Understanding Multiferroic Hexagonal Manganites by Static and Ultrafast Optical Spectroscopy
Multiferroic hexagonal manganites ReMnO3 studied by optics are reviewed. Their electronic structures were revealed by static linear and nonlinear spectra. Two transitions located at ~1.7 eV and ~2.3 eV have been observed and attributed to the interband transitions from the lower-lying Mn3+dxy/dx2-y2...
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| Format: | Article |
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Wiley
2013-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2013/104806 |
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| author | Yu Ting Wang Chih Wei Luo Takayoshi Kobayashi |
| author_facet | Yu Ting Wang Chih Wei Luo Takayoshi Kobayashi |
| author_sort | Yu Ting Wang |
| collection | DOAJ |
| description | Multiferroic hexagonal manganites ReMnO3 studied by optics are reviewed. Their electronic structures were revealed by static linear and nonlinear spectra. Two transitions located at ~1.7 eV and ~2.3 eV have been observed and attributed to the interband transitions from the lower-lying Mn3+dxy/dx2-y2 and dxz/dyz states to the Mn3+d3z2-r2 state, respectively. These so-called d-d transitions exhibit a blueshift as decreasing temperatures and an extra blueshift near TN. This dramatic change indicates that the magnetic ordering seriously influences the electronic structure. On the other hand, the ultrafast optical pump-probe spectroscopy has provided the important information on spin-charge coupling and spin-lattice coupling. Because of the strongly correlation between electronic structure and magnetic ordering, the amplitude of the initial rising component in ΔR/R shows striking changes at the vicinity of TN. Moreover, the coherent optical and acoustic phonons were observed on optical pump-probe spectroscopy. Both the amplitude and dephasing time of coherent phonons also exhibit significant changes at TN, which provide the evidence for spin-lattice interaction in these intriguing materials. |
| format | Article |
| id | doaj-art-68824030374145839dfea5bbfc19c277 |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
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| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-68824030374145839dfea5bbfc19c2772025-02-03T05:48:21ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242013-01-01201310.1155/2013/104806104806Understanding Multiferroic Hexagonal Manganites by Static and Ultrafast Optical SpectroscopyYu Ting Wang0Chih Wei Luo1Takayoshi Kobayashi2Department of Electrophysics, National Chiao Tung University, Hsinchu 30010, TaiwanDepartment of Electrophysics, National Chiao Tung University, Hsinchu 30010, TaiwanDepartment of Electrophysics, National Chiao Tung University, Hsinchu 30010, TaiwanMultiferroic hexagonal manganites ReMnO3 studied by optics are reviewed. Their electronic structures were revealed by static linear and nonlinear spectra. Two transitions located at ~1.7 eV and ~2.3 eV have been observed and attributed to the interband transitions from the lower-lying Mn3+dxy/dx2-y2 and dxz/dyz states to the Mn3+d3z2-r2 state, respectively. These so-called d-d transitions exhibit a blueshift as decreasing temperatures and an extra blueshift near TN. This dramatic change indicates that the magnetic ordering seriously influences the electronic structure. On the other hand, the ultrafast optical pump-probe spectroscopy has provided the important information on spin-charge coupling and spin-lattice coupling. Because of the strongly correlation between electronic structure and magnetic ordering, the amplitude of the initial rising component in ΔR/R shows striking changes at the vicinity of TN. Moreover, the coherent optical and acoustic phonons were observed on optical pump-probe spectroscopy. Both the amplitude and dephasing time of coherent phonons also exhibit significant changes at TN, which provide the evidence for spin-lattice interaction in these intriguing materials.http://dx.doi.org/10.1155/2013/104806 |
| spellingShingle | Yu Ting Wang Chih Wei Luo Takayoshi Kobayashi Understanding Multiferroic Hexagonal Manganites by Static and Ultrafast Optical Spectroscopy Advances in Condensed Matter Physics |
| title | Understanding Multiferroic Hexagonal Manganites by Static and Ultrafast Optical Spectroscopy |
| title_full | Understanding Multiferroic Hexagonal Manganites by Static and Ultrafast Optical Spectroscopy |
| title_fullStr | Understanding Multiferroic Hexagonal Manganites by Static and Ultrafast Optical Spectroscopy |
| title_full_unstemmed | Understanding Multiferroic Hexagonal Manganites by Static and Ultrafast Optical Spectroscopy |
| title_short | Understanding Multiferroic Hexagonal Manganites by Static and Ultrafast Optical Spectroscopy |
| title_sort | understanding multiferroic hexagonal manganites by static and ultrafast optical spectroscopy |
| url | http://dx.doi.org/10.1155/2013/104806 |
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