Resonance attenuation of ultrasonic waves in a superconductor with a moving vortex structure

Gutliansky, E. D.

doi:10.1134/1.1575316

Cited by 3 publications

(3 citation statements)

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“…[2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Meanwhile it has been shown 2-6 that an ultrasonic wave can drag the vortex structure in the superconductors. This phenomenon has also been observed experimentally.…”

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confidence: 99%

Amplification of ultrasonic waves by a moving vortex structure

Gutliansky

2002

Phys. Rev. B

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The interaction of a longitudinal ultrasonic wave with a moving vortex structure is considered for high-T c superconductors. It is found that this interaction contributes to the attenuation coefficient and the velocity of this wave. Expressions relating these contributions to the vortex structure velocity are derived. As the velocity of the vortex structure exceeds the wave velocity, the contribution to the attenuation coefficient is found to change its sign, and, hence, the wave can be amplified. This effect can be observed relatively easy in a periodic superconducting film structure when the electric current is passed through the film in the presence of the surface acoustic waves. Values of the current required to observe the amplification are estimated for selected ultrasonic frequencies.

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confidence: 99%

Amplification of ultrasonic waves by a moving vortex structure

Gutliansky

2002

Phys. Rev. B

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“…Theoretical analysis of the acousto-electric field in superconductors has been performed assuming the fully superconducting state with no normal current [7]; the normal electrons are 'clamped' to the lattice [4,5,11,12]. Using this assumption, the TDGL theory of Verkin and Kulik [15] (originally developed for the case of steady rotation when normal currents are absent) can be used to study the acousto-electric field.…”

Section: Introductionmentioning

confidence: 99%

“…The standard time-dependent Ginzburg-Landau theory (TDGL), which contains the assumption of local equilibrium, and is formulated in the laboratory frame, is a powerful tool to study phenomena in the vicinity of the superconducting-normal phase transition. To study gyroscopes [1], gravitational wave antennae [2] and the interaction of the superconducting condensate with strong sound waves [3,4,5,6,7,8,9,10,11,12,13], where the atomic lattice is in motion, an extension to TDGL is needed to accommodate the dynamical system.…”

Section: Introductionmentioning

confidence: 99%

Transverse acousto-electric effect in superconductors

Lipavský

Koláček

Lin³

2016

Physica C: Superconductivity and its Applications

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We formulate a theory based on the time-dependent Ginzburg Landau (TDGL) theory and Newtonian vortex dynamics to study the transverse acousto-electric response of a type-II superconductor with Abrikosov vortex lattice. When exposed to a transverse acoustic wave, Cooper pairs emerge from the the moving atomic lattice and moving electrons. As in the Tolman-Stewart effect in a normal metal, an electromagnetic field is radiated from the superconductor. We adapt the equilibrium-based TDGL theory to this non-equilibrium system by using a floating condensation kernel. Due to the interaction between normal and superconducting components, the radiated electric field as a function of magnetic field attains a maximum value occurring below the upper critical magnetic field. This local increase in electric field has weak temperature dependence and is suppressed by the presence of impurities in the superconductor.

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