Low-frequency suppression of random-telegraph-noise spectra in high-temperature superconductors

V. D. Ashkenazy; G. Jung; I. B. Khalfin; B. Ya. Shapiro

doi:10.1103/PhysRevB.51.1236

← Back to search

Low-frequency suppression of random-telegraph-noise spectra in high-temperature superconductors

V. D. Ashkenazy, G. Jung, I. B. Khalfin, B. Ya. Shapiro

DOI 10.1103/PhysRevB.51.1236 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

Interaction of the random-telegraph-noise signals with pinned Abrikosov vortices in granular high-temperature superconductors is investigated. It is shown that the low-frequency part of random-noise spectra is suppressed due to interaction of Abrikosov vortices with pinning centers at low magnetic fields and/or due to mutual interactions of vortices in an Abrikosov lattice at high magnetic fields. Values of characteristic frequencies below which spectra are suppressed are evaluated for various experimental configurations including a typical experimental thin-film strip geometry. It is shown that characteristic frequencies and the functional dependence of the low-frequency part of the noise spectra strongly depend on the external magnetic field.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown