EMPTY O2P(PI), STATES OF PRBA2CU3O7-DELTA

被引：9

作者：

HARTMANN, A

RUSSELL, GJ

机构：

[1] School of Physics, The University of New South Wales, Sydney

来源：

SOLID STATE COMMUNICATIONS | 1995年 / 95卷 / 11期

关键词：

HIGH-T-C; SUPERCONDUCTORS; NEXAFS; ELECTRONIC STATES (LOCALIZED); SYNCHROTRON RADIATION;

D O I：

10.1016/0038-1098(95)00293-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A systematic study of O1s-NEXAFS spectra from high oxygen content PTBa2CU3O6.9+/-0.1 and NdBa2CU3O6.9+/-0.1 Single crystals is presented and provides further information concerning our understanding of the suppression of (super)conductivity in PrBa2Cu3O7-delta In addition, O1s-NEXAFS spectra from Pr6O11 and Pr2O3 pressed powders indicate differences associated with the different Pr valence values. Both symmetry and density of empty O2p-hole states just above the Fermi level of PrBa2CU3O6.9+/-0.1 and NdBa2CU3O6.9+/-0.1 appear to be identical. Interpretation of the data does not indicate that the Pr valence value for PrBa2Cu3 O-6.9+/-0.1 is above 3+ or trapping of O2p-hole states occurs in O2p pi orbits which point towards the rare earth sites.

引用

页码：791 / 795

页数：5

共 29 条

[21] PRASEODYMIUM 3D-CORE AND 4D-CORE PHOTOEMISSION SPECTRA OF PR2O3 [J].

OGASAWARA, H ;

KOTANI, A ;

POTZE, R ;

SAWATZKY, GA ;

THOLE, BT .

PHYSICAL REVIEW B, 1991, 44 (11) :5465-5469

[22] ORBITAL CHARACTER OF STATES AT THE FERMI LEVEL IN LA2-XSRXCUO4 AND R2-XCEXCUO4 (R = ND,SM) [J].

PELLEGRIN, E ;

NUCKER, N ;

FINK, J ;

MOLODTSOV, SL ;

GUTIERREZ, A ;

NAVAS, E ;

STREBEL, O ;

HU, Z ;

DOMKE, M ;

KAINDL, G ;

UCHIDA, S ;

NAKAMURA, Y ;

MARKL, J ;

KLAUDA, M ;

SAEMANNISCHENKO, G ;

KROL, A ;

PENG, JL ;

LI, ZY ;

GREENE, RL .

PHYSICAL REVIEW B, 1993, 47 (06) :3354-3367

[23] UPPER CRITICAL-FIELD AND NORMAL-STATE PROPERTIES OF SINGLE-PHASE Y1-XPRXBA2CU3O7-DELTA COMPOUNDS [J].

PENG, JL ;

KLAVINS, P ;

SHELTON, RN ;

RADOUSKY, HB ;

HAHN, PA ;

BERNARDEZ, L .

PHYSICAL REVIEW B, 1989, 40 (07) :4517-4526

[24] THE PLANE GRATING AND ELLIPTICAL MIRROR - A NEW OPTICAL CONFIGURATION FOR MONOCHROMATORS [J].

PETERSEN, H .

OPTICS COMMUNICATIONS, 1982, 40 (06) :402-406

[25] REVISED EFFECTIVE IONIC-RADII AND SYSTEMATIC STUDIES OF INTERATOMIC DISTANCES IN HALIDES AND CHALCOGENIDES [J].

SHANNON, RD .

ACTA CRYSTALLOGRAPHICA SECTION A, 1976, 32 (SEP1) :751-767

[26] ALUMINUM SUBSTITUTION IN BA2YCU3O7 [J].

SIEGRIST, T ;

SCHNEEMEYER, LF ;

WASZCZAK, JV ;

SINGH, NP ;

OPILA, RL ;

BATLOGG, B ;

RUPP, LW ;

MURPHY, DW .

PHYSICAL REVIEW B, 1987, 36 (16) :8365-8368

[27] ROLE OF THE MADELUNG ENERGY IN HOLE CONDUCTIVITY IN COPPER OXIDES - DIFFERENCE BETWEEN SEMICONDUCTORS AND HIGH-TC SUPERCONDUCTORS [J].

TORRANCE, JB ;

METZGER, RM .

PHYSICAL REVIEW LETTERS, 1989, 63 (14) :1515-1518

[28]

VVEDENSKY DD, 1991, UNOCCUPIED ELECTRONI

[29] PHASE-DIAGRAM IN THE ND-BA-CU-O SYSTEM [J].

YOO, SI ;

MCCALLUM, RW .

PHYSICA C, 1993, 210 (1-2) :147-156

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