Electronic Instability at High Flux-Flow Velocities in High-<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></mrow></math></span> Superconducting Films

S. G. Doettinger; R. P. Huebener; R. Gerdemann; A. Kühle; S. Anders; T. G. Träuble; J. C. Villégier

doi:10.1103/PhysRevLett.73.1691

Electronic Instability at High Flux-Flow Velocities in High- $T_{c}$ Superconducting Films

S. G. Doettinger, R. P. Huebener, R. Gerdemann, A. Kühle, S. Anders, T. G. Träuble, and J. C. Villégier

Phys. Rev. Lett. 73, 1691 – Published 19 September 1994

Abstract

At high flux-flow velocities in type-II superconductors the nonequilibrium distribution of the quasiparticles leads to an electronic instability and an abrupt switching into a state with higher electric resistivity, as predicted by Larkin and Ovchinnikov (LO). We report the first observation of this effect in a high-temperature superconductor, namely in epitaxial $c$ -axis oriented films of $Y {Ba}_{2} {Cu}_{3} O_{7 - δ}$ . Using the LO theory, we have extracted from our results the inelastic quasiparticle scattering rate $τ_{in}$ , which strongly decreases with decreasing temperature below $T_{c}$ .

Received 18 April 1994

DOI:https://doi.org/10.1103/PhysRevLett.73.1691

Authors & Affiliations

S. G. Doettinger¹, R. P. Huebener¹, R. Gerdemann¹, A. Kühle², S. Anders¹, T. G. Träuble¹, and J. C. Villégier³

¹Physikalisches Institut, Experimentalphysik II, Universität Tübingen, Morgenstelle 14, D-72076 Tübingen, Germany
²Physics Department, Technical University of Denmark, DK-2800 Lyngby, Denmark
³Laboratoire d'Electronique et de Technologie de l'Informatique-Commissariat à l'Energie Atomique-Technologies Avancées, 85x, F-38041 Grenoble, France