Theoretical model for Rashba spin-orbit interaction in d electrons
Само за регистроване кориснике
2014
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We show that the Rashba spin-orbit interaction in d electron solids, which originates from the broken inversion symmetry at surfaces or interfaces, is strongly dependent on the orbital characters of the bands involved. This is studied by developing a tight-binding model in the presence of a uniform perpendicular electric field and spin-orbit coupling. We argue that for valence electrons, the spin-orbit coupling strength scales only as the square of the atomic number. The electric field distorts the d orbitals through the admixture of p and f states and also introduces intersite overlap parameters. Expressions for Rashba coefficients for the bands are obtained in both weak and strong spin-orbit interaction limits and are shown to be orbital dependent. The results are compared with first-principles calculations for model systems, showing good agreement. Our study demonstrates the orbital-dependent gate control of the Rashba effect for the purposes of oxide electronics.
Извор:
Physical Review B: Condensed Matter and Materials Physics, 2014, 90, 16Финансирање / пројекти:
- US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-FG02-00ER45818]
DOI: 10.1103/PhysRevB.90.165108
ISSN: 1098-0121; 1550-235X
WoS: 000342795100005
Scopus: 2-s2.0-84908032376
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Институција/група
VinčaTY - JOUR AU - Shanavas, K. V. AU - Popović, Zoran S. AU - Satpathy, Sashi PY - 2014 UR - https://vinar.vin.bg.ac.rs/handle/123456789/146 AB - We show that the Rashba spin-orbit interaction in d electron solids, which originates from the broken inversion symmetry at surfaces or interfaces, is strongly dependent on the orbital characters of the bands involved. This is studied by developing a tight-binding model in the presence of a uniform perpendicular electric field and spin-orbit coupling. We argue that for valence electrons, the spin-orbit coupling strength scales only as the square of the atomic number. The electric field distorts the d orbitals through the admixture of p and f states and also introduces intersite overlap parameters. Expressions for Rashba coefficients for the bands are obtained in both weak and strong spin-orbit interaction limits and are shown to be orbital dependent. The results are compared with first-principles calculations for model systems, showing good agreement. Our study demonstrates the orbital-dependent gate control of the Rashba effect for the purposes of oxide electronics. T2 - Physical Review B: Condensed Matter and Materials Physics T1 - Theoretical model for Rashba spin-orbit interaction in d electrons VL - 90 IS - 16 DO - 10.1103/PhysRevB.90.165108 ER -
@article{ author = "Shanavas, K. V. and Popović, Zoran S. and Satpathy, Sashi", year = "2014", abstract = "We show that the Rashba spin-orbit interaction in d electron solids, which originates from the broken inversion symmetry at surfaces or interfaces, is strongly dependent on the orbital characters of the bands involved. This is studied by developing a tight-binding model in the presence of a uniform perpendicular electric field and spin-orbit coupling. We argue that for valence electrons, the spin-orbit coupling strength scales only as the square of the atomic number. The electric field distorts the d orbitals through the admixture of p and f states and also introduces intersite overlap parameters. Expressions for Rashba coefficients for the bands are obtained in both weak and strong spin-orbit interaction limits and are shown to be orbital dependent. The results are compared with first-principles calculations for model systems, showing good agreement. Our study demonstrates the orbital-dependent gate control of the Rashba effect for the purposes of oxide electronics.", journal = "Physical Review B: Condensed Matter and Materials Physics", title = "Theoretical model for Rashba spin-orbit interaction in d electrons", volume = "90", number = "16", doi = "10.1103/PhysRevB.90.165108" }
Shanavas, K. V., Popović, Z. S.,& Satpathy, S.. (2014). Theoretical model for Rashba spin-orbit interaction in d electrons. in Physical Review B: Condensed Matter and Materials Physics, 90(16). https://doi.org/10.1103/PhysRevB.90.165108
Shanavas KV, Popović ZS, Satpathy S. Theoretical model for Rashba spin-orbit interaction in d electrons. in Physical Review B: Condensed Matter and Materials Physics. 2014;90(16). doi:10.1103/PhysRevB.90.165108 .
Shanavas, K. V., Popović, Zoran S., Satpathy, Sashi, "Theoretical model for Rashba spin-orbit interaction in d electrons" in Physical Review B: Condensed Matter and Materials Physics, 90, no. 16 (2014), https://doi.org/10.1103/PhysRevB.90.165108 . .