Abstract
This paper develops a theoretical picture for coherently controlling spin currents with two resonant transitions which bridge the Zeeman gap of a two-dimensional electron system. One spin flip transition is propelled by r.f. electron oscillations in a sloping magnetic field. The second transition is induced by microwaves. When both transitions are simultaneously resonant, spin flips are inhibited by a formation of a dark state. We calculate the probability of this dark state as the system crosses resonance and show that it fits the ESR peak in the resistance of a magnetic superlattice.
Original language | English |
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Pages (from-to) | 926-928 |
Number of pages | 3 |
Journal | Physica E-Low-Dimensional Systems & Nanostructures |
Volume | 42 |
Issue number | 4 |
DOIs | |
Publication status | Published - Feb 2010 |
Event | 18th International Conference on Electronic Properties of Two-Dimensional Systems - Kobe, Japan Duration: 19 Jul 2009 → 24 Jul 2009 |
Keywords
- inhomogeneous magnetic field
- spin resonance