Revealing the insulating gap in α′-NaV2O5 with resonant inelastic x-ray scattering

被引：1

作者：

Bondino, F. ^{[1
]}

Barla, A. ^{[2
,3
]}

Schmitt, T. ^{[4
]}

Strocov, V. N. ^{[4
]}

Henry, J-Y ^{[5
]}

Sanchez, J-P ^{[5
]}

机构：

[1] IOM CNR, Lab TASC, I-34012 Trieste, Italy

[2] ALBA Synchrotron Light Source, E-08290 Barcelona, Spain

[3] ISM CNR, I-34012 Trieste, Italy

[4] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[5] SPSMS, UMR E CEA UJF Grenoble 1, F-38054 Grenoble, France

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2012年 / 24卷 / 32期

关键词：

SPIN-PEIERLS COMPOUND; EMISSION-SPECTROSCOPY; NAV2O5; TEMPERATURE; TRANSITION; HEAT;

D O I：

10.1088/0953-8984/24/32/325402

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We measured the low energy excitation spectrum of alpha'-NaV2O5 across its charge ordering and crystallographic phase transition with resonant inelastic x-ray scattering (RIXS) at the V L-3 edge. Exploiting the polarization dependence of the RIXS signal and the high resolution of the data, we reveal the excitation across the insulating gap at 1 eV and identify the excitations from occupied 3d(xy) bonding orbitals to unoccupied bonding 3d(xy) and 3d(yz)/3d(xz) orbitals. Furthermore we observe a progressive change of the electronic structure of alpha'-NaV2O5 induced by soft x-ray irradiation, with the appearance of features characteristic of sodium deficient NaxV2O5 (x < 1).

引用

页数：5

共 26 条

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