| Photoinduced Reconstruction of Electronic Structure in Half-Metal CrO2 |
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| 引用本文： | 吴雪炜 牛东林 刘晓峻. Photoinduced Reconstruction of Electronic Structure in Half-Metal CrO2[J]. 中国物理快报, 2007, 24(12): 3509-3512 |
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| 作者姓名： | 吴雪炜 牛东林 刘晓峻 |
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| 作者单位： | Department of Electronic Science and Engineering, Key Lab of Modern Acoustics of MOE, Nanjing University, Nanjing 210093 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10574071 and 10374041, the Key Project of Chinese Ministry of Education under Grant No 107051, and the Program for New Century Excellent Talents in Chinese University under Grant No NECT-04-045. |
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| 摘 要： | We investigate the photoinduced effects on the electronic structure for half-metallic ferromagnet CrO2 （Tc 390 K）, in which the conducting electrons are totally polarized, by using the LSDA＋U method. A significant change is found for the band structure and the density of states （DOS） for CrO2 under photo-excitation, especially for the Cr 3dt2g band： disappearance of the spin-split band, suggesting collapse of the half-metallic state. We ascribe the change of electronic structure under photo-excitation to the wider one-electron band W via the strong hybridization of the down-spin Cr 3d and O 2p states. Furthermore we discuss the magnetic properties under photo-excitation.
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| 关 键 词： | CrO2 半金属 光致重构 电子结构 |
| 收稿时间： | 2007-09-03 |
Photoinduced Reconstruction of Electronic Structure in Half-Metal CrO2 |
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| WU Xue-Wei,NIU Dong-Lin,LIU Xiao-Jun. Photoinduced Reconstruction of Electronic Structure in Half-Metal CrO2[J]. Chinese Physics Letters, 2007, 24(12): 3509-3512 |
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| Authors: | WU Xue-Wei NIU Dong-Lin LIU Xiao-Jun |
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| Affiliation: | Department of Electronic Science and Engineering, Key Lab of ModernAcoustics of MOE, Nanjing University, Nanjing 210093 |
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| Abstract: | |
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| Keywords: | 73.50.Pz 31.15.-p 73.61.At 75.50.Cc 31.15.Ew |
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