EVIDENCE FOR A STRONG SPIN-PHONON INTERACTION IN CUPRIC OXIDE

被引：118

作者：

CHEN, XK ^{[1
]}

IRWIN, JC ^{[1
]}

FRANCK, JP ^{[1
]}

机构：

[1] UNIV ALBERTA,DEPT PHYS,EDMONTON,AB T6G 2J1,CANADA

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.52.R13130

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

When CuO is cooled below its Neel temperature (T-N2=213 K) the onset of long-range magnetic order effectively increases the unit-cell dimensions and additional peaks, corresponding to zone-folded phonons, appear in the Raman spectrum. The zone-folding mechanism in CuO is unusual in that one of the folded phonons hardens significantly in frequency as the sample is further cooled below T-N2. It is shown that this dependence on temperature is determined by the sublattice magnetization and that the unusually large shift in frequency is caused by a strong spin-phonon interaction in cupric oxide.

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页码：13130 / 13133

页数：4

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