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Title: Exploiting Coherence in Nonlinear Spin-Superfluid Transport

Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
Grant/Contract Number:
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 119; Journal Issue: 18; Related Information: CHORUS Timestamp: 2017-11-03 10:26:14; Journal ID: ISSN 0031-9007
American Physical Society
Country of Publication:
United States

Citation Formats

Tserkovnyak, Yaroslav, and Kläui, Mathias. Exploiting Coherence in Nonlinear Spin-Superfluid Transport. United States: N. p., 2017. Web. doi:10.1103/PhysRevLett.119.187705.
Tserkovnyak, Yaroslav, & Kläui, Mathias. Exploiting Coherence in Nonlinear Spin-Superfluid Transport. United States. doi:10.1103/PhysRevLett.119.187705.
Tserkovnyak, Yaroslav, and Kläui, Mathias. 2017. "Exploiting Coherence in Nonlinear Spin-Superfluid Transport". United States. doi:10.1103/PhysRevLett.119.187705.
title = {Exploiting Coherence in Nonlinear Spin-Superfluid Transport},
author = {Tserkovnyak, Yaroslav and Kläui, Mathias},
abstractNote = {},
doi = {10.1103/PhysRevLett.119.187705},
journal = {Physical Review Letters},
number = 18,
volume = 119,
place = {United States},
year = 2017,
month =

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 3, 2018
Publisher's Accepted Manuscript

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  • It is shown that spin relaxation in /sup 3/He-B with the external field switched off is characterized by the polarization of the motion of the spin vector and of the order parameter. For the constant GAMMA/sub parallel//..cap omega../sub L/ equal to 0.1, the switched-off field must be of the order of > or approx. = 19 G.
  • The propagation of a spin-entropy wave in superfluid {sup 3}He-{ital A}{sub 1} was observed in a cylindrical chamber with the magnetic field applied perpendicular to the chamber axis. A strong nonlinear response was observed as a function of drive amplitude. When the drive is relatively small, the resonant response is hysteretic and is dependent on the direction of frequency sweep through the resonance. When the drive is increased to a sufficiently large value, the response reverts to nearly linear dependence. {copyright} {ital 1996 The American Physical Society.}
  • We have measured magnetic field distortion of the order parameter and the longitudinal resonance frequency of superfluid {sup 3}He-{ital B} using pulsed nuclear magnetic resonance. The experiments were guided by numerical solutions of Leggett{close_quote}s equations which we have generalized to include gap distortion. We have found stable regions for the nonlinear spin dynamics and taken advantage of this to obtain the first measurements of the temperature dependence of the distortion of the energy gap in the {ital B} phase. At low temperatures and pressures the results agree with theoretical predictions of Fishman and Sauls. {copyright} {ital 1996 The American Physicalmore » Society.}« less
  • A previous approach to spin dynamics in superfluid $sup 3$He is generalized to the nonlinear regime, where the direction of the order parameter has large deviations from its equilibrium position. The results are used to study the hydrodynamic regime, to derive an equation for the nonlinear regime in the ringing experiments, and to consider the nonlinear effects arising in spin- echo experiments for small tipping angles. The results for the NMR linewidths (in the linear regime) are compared with a very recent work of Leggett and Takagi. Finally, the behavior of these linewidths is investigated at low temperature, where themore » hydrodynamic assumption $omega$tau very-much-less-than 1 is no longer valid. (AIP)« less