Hall voltage sign reversal in type II superconductors

Abstract

The Hall voltage sign reversal is consistently explained by the model in which vortices with the superconducting and normal state charge carriers are regarded as three subsystems mutually connected by interactions. The equations of motion for these three subsystems are solved simultaneously and a new formula for the Hall resistivity in the flux flow regime is obtained. It is shown that it is possible to explain qualitatively experimental data by this model.

Hall-effect anomaly nearTcand renormalized superconducting fluctuations inYBa2Puica1, Lang2, Göb3 et al. 2004Phys. Rev. B191180View full textAdd to dashboardCite

“…23,24 Most recent theories claim to predict the double or triple sign reversal, based ei-ther on entirely intrinsic mechanism of vortex motion and electronic spectrum, 25 or on hydrodynamic interaction between vortices and the superconducting and normal state fluids. 26 Some theories invoke superconducting fluctuations alone to account for the Hall effect sign reversal 27,28 , while others present a more extended picture based on the same foundations of TDGL using both the hydrodynamics and the vortex charging effect, arising from the difference in electron density between the core and the far outside region of the vortex. 21,22,29 Thus, the Hall effect in the mixed state of HTSC reflects a complex interplay between electronic properties of quasiparticles, thermodynamic fluctuations, hydrodynamic effects of vortices, and pinning.…”

Quantum Interference by Vortex Supercurrents

“…[58,59] A consistent demonstration of the change in distribution of transmitted QPs must involve a measurement realized through Hall probes at the input and output stubs. Hints on the valuable use of the Hall probes are indirectly provided by the sign-reversal effect [60,61] measured in planar films. In this regard, CPs, QPs, and vortices are considered mutually connected by the interactions, which can provide an edge imbalance charge measurable through the Hall resistance.…”

Engineering of superconductors and superconducting devices using artificial pinning sites

“…High-Tc materials typically reveal the, so-called, anomalous Hall effect (AHE), i.e. a sign inversion of the Hall signal below Tc [41][42][43][44][45][46][47][48][49][50]. A typical example is given in fig.…”