INFRARED-SPECTRA OF OPTICAL PHONONS IN SEMICONDUCTING LA2CUO4+X SINGLE-CRYSTALS

被引：15

作者：

BAZHENOV, AV ^{[1
]}

REZCHIKOV, KB ^{[1
]}

FURSOVA, TN ^{[1
]}

ZAKHAROV, AA ^{[1
]}

TSETLIN, MB ^{[1
]}

机构：

[1] RUSSIAN SCI CTR,KURCHATOV INST,MOSCOW 123182,RUSSIA

来源：

PHYSICA C | 1993年 / 214卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(93)90106-Z

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Far-infrared reflectivity spectra R(nu) in polarization E perpendicular-to C and DC-conductivity sigma(DC) have been studied in a semiconducting phase of La2CuO4+x, single crystals with various oxygen contents. The spectrum of infrared-active optical phonons has been obtained for stoichiometric La2CuO4. It has been shown that the phonon spectrum should be analyzed in a framework of the orthorhombic crystal structure at T less-than-or-equal-to 300 K. Extra lines have been found in the phonon spectrum upon doping the crystals with oxygen. The results of studying the temperature dependence of R(nu) and sigma(DC) allow one to interpret these features as vibrational modes, which are active in the Raman scattering spectrum and displayed in the IR spectrum due to their interaction with self-localized holes.

引用

页码：45 / 54

页数：10

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