Metal-insulator transition in doped Ca2RuO4: Potential application in bolometric detection

被引：7

作者：

Fobes, D. ^{[1
]}

Vehstedt, E. ^{[1
]}

Peng, J. ^{[1
]}

Wang, G. C. ^{[1
]}

Liu, T. J. ^{[1
]}

Mao, Z. Q. ^{[1
]}

机构：

[1] Tulane Univ, Dept Phys & Engn Phys, New Orleans, LA 70118 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 111卷 / 08期

关键词：

THIN-FILMS; ARRAY;

D O I：

10.1063/1.4704387

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report that the first-order metal-insulator (MI) transition in perovskite ruthenate Ca2RuO4 can be tuned to a nearly second order transition with the transition temperature close to room temperature via Sr, Ti, and Fe chemical doping. The resistivity near this transition ranges from 10(-2) - 10(-1) Omega-cm. The maximum temperature coefficient of resistance TCR(= -(1/R)dR/dT near the transition exceeds 0.4K(-1). This MI transition can also be tuned by a relatively small bias-current. These properties suggest that doped calcium ruthenates can be considered an alternative material for improving upon existing bolometric technologies. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4704387]

引用

页数：4

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