Thermal conductivity reduction in oxygen-deficient strontium titanates

被引：105

作者：

Yu, Choongho ^{[1
,2
]}

Scullin, Matthew L. ^{[3
]}

Huijben, Mark ^{[3
]}

Ramesh, Ramamoorthy ^{[2
,3
]}

Majumdar, Arun ^{[2
,4
]}

机构：

[1] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA

[2] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[4] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 19期

关键词：

D O I：

10.1063/1.2930679

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report significant thermal conductivity reduction in oxygen-deficient lanthanum-doped strontium titanate (Sr1-xLaxTiO3-delta) films as compared to unreduced strontium titanates. Our experimental results suggest that the oxygen vacancies could have played an important role in the reduction. This could be due to the nature of randomly distributed and clustered vacancies, which would be very effective to scatter phonons. Our results could provide a pathway for tailoring the thermal conductivity of complex oxides, which is very beneficial to various applications including thermoelectrics. (C) 2008 American Institute of Physics.

引用

页数：3

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