Structure of spectra of time-dependent piezophotoconductivity

Stakhira, Y.M.; Stakhira, R.Y.

doi:10.30970/jps.11.215

Cited by 2 publications

(3 citation statements)

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“…In this work, we analyze deformation-induced changes in the structure of electron states and their dynamics, when the layers become shifted with respect to one another (the shear deformation). This is a continuation of works [6][7][8], in which a mechanism of spectrum formation was proposed for the photoconductivity component that is proportional to the product of the light intensity and the mechanical stress. A substantial nonmonotonic dependence of the phase difference between the piezophotoconductivity current and the deformation force on the energy of interband transitions, which was found in those works, as well as the conditions for its realization, has to be clarified.…”

Section: Introductionsupporting

confidence: 66%

“…In works [8,9], the energy dependence of the time moments, when the energy degeneration of electronic states in the In 4 Se 3 layered crystals was eliminated, was estimated from the spectral dependence of the phase shift between the harmonic and the nonharmonic component of the piezophotocurrent. The structural modifications in the system of electron states in layered crystals that arise due to the shear deformation of layers can be efficietly used.…”

Section: Discussionmentioning

confidence: 99%

“…The structural changes in the energies of electron states associated with the layer shift controlled by deforming forces can be found experimentally from the time dependence of the harmonic component of the monochromatic light absorption factor, which plays the role of a monitor, within a single harmonic period. In works [7,8], such changes were estimated from the spectral dependence of the phase shift of the conductivity component that is proportional to the product of the light intensity and the mechanical stress with respect to the phase of a modulating force.…”

Section: Deformation-induced Changes In the Structure Of Electron Statesmentioning

confidence: 99%

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Structural Changes in the System of Electron States in a Shear-Deformed Layered Crystal

Stakhira¹,

Stakhira²

2017

Ukr. J. Phys.

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Changes in the structure of electron states in a layered crystal induced by a deformation giving rise to a relative shift of the layers have been analyzed. It is shown that if the deformation force has a low-frequency harmonic component, the period of the deformed lattice changes discretely, and the energy degeneration of the electron states becomes partially eliminated. A space-time deformation removes the energy degeneration for states, whose wave vectors have a component normal to the layer plane and equal to the component of the reciprocal lattice period in the deformed crystal along this direction. It also generates a discontinuity in the functional dependence of the energy on this component. Within a separate time period of perturbation, the energy degeneration becomes eliminated at different time moments, at which the lattice period along the shear direction is a multiple of the shift. The energies within this time interval can be identified with the use of a radio equipment, by detecting the time moments, when the density of electronic states drastically changes.

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Section: Introductionsupporting

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Section: Deformation-induced Changes In the Structure Of Electron Statesmentioning

confidence: 99%

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