A spectacular pressure-induced electronic transition in KTb(MoO4)(2)

被引：0

作者：

Jayaraman, A ^{[1
]}

Wang, SY ^{[1
]}

Sharma, SK ^{[1
]}

Cheong, SW ^{[1
]}

机构：

[1] AT&T BELL LABS,MURRAY HILL,NJ 07974

来源：

CURRENT SCIENCE | 1996年 / 70卷 / 03期

关键词：

D O I：

暂无

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Results of pressure Raman and optical absorption studies are reported for KTb(MoO4)(2). A phase transformation occurs at 27 kbar when the crystal is pressurized at ambient temperature, in a hydrostatic pressure medium, The sample changes to a deep yellow colour at the transition and visibly contracts in the a-axis direction, The colour shifts red on further pressure increase. The Raman spectral features and the X-ray powder pattern change abruptly at the transition indicating a structural change, The colour change is attributed to 4f-5d transition in Tb initiated by the structural transition, and consequent intervalence charge transfer between Tb and Mo.

引用

页码：232 / 234

页数：3

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