Journal
PHYSICAL REVIEW B
Volume 88, Issue 19, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.88.195402
Keywords
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Funding
- Methusalem program of the Flemish government
- Flemish Science Foundation (FWO-Vl)
- DFG SFB [689]
- NSF [DMR-1104788]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1104788] Funding Source: National Science Foundation
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The charge density relaxation propagator of a two-dimensional electron system, which is the slope of the imaginary part of the polarization function, exhibits singularities for bosonic momenta having the order of the spin-orbit momentum and depending on the momentum orientation. We have provided an intuitive understanding for this nonanalytic behavior in terms of the interchirality subband electronic transitions, induced by the combined action of Bychkov-Rashba (BR) and Dresselhaus (D) spin-orbit coupling. It is shown that the regular behavior of the relaxation propagator is recovered in the presence of only one BR or D spin-orbit field or for spin-orbit interaction with equal BR and D coupling strengths. This creates a new possibility to influence carrier relaxation properties by means of an applied electric field.
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