Indications of a T=0 quantum phase transition in SrTiO3

被引：25

作者：

Grupp, DE

Goldman, AM

机构：

[1] School of Physics and Astronomy, University of Minnesota, Minneapolis, MN

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.78.3511

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have been investigating the effects of electric fields on SrTiO3 for temperatures in the range from 1.6 to 50 K. Measurements of the electric-field-induced strain show a clear signature with increasing field of a crossover from electrostrictive to piezoelectric behavior. The strain versos voltage data scale to a single curve, which we interpret as evidence for a T = 0 quantum phase transition. The coefficient of electrostriction appears to diverge as T --> 0, further suggestive of a T = 0 phase transition.

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页码：3511 / 3514

页数：4

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