Collective orbital excitations in orbitally ordered YVO3 and HoVO3
Collective orbital excitations in orbitally ordered YVO3 and HoVO3
复制标题
轨道有序 YVO3 和 HoVO3 中的集体轨道激发
DOI:
10.1088/1367-2630/10/5/053027
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发表时间:
2008
影响因子:
3.3
通讯作者:
M. Grüninger
中科院分区:
文献类型:
--
作者:
Eva Benckiser;R. Rückamp;T. Möller;T. Taetz;Angela Möller;A. A. Nugroho;A. A. Nugroho;Thomas Palstra;G. Uhrig;M. Grüninger
We study orbital excitations in the optical absorption spectra of YVO3 and HoVO3. We focus on an orbital absorption band observed at 0.4 eV for polarization E∥c. This feature is only observed in the intermediate, monoclinic phase. By comparison with the local crystal-field (CF) excitations in VOCl and with recent theoretical predictions for the CF levels we show that this absorption band cannot be interpreted in terms of a local CF excitation. We discuss a microscopic model which attributes this absorption band to the exchange of two orbitals on adjacent sites, i.e. to the direct excitation of two orbitons. This model is strongly supported by the observed dependence on polarization and temperature. Moreover, the calculated spectral weight is in good agreement with the experimental result.
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影响因子:
41.2
作者:
Seongsu Lee;J-G. Park;J-G. Park;D. Adroja;D. Khomskii;S. Streltsov;K. McEwen;H. Sakai;K. Yoshimura;V. Anisimov;Daisuke Mori;R. Kanno;R. Ibberson
通讯作者:
Seongsu Lee;J-G. Park;J-G. Park;D. Adroja;D. Khomskii;S. Streltsov;K. McEwen;H. Sakai;K. Yoshimura;V. Anisimov;Daisuke Mori;R. Kanno;R. Ibberson
DOI:
10.1103/physrevb.62.2338
发表时间:
1998-12
期刊:
arXiv: Strongly Correlated Electrons
影响因子:
--
作者:
S. Ishihara;S. Maekawa
通讯作者:
S. Ishihara;S. Maekawa
DOI:
--
发表时间:
2005
期刊:
Phys. Rev. Lett. 94
影响因子:
--
作者:
S. Miyasaka;S. Onoda;Y. Okimoto;J. Fujioka;M. Iwama;N. Nagaosa;and Y. Tokura
通讯作者:
and Y. Tokura
DOI:
--
发表时间:
2004
期刊:
Phys.Rev.B 69
影响因子:
--
作者:
M. Jo;Y. Hayashi;H. Kumano;and I. Suemune;田端 正久;妹尾達彦;S.Ishihara
通讯作者:
S.Ishihara
DOI:
--
发表时间:
2006
期刊:
J. Phys. Soc. Jpn. 75
影响因子:
--
作者:
岡本 博;他;K.Nakamura;Y. Imai;Y.Imai;Y.Otsuka
通讯作者:
Y.Otsuka