Double-impurity doping-induced quantum critical behaviors in Sr1-xBaxTi1-yRuyO3

被引：4

作者：

Guo, Y. J. ^{[3
]}

Wei, T. ^{[3
]}

Zhu, C. ^{[3
]}

Wang, K. F. ^{[3
]}

Gao, X. S. ^{[4
]}

Guan, Y. Q. ^{[4
]}

Liu, J. -M. ^{[1
,2
]}

机构：

[1] Nanjing Univ, Nanjing Natl Lab Microstruct, Nanjing 210093, Peoples R China

[2] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China

[3] Nanjing Univ, Nanjing Natl Lab Microstruct, Nanjing 210093, Peoples R China

[4] S China Normal Univ, Guangzhou 510006, Guangdong, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2010年 / 107卷 / 07期

关键词：

INDUCED PHASE-TRANSITION; SUSCEPTIBILITY; SRTIO3;

D O I：

10.1063/1.3361080

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

It has been reported both experimentally and theoretically that the Ba2+-doping at the A-site of quantum paraelectric SrTiO3 suppresses the quantum fluctuations by activating the ferroelectric mode, while the Ru4+-doping at the B-site plays the opposite role. For a double-impurity doped SrTiO3, i. e., Sr1-xBaxTi1-yRuyO3, where the two types of opposite effects compete with each other, we propose an improved transverse-field Ising model in order to investigate the effect of the double-impurity doping on the quantum phase transitions and critical behaviors. The calculated quantum behavior is quite well consistent with experimental measurements. A linear relationship between the quantum critical doping concentrations for Ba2+ and Ru4+ is predicted, subsequently validated qualitatively by an anharmonic oscillator model. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3361080]

引用

页数：7

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