Premium
Pressure‐Tuned Resonance Raman Scattering in InAs/GaSb Superlattices
Author(s) -
Lyapin S. G.,
Lomsadze A. V.,
Trojan I. A.,
Klipstein P. C.,
Mason N. J.,
Walker P. J.
Publication year - 1996
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221980142
Subject(s) - raman scattering , resonance (particle physics) , superlattice , scattering , condensed matter physics , raman spectroscopy , x ray raman scattering , dipole , chemistry , molecular physics , atomic physics , physics , optics , organic chemistry
We have performed a pressuretuned resonance Raman scattering study in short‐period GaSb/InAs SLs in the region of E 1 and E 1 + Δ 1 in GaSb. Resonance profiles for polarized Raman scattering by both LO and elastic interface modes reveal two electronic transitions with two different types of Fröhlich‐interaction‐induced scattering. The LO resonance at the E 1 gap displays strong interference and we attribute it to intrinsic intrasubband Fröhlich scattering, which is dipole allowed due to the difference in the degree of localization of the electron and hole wave functions. A new resonance enhancement peak, not present in the bulk, has been observed in between the E 1 and E 1 + Δ 1 gaps of GaSb. This resonance appears to be dominated by extrinsic Fröhlich scattering.