期刊
PHYSICAL REVIEW B
卷 99, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.99.180405
关键词
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资金
- Graduate School Materials Science in Mainz (MAINZ) [DFG GSC 266]
- Japan Society for the Promotion of Science [16K13853, 17H02929]
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan [26103006]
- Grants-in-Aid for Scientific Research [16K13853] Funding Source: KAKEN
A theoretical formulation for spin transport through an antiferromagnetic (AF) insulator is presented in a case that is driven/detected by the direct/inverse spin Hall effect in two heavy-metal contacts. The spin signal is shown to be transferred by the ferromagnetic correlation function of the antiferromagnet, which is calculated based on a magnon representation. To cover the high-temperature regimes, we include an auxiliary field representing short AF correlations and a temperature-dependent damping due to magnon scattering. The diffusion length for spin is long, close to the degeneracy of the two AF magnons, and has a maximum as a function of temperature near the Neel transition.
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