TY  - JOUR
AU  - Eckner, Stefanie
AU  - Johannes, Andreas
AU  - Gnauck, M.
AU  - Kämmer, H.
AU  - Steinbach, T.
AU  - Schönherr, S.
AU  - Chernikov, R.
AU  - Welter, E.
AU  - Ridgway, Mark
AU  - Schnohr, Claudia
TI  - Bond-stretching force constants and vibrational frequencies in ternary zinc-blende alloys: A systematic comparison of (In,Ga)P, (In,Ga)As and Zn(Se,Te)
JO  - epl
VL  - 126
IS  - 3
SN  - 1286-4854
CY  - Les-Ulis
PB  - EDP Science
M1  - PUBDB-2019-02482
SP  - 36002
PY  - 2019
N1  - (c) EPLA
AB  - We present element-specific effective bond-stretching force constants and Einstein frequencies of (In,Ga)P ternary alloys determined by temperature-dependent extended x-ray absorption fine structure spectroscopy. The bond-stretching force constants of both bond species show a nearly linear composition dependence between the values of GaP and InP. In contrast, the corresponding Einstein frequencies are different for the two bond species over the whole compositional range. Furthermore, we demonstrate that the composition dependence of bond-stretching force constants and Einstein frequencies for (In,Ga)P, (In,Ga)As, and Zn(Se,Te) is mostly caused by the associated bond length changes. Remaining deviations may be explained by coupling effects between different bond species within the alloy.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000471166100002
DO  - DOI:10.1209/0295-5075/126/36002
UR  - https://bib-pubdb1.desy.de/record/423222
ER  -