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Geometric spin–orbit coupling and chirality-induced spin selectivity.
- Source :
-
New Journal of Physics . Nov2020, Vol. 22 Issue 11, p1-7. 7p. - Publication Year :
- 2020
-
Abstract
- We report a new type of spin–orbit coupling (SOC) called geometric SOC. Starting from the relativistic theory in curved space, we derive an effective nonrelativistic Hamiltonian in a generic curve embedded into flat three dimensions. The geometric SOC is O(m−1), in which m is the electron mass, and hence much larger than the conventional SOC of O(m−2). The energy scale is estimated to be a hundred meV for a nanoscale helix. We calculate the current-induced spin polarization in a coupled-helix model as a representative of the chirality-induced spin selectivity. We find that it depends on the chirality of the helix and is of the order of 0.01ℏ per nm when a charge current of 1 μA is applied. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13672630
- Volume :
- 22
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- New Journal of Physics
- Publication Type :
- Academic Journal
- Accession number :
- 147573723
- Full Text :
- https://doi.org/10.1088/1367-2630/abc920