Long wavelength longitudinal optical (LO) and transverse optical (TO) phonons of BeSe and ZnxBe1−xSe layers are identified in a wide composition range by using Raman spectroscopy. A two-mode behavior is clearly evidenced. As predicted by the dielectric model of Hon and Faust, the eigenfrequencies of the BeSe- and ZnSe-like LO modes correspond to the maxima of Im〈−ε(ω, x)−1〉. Excellent agreement is obtained with a model where the calculations are performed by using the equations of motion and polarization derived from the modified random element isodisplacement model. Besides, the TO and LO frequencies for BeSe are determined to be 501 and 579 cm−1, respectively.

Topics
Phonons, Semiconductors, Dielectric properties, Epitaxy, Raman spectroscopy
1.
C. Vèrié, in Semiconductors Heteroepitaxy, edited by B. Gil and R. L. Aulombard (World Scientific, Singapore, 1995), p. 73.
2.
A.
Waag
,
F.
Fischer
,
K.
Schull
,
T.
Baron
,
H. J.
Lugauer
,
Th.
Litz
,
U.
Zehnder
,
W.
Ossau
,
T.
Gerhard
,
M.
Keim
,
G.
Reuscher
, and
G.
Landwerh
,
Appl. Phys. Lett.
70
,
280
(
1997
).
Crossref
Search ADS
 
3.
F.
Vigué
,
E.
Tournié
, and
J. P.
Faurie
,
Appl. Phys. Lett.
76
,
242
(
2000
).
Crossref
Search ADS
 
4.
K.
Wilmers
,
T.
Wethkamp
,
N.
Esser
,
C.
Cobet
,
W.
Richter
,
M.
Cardona
,
V.
Wagner
,
H.
Lugauer
,
F.
Fischer
,
T.
Gerhard
, and
M.
Keim
,
Phys. Rev. B
59
,
10071
(
1999
).
Crossref
Search ADS
 
5.
C.
Chauvet
,
E.
Tournié
, and
J. P.
Faurie
,
Phys. Rev. B
61
,
5332
(
2000
).
Crossref
Search ADS
 
6.
D. T.
Hon
and
W. L.
Faust
,
Appl. Phys.
1
,
241
(
1973
).
Crossref
Search ADS
 
7.
I. F.
Chang
and
S. S.
Mitra
,
Phys. Rev. B
172
,
924
(
1968
).
Crossref
Search ADS
 
8.
C.
Chauvet
,
P.
Venneguès
,
P.
Brunet
,
E.
Tournié
, and
J. P.
Faurie
,
Appl. Phys. Lett.
73
,
957
(
1998
).
Crossref
Search ADS
 
9.
O.
Pagès
,
M. A.
Renucci
,
O.
Briot
, and
R. L.
Aulombard
,
J. Appl. Phys.
77
,
1241
(
1995
).
Crossref
Search ADS
 
10.
U.
Fano
,
Phys. Rev. B
124
,
1866
(
1961
).
Crossref
Search ADS
 
11.
F.
Cerdeira
,
T. A.
Fjeldly
, and
M.
Cardona
,
Phys. Rev. B
8
,
4734
(
1973
).
Crossref
Search ADS
 
12.
F.
Demangeot
,
J.
Groenen
,
J.
Frandon
, and
M. A.
Renucci
,
Appl. Phys. Lett.
72
,
2674
(
1998
).
Crossref
Search ADS
 
13.
J.
Groenen
,
R.
Carles
,
G.
Landa
,
C.
Guerret-Piécourt
,
C.
Fontaine
, and
M.
Gendry
,
Phys. Rev. B
58
,
10452
(
1998
).
Crossref
Search ADS
 
14.
C. Becker, U. Küster, R. Kruse, J. Geurts, H. Lugauer, F. Fischer, Th. Litz, A. Waag, and G. Landwehr, in Proceedings of the 23rd International Conference of the Physics of Semiconductors, ICPS, Berlin, Germany, 1996, edited by M. Scheffler and R. Zimmermann (World Scientific, Singapore, 1997), p. 249.
15.
C.
Vérié
,
J. Electron. Mater.
27
,
782
(
1998
).
Crossref
Search ADS
 
This content is only available via PDF.
© 2000 American Institute of Physics.
2000
American Institute of Physics
You do not currently have access to this content.