ORBITAL STRUCTURE OF COPPER IN HIGH-TEMPERATURE SUPERCONDUCTORS

被引：17

作者：

KHOMSKII, DI ^{[1
]}

NEIMARK, EI ^{[1
]}

机构：

[1] PN LEBEDEV PHYS INST,MOSCOW,USSR

来源：

PHYSICA C | 1991年 / 173卷 / 5-6期

关键词：

D O I：

10.1016/0921-4534(91)90734-G

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The orbital structure of copper ions in high-T(c) cuprates is discussed in a localized picture. Experimental indications that the d(z)2-orbital becomes relevant, especially at high doping levels, are summarized. The possible mechanism of this effect, notably the crossing of d(x)2-y2 and d(z)2-levels with doping, is identified and corresponding numerical calculations are carried out. It is shown that e.g. for La(2-x)Sr(x)CuO4 the crossing of these levels may occur at x approximately 0.4. The consequences of this phenomenon for the stability of the system and for its superconductivity are briefly discussed.

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页码：342 / 346

页数：5

相关论文

共 16 条

[1] SYMMETRY OF THE 3D9 LIGAND HOLE INDUCED BY DOPING IN YBA2CU3O7-DELTA [J].

BIANCONI, A ;

DESANTIS, M ;

DICICCO, A ;

FLANK, AM ;

FONTAINE, A ;

LAGARDE, P ;

KATAYAMAYOSHIDA, H ;

KOTANI, A ;

MARCELLI, A .

PHYSICAL REVIEW B, 1988, 38 (10) :7196-7199

[2] CORRELATION BETWEEN MIXING OF CU-D ORBITALS AND TC DETERMINED BY POLARIZED CUL3XAS - EXPERIMENTAL-EVIDENCE FOR PAIRING MEDIATED BY D-D EXCITATIONS [J].

BIANCONI, A ;

CASTRUCCI, P ;

FABRIZI, A ;

POMPA, M ;

FLANK, AM ;

LAGARDE, P ;

KATAYAMAYOSHIDA, H ;

CALESTANI, G .

PHYSICA C, 1989, 162 :209-210

[3]

BIANCONI A, 1990, PREPRINT

[4]

BIANCONI A, 1990, 1990 P INT C SUP ICS, P448

[5] THE MODULATED STRUCTURE OF BI2SR3-XCAXCU2O8 - A COMMENSURATE MODEL FROM SINGLE-CRYSTAL X-RAY-DIFFRACTION DATA [J].

CALESTANI, G ;

RIZZOLI, C ;

FRANCESCONI, MG ;

ANDREETTI, GD .

PHYSICA C, 1989, 161 (5-6) :598-606

[6] VIRTUAL ELECTRIC QUADRUPOLE FLUCTUATIONS - A MECHANISM FOR HIGH-TC [J].

COX, DL ;

JARRELL, M ;

JAYAPRAKASH, C ;

KRISHNAMURTHY, HR ;

DEISZ, J .

PHYSICAL REVIEW LETTERS, 1989, 62 (18) :2188-2191

[7] CHEMICAL ASPECTS AND THE CORRELATED ELECTRONIC-STRUCTURE OF SUPERCONDUCTOR OXOCUPRATES [J].

ESCHRIG, H .

PHYSICA C, 1989, 159 (05) :545-560

[8] EFFECTIVE TRANSFER FOR SINGLETS FORMED BY HOLE DOPING IN THE HIGH-TC SUPERCONDUCTORS [J].

ESKES, H ;

SAWATZKY, GA ;

FEINER, LF .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 1989, 160 (5-6) :424-430

[9] OBSERVATION OF ORBITAL ORDERING IN K2CUF4 [J].

ITO, Y ;

AKIMITSU, J .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1976, 40 (05) :1333-1338

[10] ORBITAL AND MAGNETIC STRUCTURE OF 2-DIMENSIONAL FERROMAGNETS WITH JAHN-TELLER IONS [J].

KHOMSKII, DI ;

KUGEL, KI .

SOLID STATE COMMUNICATIONS, 1973, 13 (07) :763-766