were also used, which is especially important for experiments with the thinnest samples. One scheme took advantage of the relationship between torsion and the presence of a polar axis in the sample that determined twist direction [54]. The sample was cut into halves transversely to conducting chains.…”

Section: Methods Of Torsion Studiesmentioning

confidence: 99%

High-frequency, 'quantum' and electromechanical effects in quasi-one-dimensional charge density wave conductors

Pokrovskiǐ¹,

Зыбцев²,

Nikitin³

et al. 2013

Usp. Fiz. Nauk

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Recent results (some previously unpublished) on the physics of charge density waves (CDWs) are reviewed. The synthesis conditions and unique properties of the quasi-onedimensional compound x Q , with highly coherent room temperature CDWs, are described. A peculiar type of`quantization' is discussed, which is observed in micro-and nanosamples of K 0X3 MoO 3 and NbSe 3 due to the discrete nature of CDW wave vector values. The electric-field-induced torsional strain (TS) in quasi-one-dimensional conductors is considered. Research results on the TS of a noise character induced by sliding CDWs are presented, along with those on the inverse effect, the modulation of the voltage induced by externally driven TS. Results on the nonlinear conduction of TiS 3 , a quasi-one-dimensional compound not belonging to the family of classical Peierls conductors, are also described. Contents 4.1 Nature of the deformation of quasi-one-dimensional conductors in an electric field; 4.2 Methods of torsion studies; 4.3 Main results of torsion studies; 4.4 Torsional effects associated with the sliding of a charge density wave; 4.5 Sample vibrations during the flow of a direct charge density wave current; 4.6 Nature of torsion; 4.7 Voltage modulation induced by torsional strain 5. Nonlinear conduction in the quasi-one-dimensional conductor TiS 3 45 6. Conclusions 46 References 47 30 V Ya Pokrovskii, S G Zybtsev, M V Nikitin, I G Gorlova, V F Nasretdinova, S V Zaitsev-Zotov Physics ± Uspekhi 56 (1) January 2013High-frequency,`quantum' and electromechanical effects in quasi-one-dimensional charge density wave conductors 31

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Theory of semiconductor solid and hollow nano‐ and microwires with hexagonal cross‐section under torsion

Grundmann

2015

Physica Status Solidi (b)

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The effect of torsion on false[00.1false]‐oriented wurtzite and false[111false]‐oriented zincblende nanowires with hexagonal cross‐section is discussed. The stresses (and strains) are determined via calculation of Prantl's stress function. The spatial variation of the valence band structure in the cross‐section is evaluated in the framework of the 6×6 valence band Hamiltonian and deformation potential theory. The shear strain induced potential leads to additional localization of holes in the center of the facets. In wurtzite wires, torsion does not evoke piezoelectric charges or potentials and thus does not impact the signal in piezotronic sensors. In zincblende wires, the second order piezoelectric effect causes piezoelectric charges with threefold symmetry. The strain distribution in hexagonal nanowires with rounded corners depends on the curvature radius of the corners. For finite corner radius, the strain does no longer vanish at the corners. Also hexagonal nanotubes are discussed; here the inner and outer boundary exhibit different strain distributions. Visualization of the distribution of shear stress τ=σxz2+σyz2 in the hexagonal cross‐section of a false[00.1false]‐oriented wurtzite nanowire under torsion.

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Torsional Strain ofTaS3Whiskers on the Charge-Density Wave Depinning

Cited by 35 publications

References 23 publications

Tunable harmonic vibrations of quasi one-dimensional conductors induced by sliding charge-density waves

Tunable harmonic vibrations of quasi one-dimensional conductors induced by sliding charge-density waves

High-frequency, 'quantum' and electromechanical effects in quasi-one-dimensional charge density wave conductors

Theory of semiconductor solid and hollow nano‐ and microwires with hexagonal cross‐section under torsion

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