Charge disproportionation in quasi-one-dimensional vanadium oxides

被引：14

作者：

Ma, C. ^{[1
]}

Yang, H. X. ^{[1
]}

Li, Z. A. ^{[1
]}

Ueda, Y. ^{[2
]}

Li, J. Q. ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100080, Peoples R China

[2] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

来源：

SOLID STATE COMMUNICATIONS | 2008年 / 146卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

vanadium oxides; charge disproportionation; superconductivity;

D O I：

10.1016/j.ssc.2008.01.022

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The vanadium bronzes beta (beta')-A(x)V(2)O(5) (A = Na+, Ag+, Ca2+, Cu+) are investigated by electron energy-loss spectroscopy (EELS), X-ray absorption near edge spectroscopy and electronic structure calculations. We analysed the fine structural features of experimental spectra in the lowloss region and the vanadium L-2.3 and oxygen K ionization edges in correlation with electronic structure of this quasi -one-di mens i onal conducting system. The different energy separations on the fine structures of the vanadium L-3 edge and oxygen K edge arising from ligand field splitting suaaest chame disproportionation occurring in beta (beta')-A(x)V(2)O(5) materials at room temperature. Based on the analysis of the highly-damped valence electron plasmon peak for these materials, the charge distribution among different chains and ladders is briefly discussed. (c) 2008 Elsevier Ltd. All rights reserved.

引用

页码：30 / 34

页数：5

共 26 条

[1]

Blaha P., WIEN2K AUGMENTED PLA

[2] Experiments on ladders reveal a complex interplay between a spin-gapped normal state and superconductivity [J].

Dagotto, E .

REPORTS ON PROGRESS IN PHYSICS, 1999, 62 (11) :1525-1571

[3] 2P X-RAY ABSORPTION OF 3D TRANSITION-METAL COMPOUNDS - AN ATOMIC MULTIPLET DESCRIPTION INCLUDING THE CRYSTAL-FIELD [J].

DEGROOT, FMF ;

FUGGLE, JC ;

THOLE, BT ;

SAWATZKY, GA .

PHYSICAL REVIEW B, 1990, 42 (09) :5459-5468

[4] OXYGEN 1S X-RAY-ABSORPTION EDGES OF TRANSITION-METAL OXIDES [J].

DEGROOT, FMF ;

GRIONI, M ;

FUGGLE, JC ;

GHIJSEN, J ;

SAWATZKY, GA ;

PETERSEN, H .

PHYSICAL REVIEW B, 1989, 40 (08) :5715-5723

[5]

Egerton R. F., 1996, ELECT ENERGY LOSS SP

[6] Spin dynamics and charge order in β-Na1/3V2O5 -: art. no. 116402 [J].

Heinrich, M ;

von Nidda, HAK ;

Eremina, RM ;

Loidl, A ;

Helbig, C ;

Obermeier, G ;

Horn, S .

PHYSICAL REVIEW LETTERS, 2004, 93 (11) :116402-1

[7] Charge ordering in NaV6O15:: 51V NMR in a single crystal [J].

Itoh, M ;

Akimoto, N ;

Yamada, H ;

Isobe, M ;

Ueda, Y .

PHYSICA C, 2000, 341 (341-348) :2133-2134

[8] Charge disproportionation and metal-insulator transition in the quasi-one-dimensional conductor β-Na0.33V2O5:: 23Na NMR study of a single crystal [J].

Itoh, Masayuki ;

Yamauchi, Ichihiro ;

Kozuka, Tomokazu ;

Suzuki, Tomoyuki ;

Yamauchi, Touru ;

Yamaura, Jun-Ichi ;

Ueda, Yutaka .

PHYSICAL REVIEW B, 2006, 74 (05)

[9] First-principles study of quasi-one-dimensional β-Na0.33V2O5 [J].

Ma, C. ;

Xiao, R. J. ;

Yang, H. X. ;

Li, Z. A. ;

Zhang, H. R. ;

Liang, C. Y. ;

Li, J. Q. .

SOLID STATE COMMUNICATIONS, 2006, 138 (12) :563-566

[10] Improved comparison of low energy loss spectra with band structure calculations: the example of BN filaments [J].

Moreau, P ;

Cheynet, MC .

ULTRAMICROSCOPY, 2003, 94 (3-4) :293-303

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