Resonant quasiparticle-ion scattering in anisotropic superfluid 3He
Loading...
Journal Title
Journal ISSN
Volume Title
School of Science |
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Unless otherwise stated, all rights belong to the author. You may download, display and print this publication for Your own personal use. Commercial use is prohibited.
Author
Date
1990
Major/Subject
Mcode
Degree programme
Language
en
Pages
4142-4163
Series
Physical Review B, Volume 41, Issue 7
Abstract
Low-energy excitations in quantum fluids are most directly encountered by ions. In the superfluid phases of 3He the relevant elementary excitations are Bogoliubov quasiparticles, which undergo repeated scattering off an ion in the presence of a divergent density of states. We present a quantum-mechanical calculation of the resonant 3He quasiparticle-scattering-limited mobility for negative ions in the anisotropic bulk 3A (A phase) and 3P (polar phase) that is exact when the quasiparticles scatter elastically. We develop a numerical scheme to solve the singular equations for quasiparticle-ion scattering in the A and P phases. Both of these superfluid phases feature a uniaxially symmetric order parameter but distinct topology for the magnitude of the energy gap on the Fermi sphere, i.e., points versus lines of nodes. In particular, the perpetual orbital circulation of Cooper pairs in 3A results in a novel, purely quantum-mechanical intrinsic Magnus effect, which is absent in the polar phase, where Cooper pairs possess no spontaneous orbital angular momentum. This is of interest also for transport properties of heavy-fermion superconductors. We discuss the 3He quasiparticle-ion cross sections, which allow one to account for the mobility data with essentially no free parameters. The calculated mobility thus facilitates an introduction of ‘‘ion spectroscopy’’ to extract useful information on fundamental properties of the superfluid state, such as the temperature dependence of the energy gap in 3A.Description
Keywords
quantum fluids, ions, Bogoliubov quasiparticles, quantum-mechanical calculations
Other note
Citation
Salmelin, Riitta & Salomaa, M. M. 1990. Resonant quasiparticle-ion scattering in anisotropic superfluid 3He. Physical Review B. Volume 41, Issue 7. P. 4142-4163. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.41.4142.
