Bipolaron dynamics in pure and doped SrTiO3 and KTaO3 perovskite systems

被引：12

作者：

Levstik, A ^{[1
]}

Filipic, C ^{[1
]}

Bobnar, V ^{[1
]}

Pirc, R ^{[1
]}

机构：

[1] Jozef Stefan Inst, SI-1001 Ljubljana, Slovenia

来源：

APPLIED PHYSICS LETTERS | 2002年 / 81卷 / 21期

关键词：

D O I：

10.1063/1.1522828

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The dielectric relaxation in SrTiO3, Sr0.942Ca0.058TiO3, and K0.989Li0.011TaO3 was analyzed. While at higher temperatures the characteristic relaxation frequency follows the Arrhenius behavior, its value is temperature independent at low temperatures. It is shown that such a behavior is a consequence of the dynamic properties of bipolarons, which undergo a transition from thermally activated hopping to a tunneling regime. (C) 2002 American Institute of Physics.

引用

页码：4046 / 4048

页数：3

共 23 条

[1]

[Anonymous], PROGR LOW TEMPARATUR

[2]

[Anonymous], ELECT PROCESSES NANO

[3] SR1-XCAXTIO3 - AN XY QUANTUM FERROELECTRIC WITH TRANSITION TO RANDOMNESS [J].