PHONON ANOMALIES AND ELECTRON-LATTICE COUPLING IN INTERMEDIATE-VALENCE SM0.25Y0.75S

被引：81

作者：

BILZ, H

GUNTHERODT, G

KLEPPMANN, W

KRESS, W

机构：

[1] Max-Planck-Institut für Festkörperforschung

来源：

PHYSICAL REVIEW LETTERS | 1979年 / 43卷 / 27期

关键词：

D O I：

10.1103/PhysRevLett.43.1998

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electronic structure and the phonon dispersion curves of EuS, SmS, Sm0.75 Y0.25 S, and YS are analyzed. A five-parameter model is deduced which describes the phonon dispersion of Sm0.75 Y0.25 S quite well. Two nearest-neighbor Sm-S forces and three deformabilities are introduced, two of which are attributed to virtual f-d transitions with dipolar- and breathing"-type symmetry while the third is a quadrupolar-type sulfur deformability. The model suggests a strongly localized form of the microscopic theory. © 1979 The American Physical Society."

引用

页码：1998 / 2001

页数：4

共 30 条

[1] CHARGE-DENSITY DISTORTIONS AND LATTICE-DYNAMICS - GENERAL THEORY AND APPLICATION TO NB [J].

ALLEN, PB .

PHYSICAL REVIEW B, 1977, 16 (12) :5139-5146

[2]

ANDERSEN O, COMMUNICATION

[3]

APPELBAUM JA, 1978, PHYSICS TRANSITION M

[4] ELECTRONIC-STRUCTURE OF SM MONOCHALCOGENIDES [J].

BATLOGG, B ;

KALDIS, E ;

SCHLEGEL, A ;

WACHTER, P .

PHYSICAL REVIEW B, 1976, 14 (12) :5503-5514

[5]

BENNEMANN KH, UNPUBLISHED

[6]

Bilz H., 1979, PHONON DISPERSION RE

[7]

BILZ H, 1972, COMPUTATIONAL SOLID, P309

[8]

BIRGENEAU RJ, 1977, VALENCE INSTABILITIE, P49

[9] EVALUATION OF DEBYE-WALLER FACTORS IN RARE-EARTH MONOSULFIDES - EVIDENCE FOR SOFTENING OF OPTIC PHONONS IN MIXED VALENT SM0.7Y0.3S [J].

DERNIER, PD ;

WEBER, W ;

LONGINOTTI, LD .

PHYSICAL REVIEW B, 1976, 14 (08) :3635-3643

[10] COVALENCY AND DEFORMABILITY OF AG+-IONS IN LATTICE-DYNAMICS OF SILVER-HALIDES [J].

FISCHER, K ;

BILZ, H ;

HABERKOR.R ;

WEBER, W .

PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 1972, 54 (01) :285-294

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