ELECTRON-CORRELATION EFFECTS ON THE PROPERTIES OF LAXSR1-XTIO3

被引：11

作者：

RAMAKUMAR, R ^{[1
]}

JAIN, KP ^{[1
]}

KUMAR, R ^{[1
]}

CHANCEY, CC ^{[1
]}

机构：

[1] PURDUE UNIV CALUMET, DEPT PHYS & CHEM, HAMMOND, IN 46323 USA

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.50.10122

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A theoretical study of the electron-correlation effects on the properties of LaxSr1-xTiO3 is presented. Using a single band repulsive Hubbard model employing the Gutzwiller approximation we study the effect of electron correlations on the effective-mass, band narrowing, plasma frequency, and spin susceptibility. The doping dependence of these properties are found to be qualitatively in agreement with recent experimental studies on LaxSr1-xTiO3. We have also proposed a possibility for inducing superconductivity using the idea of proximity effect. The induced superconducting gap in LaxSr1-xTiO3 is predicted to be maximum near the half-filling of the Ti 3d band.

引用

页码：10122 / 10127

页数：6

共 22 条

[1] Application of Gutzwiller's variational method to the metal-insulator transition [J].

Brinkman, W. F. ;

Rice, T. M. .

PHYSICAL REVIEW B-SOLID STATE, 1970, 2 (10) :4302-4304

[2] REFLECTANCE AND RESISTIVITY OF BARELY METALLIC LATIO3 [J].

CRANDLES, DA ;

TIMUSK, T ;

GREEDAN, JE .

PHYSICAL REVIEW B, 1991, 44 (24) :13250-13254

[3] THE MIDINFRARED ABSORPTION IN RTIO3 PEROVSKITES (R = LA, CE, PR, ND, SM, GD) - THE HUBBARD GAP [J].

CRANDLES, DA ;

TIMUSK, T ;

GARRETT, JD ;

GREEDAN, JE .

PHYSICA C, 1992, 201 (3-4) :407-412

[4] OPTICAL-CONDUCTIVITY SPECTRA OF SR1-XLAXTIO3 - FILLING-DEPENDENT EFFECT OF THE ELECTRON CORRELATION [J].

FUJISHIMA, Y ;

TOKURA, Y ;

ARIMA, T ;

UCHIDA, S .

PHYSICAL REVIEW B, 1992, 46 (17) :11167-11170

[5] OPTICAL-SPECTRA OF TITANIUM-OXIDE PEROVSKITES WITH VARYING NUMBER OF D-ELECTRONS [J].

FUJISHIMA, Y ;

TOKURA, Y ;

ARIMA, T ;

UCHIDA, S .

PHYSICA C, 1991, 185 :1001-1002

[6] CORRELATION OF ELECTRONS IN A NARROW S BAND [J].

GUTZWILLER, MC .

PHYSICAL REVIEW, 1965, 137 (6A) :1726-+

[7] EFFECT OF CORRELATION ON FERROMAGNETISM OF TRANSITION METALS [J].

GUTZWILLER, MC .

PHYSICAL REVIEW, 1964, 134 (4A) :A923-+

[8] ELECTRON CORRELATIONS IN NARROW ENERGY BANDS .3. IMPROVED SOLUTION [J].

HUBBARD, J .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1964, 281 (1384) :401-+

[9] ELECTRON CORRELATIONS IN NARROW ENERGY BANDS [J].

HUBBARD, J .

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1963, 276 (1364) :238-+

[10] NEW FUNCTIONAL INTEGRAL APPROACH TO STRONGLY CORRELATED FERMI SYSTEMS - THE GUTZWILLER APPROXIMATION AS A SADDLE-POINT [J].

KOTLIAR, G ;

RUCKENSTEIN, AE .

PHYSICAL REVIEW LETTERS, 1986, 57 (11) :1362-1365

← 1 2 3 →