Observation of phonon modes in epitaxial PbTe films grown by molecular beam epitaxy
Observation of phonon modes in epitaxial PbTe films grown by molecular beam epitaxy
复制标题
分子束外延生长的外延 PbTe 薄膜中声子模式的观察
DOI:
10.1063/1.2714682
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发表时间:
2007-05
影响因子:
3.2
通讯作者:
中科院分区:
文献类型:
--
作者:
Phonon modes of PbTe films grown by molecular beam epitaxy have been studied by micro-Raman scattering. On the as-grown PbTe surface, strong TeO2 phonon vibrational modes were detected, which obscured the observation of the longitudinal optical (LO) phonons of PbTe in early conventional Raman scattering experiments. Existence of a TeO2 layer on the PbTe surface is confirmed by observation with x-ray photoemission spectroscopy. After removal of TeO2 by chemical etching, the LO phonons for PbTe films were unambiguously observed. Misfit strain accommodated in the epitaxial films makes the lattice distorted from cubic structure, which lowers the crystal symmetry and leads to observation of what would normally be Raman inactive LO phonon modes for PbTe.
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影响因子:
3.5
作者:
J. Ferraro
通讯作者:
J. Ferraro
影响因子:
8.6
作者:
R. Schaller;J. Pietryga;S. Goupalov;M. Petruska;S. Ivanov;V. Klimov
通讯作者:
R. Schaller;J. Pietryga;S. Goupalov;M. Petruska;S. Ivanov;V. Klimov
DOI:
10.1103/physrevb.36.7674
发表时间:
1987-11
期刊:
Physical review. B, Condensed matter
影响因子:
--
作者:
Olego;Shahzad;Petruzzello;Cammack
通讯作者:
Olego;Shahzad;Petruzzello;Cammack
DOI:
10.1098/rspa.1966.0182
发表时间:
1966-01-01
影响因子:
--
作者:
COCHRAN, W;COWLEY, RA;ELCOMBE, MM
通讯作者:
ELCOMBE, MM
影响因子:
4
作者:
Z. Feit;M. McDonald;R. Woods;V. Archambault;P. Mak
通讯作者:
Z. Feit;M. McDonald;R. Woods;V. Archambault;P. Mak