skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Spin-Josephson effects in exchange coupled antiferromagnetic insulators

Journal Article · · Physical Review B
 [1];  [1];  [2];  [1];  [1]
  1. Univ. of California, Riverside, CA (United States); Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
  2. Univ. of New Hampshire, Durham, NH (United States)
+ Show Author Affiliations

The spin superfluid analogy can be extended to include Josephson-like oscillations of the spin current. In a system of two antiferromagnetic insulators (AFMIs) separated by a thin metallic spacer, a threshold spin chemical potential established perpendicular to the direction of the Néel vector field drives terahertz oscillations of the spin current. This spin current also has a nonlinear, time-averaged component which provides a “smoking gun” signature of spin superfluidity. The time-averaged spin current can be detected via the inverse spin Hall effect in a metallic spacer with large spin-orbit coupling. The physics illustrated here with AFMIs also applies to easy-plane ferromagnetic insulators. We suggest these findings may provide a new approach for experimental verification of spin superfluidity and realization of a terahertz spin oscillator.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES); Univ. of California, Riverside, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
SC0012670; ECCS-1408168
OSTI ID:
1388957
Alternate ID(s):
OSTI ID: 1326864
Journal Information:
Physical Review B, Vol. 94, Issue 9; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

References (28)

Terahertz Antiferromagnetic Spin Hall Nano-Oscillator journal May 2016
Nonlinear Field Theory of Large-Spin Heisenberg Antiferromagnets: Semiclassically Quantized Solitons of the One-Dimensional Easy-Axis Néel State journal April 1983
Superfluid Spin Transport Through Easy-Plane Ferromagnetic Insulators journal June 2014
Superfluid spin transport through antiferromagnetic insulators journal September 2014
Coherent energy transport in classical nonlinear oscillators: An analogy with the Josephson effect journal April 2015
Theory of interlayer magnetic coupling journal July 1995
Enhanced Gilbert Damping in Thin Ferromagnetic Films journal February 2002
Spin Pumping and Spin-Transfer Torques in Antiferromagnets journal July 2014
Magnon Mediated Electric Current Drag Across a Ferromagnetic Insulator Layer journal August 2012
Dissipationless Spin Transport in Thin Film Ferromagnets journal October 2001
Measurement of Spin-Wave Dispersion in NiO by Inelastic Neutron Scattering and Its Relation to Magnetic Properties journal November 1972
Nonlocal transport mediated by spin supercurrents journal December 2014
Interacting Electrons and Quantum Magnetism book January 1994
Hydrodynamic Theory of Spin Waves journal December 1969
Transmission of electrical signals by spin-wave interconversion in a magnetic insulator journal March 2010
Spin Superfluidity and Long-Range Transport in Thin-Film Ferromagnets journal December 2015
Ruderman-Kittel-Kasuya-Yosida range function of a one-dimensional free-electron gas journal September 1987
Possible new effects in superconductive tunnelling journal July 1962
Spin Hall effects journal October 2015
Observation of magnon-mediated current drag in Pt/yttrium iron garnet/Pt(Ta) trilayers journal March 2016
Spin currents and spin superfluidity journal April 2010
Dissipationless Spin Transport in Thin Film Ferromagnets text January 2001
Spin currents and spin superfluidity text January 2008
Magnon Mediated Electric Current Drag Across a Ferromagnetic Insulator Layer text January 2012
Superfluid spin transport through antiferromagnetic insulators text January 2014
Spin pumping and spin-transfer torques in antiferromagnets text January 2014
Coherent energy transport in classical nonlinear oscillators: an analogy with the Josephson effect text January 2014
Spin superfluidity and long-range transport in thin-film ferromagnets text January 2015

Cited By (4)

Spin current as a probe of quantum materials journal August 2019
Ultra-fast artificial neuron: generation of picosecond-duration spikes in a current-driven antiferromagnetic auto-oscillator journal October 2018
Experimental signatures of spin superfluid ground state in canted antiferromagnet Cr 2 O 3 via nonlocal spin transport journal April 2018
Ultra-fast artificial neuron: generation of picosecond-duration spikes in a current-driven antiferromagnetic auto-oscillator preprint January 2018

Similar Records

Synthetic antiferromagnet-based spin Josephson oscillator
Journal Article · Mon Mar 30 00:00:00 EDT 2020 · Applied Physics Letters · OSTI ID:1388957
+2 more
Quantum Spin Torque Driven Transmutation of an Antiferromagnetic Mott Insulator
Journal Article · Wed May 12 00:00:00 EDT 2021 · Physical Review Letters · OSTI ID:1388957
+1 more
Temperature dependence of angular momentum transport across interfaces
Journal Article · Thu Aug 11 00:00:00 EDT 2016 · Physical Review B · OSTI ID:1388957
+1 more

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
phonons
thermal conductivity
thermoelectric
spin dynamics
spintronics