Electronic structure of Y2-xCaxBaNiO5 from photoemission and inverse photoemission

被引：29

作者：

Maiti, K ^{[1
]}

Sarma, DD

机构：

[1] Indian Inst Sci, Solid State & Struct Chem Unit, Bangalore 560012, Karnataka, India

[2] Indian Inst Sci, Jawaharlal Nehru Ctr Adv Sci Res, Bangalore 560012, Karnataka, India

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.58.9746

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the electronic structure of a one-dimensional spin-1 system, Y2BaNiO5, and hole-doped Y2-xCaxBaNiO5 for x=0.2 and 0.4, employing photoemission and inverse photoemission spectroscopies. Y2BaNiO5 has a charge excitation gap of about 2.3 eV. Hole doping via Ca substitution in this system introduces new localized states within this gap. The existence of a finite gap (similar to 0.6 eV), even in doped compounds with a variable-range-hopping transport, indicates the importance of correlation effects and disorder in determining the electronic structure in this system. [S0163-1829(98)01739-1].

引用

页码：9746 / 9751

页数：6

共 46 条

[1] RIGOROUS RESULTS ON VALENCE-BOND GROUND-STATES IN ANTIFERROMAGNETS [J].

AFFLECK, I ;

KENNEDY, T ;

LIEB, EH ;

TASAKI, H .

PHYSICAL REVIEW LETTERS, 1987, 59 (07) :799-802

[2] NEUTRON-DIFFRACTION STUDY OF THE MAGNETIC-STRUCTURE OF ER2BANIO5 [J].

ALONSO, JA ;

AMADOR, J ;

MARTINEZ, JL ;

RASINES, I ;

RODRIGUEZCARVAJAL, J ;

SAEZPUCHE, R .

SOLID STATE COMMUNICATIONS, 1990, 76 (04) :467-474

[3] HOLE AND ELECTRON DOPING OF R2BANIO5 (R = RARE-EARTHS) [J].

ALONSO, JA ;

RASINES, I ;

RODRIGUEZCARVAJAL, J ;

TORRANCE, JB .

JOURNAL OF SOLID STATE CHEMISTRY, 1994, 109 (02) :231-240

[4] EVIDENCE OF LOW-DIMENSIONAL ANTIFERROMAGNETIC ORDERING AND CRYSTAL-STRUCTURE IN THE Y,ER-2BANIO5 OXIDES [J].

AMADOR, J ;

GUTIERREZPUEBLA, E ;

MONGE, MA ;

RASINES, I ;

RUIZVALERO, C ;

FERNANDEZ, F ;

SAEZPUCHE, R ;

CAMPA, JA .

PHYSICAL REVIEW B, 1990, 42 (13) :7918-7924

[5] EXPERIMENTAL-EVIDENCE FOR THE HALDANE GAP IN A SPIN-1, NEARLY ISOTROPIC, ANTIFERROMAGNETIC CHAIN [J].

BUYERS, WJL ;

MORRA, RM ;

ARMSTRONG, RL ;

HOGAN, MJ ;

GERLACH, P ;

HIRAKAWA, K .

PHYSICAL REVIEW LETTERS, 1986, 56 (04) :371-374

[6] ELECTRONIC-STRUCTURE OF LA1-XSRXFEO3 [J].

CHAINANI, A ;

MATHEW, M ;

SARMA, DD .

PHYSICAL REVIEW B, 1993, 48 (20) :14818-14825

[7] ELECTRON SPECTROSCOPIC INVESTIGATION OF THE SEMICONDUCTOR-METAL TRANSITION IN LA1-XSRXMNO3 [J].

CHAINANI, A ;

MATHEW, M ;

SARMA, DD .

PHYSICAL REVIEW B, 1993, 47 (23) :15397-15403

[8] ELECTRONIC STATES IN LA2-XSRXCUO4+GAMMA PROBED BY SOFT-X-RAY ABSORPTION [J].

CHEN, CT ;

SETTE, F ;

MA, Y ;

HYBERTSEN, MS ;

STECHEL, EB ;

FOULKES, WMC ;

SCHLUTER, M ;

CHEONG, SW ;

COOPER, AS ;

RUPP, LW ;

BATLOGG, B ;

SOO, YL ;

MING, ZH ;

KROL, A ;

KAO, YH .

PHYSICAL REVIEW LETTERS, 1991, 66 (01) :104-107

[9] GROWTH OF THE OPTICAL CONDUCTIVITY IN THE CU-O PLANES [J].

COOPER, SL ;

THOMAS, GA ;

ORENSTEIN, J ;

RAPKINE, DH ;

MILLIS, AJ ;

CHEONG, SW ;

COOPER, AS ;

FISK, Z .

PHYSICAL REVIEW B, 1990, 41 (16) :11605-11608

[10] Spin dynamics of hole doped Y2-xCaxBaNiO5 [J].

Dagotto, E ;

Riera, J ;

Sandvik, A ;

Moreo, A .

PHYSICAL REVIEW LETTERS, 1996, 76 (10) :1731-1734

← 1 2 3 4 5 →