ELECTRONIC-STRUCTURE OF LA2-XSRXNIO4+DELTA STUDIED BY SOFT-X-RAY ABSORPTION AND EMISSION SPECTROSCOPIES

被引：5

作者：

BUTORIN, SM

GUO, JH

DUDA, LC

WASSDAHL, N

NORDGREN, J

KURMAEV, EZ

TOLOCHKO, SP

机构：

[1] RUSSIAN ACAD SCI, INST PHYS MET, Ekaterinburg, RUSSIA

[2] BYELARUSSIAN ACAD SCI, INST GEN & INORGAN CHEM, MINSK 220072, BELARUS

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1994年 / 235卷

关键词：

D O I：

10.1016/0921-4534(94)91748-5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The O-K x-ray absorption and emission measurements were performed on La2-xSrxNiO4+delta with different delta and x. For doped compounds, a prepeak is observed near the O 1s edge associated with doping-induced unoccupied O 2p states. The O-K x-ray emission spectra of La2-xSrxNiO4+delta exhibit changes in their profile with variation of the excitation energy through the O 1s edge which are due to the difference in the absorption cross section for inequivalent O sites and in the degree of the localization of unoccupied states. Analysis of the results obtained suggests that for the delta>0 sample the states in the O 1s prepeak are rather localized by trapping the induced holes in small anti-Jahn-Teller polaron while for the highly Sr-doped compounds these states have itinerant character and belong to mainly in-NiO2-plane oxygen.

引用

页码：1047 / 1048

页数：2

共 7 条

[1] ELECTRONIC-STRUCTURE OF LA2-XSRXNIO4 STUDIED BY PHOTOEMISSION AND INVERSE-PHOTOEMISSION SPECTROSCOPY [J].

EISAKI, H ;

UCHIDA, S ;

MIZOKAWA, T ;

NAMATAME, H ;

FUJIMORI, A ;

VANELP, J ;

KUIPER, P ;

SAWATZKY, GA ;

HOSOYA, S ;

KATAYAMAYOSHIDA, H .

PHYSICAL REVIEW B, 1992, 45 (21) :12513-12521

[2] ELECTRONIC-STRUCTURE OF LA2-XSRXCUO4 STUDIED BY SOFT-X-RAY-FLUORESCENCE SPECTROSCOPY WITH TUNABLE EXCITATION [J].

GUO, JH ;

BUTORIN, SM ;

WASSDAHL, N ;

SKYTT, P ;

NORDGREN, J ;

MA, Y .

PHYSICAL REVIEW B, 1994, 49 (02) :1376-1380

[3] UNOCCUPIED DENSITY OF STATES OF LA2-XSRXNIO4+DELTA STUDIED BY POLARIZATION-DEPENDENT X-RAY-ABSORPTION SPECTROSCOPY AND BREMSSTRAHLUNG ISOCHROMAT SPECTROSCOPY [J].

KUIPER, P ;

VANELP, J ;

SAWATZKY, GA ;

FUJIMORI, A ;

HOSOYA, S ;

DELEEUW, DM .

PHYSICAL REVIEW B, 1991, 44 (09) :4570-4575

[4]

KUIPER P, UNPUB

[5] SOFT-X-RAY EMISSION-SPECTROSCOPY USING MONOCHROMATIZED SYNCHROTRON RADIATION [J].

NORDGREN, J ;

BRAY, G ;

CRAMM, S ;

NYHOLM, R ;

RUBENSSON, JE ;

WASSDAHL, N .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1989, 60 (07) :1690-1696

[6] CRYSTAL-CHEMISTRY AND PHYSICAL-PROPERTIES OF LA2-XSRXNIO4(0 LESS-THAN-OR-EQUAL-TO X LESS-THAN-OR-EQUAL-TO 1.6) [J].

TAKEDA, Y ;

KANNO, R ;

SAKANO, M ;

YAMAMOTO, O ;

TAKANO, M ;

BANDO, Y ;

AKINAGA, H ;

TAKITA, K ;

GOODENOUGH, JB .

MATERIALS RESEARCH BULLETIN, 1990, 25 (03) :293-306

[7] ELECTRONIC-STRUCTURE OF LI-DOPED NIO [J].

VANELP, J ;

ESKES, H ;

KUIPER, P ;

SAWATZKY, GA .

PHYSICAL REVIEW B, 1992, 45 (04) :1612-1622

← 1 →