Raman frequencies and angular dispersion of polar modes in aluminum nitride and gallium nitride

被引：83

作者：

Filippidis, L ^{[1
]}

Siegle, H ^{[1
]}

Hoffmann, A ^{[1
]}

Thomsen, C ^{[1
]}

Karch, K ^{[1
]}

Bechstedt, F ^{[1
]}

机构：

[1] UNIV JENA,INST FESTKORPERTHEORIE & THEORET OPT,D-07743 JENA,GERMANY

来源：

PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 1996年 / 198卷 / 02期

关键词：

D O I：

10.1002/pssb.2221980207

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We performed angular-resolved Raman-scattering experiments on AW and GaN both grown in the wurtzite structure. Our measurements reveal that the transverse polar modes in AlN and GaN show a pronounced angular dispersion. We varied the angle between the phonon-propagation direction and the optical axis between 41 degrees and 90 degrees and observed a frequency shift of the A(1)(TO) mode in the range of 28 cm(-1) in AlN and of 15 cm(-1) in GaN. The experimental values agree well with our theoretical calculations which were carried out using the DFT-LDA plane-wave pseudopotential method.

引用

页码：621 / 627

页数：7

共 20 条

[1] FIRST-ORDER RAMAN EFFECT IN WURTZITE-TYPE CRYSTALS [J].

ARGUELLO, CA ;

ROUSSEAU, DL ;

PORTO, SPS .

PHYSICAL REVIEW, 1969, 181 (03) :1351-&

[2]

CARDONA M, 1982, TOP APPL PHYS, V50, P45

[3] SPECIAL POINTS IN BRILLOUIN ZONE [J].

CHADI, DJ ;

COHEN, ML .

PHYSICAL REVIEW B, 1973, 8 (12) :5747-5753

[4] THIN-FILMS AND DEVICES OF DIAMOND, SILICON-CARBIDE AND GALLIUM NITRIDE [J].

DAVIS, RF .

PHYSICA B, 1993, 185 (1-4) :1-15

[5] ABINITIO CALCULATION OF PHONON DISPERSIONS IN SEMICONDUCTORS [J].

GIANNOZZI, P ;

DE GIRONCOLI, S ;

PAVONE, P ;

BARONI, S .

PHYSICAL REVIEW B, 1991, 43 (09) :7231-7242

[6]

Karch K, 1996, INST PHYS CONF SER, V142, P967

[7] AB-INITIO CALCULATION OF STRUCTURAL AND LATTICE-DYNAMICAL PROPERTIES OF SILICON-CARBIDE [J].

KARCH, K ;

PAVONE, P ;

WINDL, W ;

SCHUTT, O ;

STRAUCH, D .

PHYSICAL REVIEW B, 1994, 50 (23) :17054-17063

[8] STABILITY OF WURTZITE STRUCTURE [J].

LAWAETZ, P .

PHYSICAL REVIEW B, 1972, 5 (10) :4039-&

[9] RAMAN EFFECT IN CRYSTALS [J].

LOUDON, R .

ADVANCES IN PHYSICS, 1964, 13 (52) :423-&

[10]

LOUGHIN S, 1994, IEE, P175

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