Low-energy V t2g orbital excitations in NdVO3

被引：6

作者：

Laverock, J. ^{[1
]}

Chen, B. ^{[1
]}

Preston, A. R. H. ^{[1
]}

Newby, D. ^{[1
]}

Piper, L. F. J. ^{[1
,2
]}

Tung, L. D. ^{[3
]}

Balakrishnan, G. ^{[3
]}

Glans, P-A ^{[4
]}

Guo, J-H ^{[4
]}

Smith, K. E. ^{[1
,5
,6
]}

机构：

[1] Boston Univ, Dept Phys, Boston, MA 02215 USA

[2] Binghamton Univ, Dept Phys Appl Phys & Astron, Binghamton, NY 13902 USA

[3] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[4] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Dept Phys, Berkeley, CA 94720 USA

[5] Univ Auckland, Sch Chem Sci, Auckland 1142, New Zealand

[6] Univ Auckland, MacDiarmid Inst Adv Mat & Nanotechnol, Auckland 1142, New Zealand

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2014年 / 26卷 / 45期

基金：

英国工程与自然科学研究理事会;

关键词：

resonant inelastic x-ray scattering; orbital excitations; crystal field excitations; ELEMENTARY EXCITATIONS; ORDER;

D O I：

10.1088/0953-8984/26/45/455603

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The electronic structure of NdVO3 and YVO3 has been investigated as a function of sample temperature using resonant inelastic soft x-ray scattering at the V L-3-edge. Most of the observed spectral features are in good agreement with an atomic crystal-field multiplet model. However, a low energy feature is observed at similar to 0.4 eV that cannot be explained by crystal-field arguments. The resonant behaviour of this feature establishes it as due to excitations of the V t(2g) states. Moreover, this feature exhibits a strong sample temperature dependence, reaching maximum intensity in the orbitally-ordered phase of NdVO3, before becoming suppressed at low temperatures. This behaviour indicates that the origin of this feature is a collective orbital excitation, i.e. the bi-orbiton.

引用

页数：9

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[11] Maximum entropy deconvolution of resonant inelastic x-ray scattering spectra [J].