期刊
PHYSICAL REVIEW B
卷 87, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.041301
关键词
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资金
- NRF [2010-0008529, 2011-0015631, 2010-0014109, 2011-0030789]
- National Research Foundation of Korea [2010-0008529, 2010-0014109, 2011-0030046, 2011-0015631, APCTP, 2011-0030789] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The phenomenon of Rashba spin-orbit coupling is examined theoretically for an ultrathin magnetic layer in contact with a nonmagnetic heavy-metal layer. From a first-principles calculation, a large Rashba parameter of order 1 eV angstrom is obtained, which makes the Rashba interaction a powerful tool for enhancing the spin-transfer torque. Interestingly, the magnitude and sign of the parameter vary from energy band to energy band, which we attribute to band-specific chiral ordering of the orbital angular momentum. We argue that the band dependence of the Rashba parameter provides a natural explanation for a host of recent experiments and may enhance the potential for device application of the Rashba-active magnetic layer. DOI: 10.1103/PhysRevB.87.041301
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