| Original Articles |
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Photoinduced Reconstruction of Electronic Structure in Half-Metal CrO2 |
| WU Xue-Wei;NIU Dong-Lin;LIU Xiao-Jun |
| Department of Electronic Science and Engineering, Key Lab of ModernAcoustics of MOE, Nanjing University, Nanjing 210093 |
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| Cite this article: |
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WU Xue-Wei, NIU Dong-Lin, LIU Xiao-Jun 2007 Chin. Phys. Lett. 24 3509-3512 |
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Abstract We investigate the photoinduced effects on the electronic structure for half-metallic ferromagnet CrO2 (Tc～390K), 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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| Keywords:
73.50.Pz
31.15.-p
73.61.At
75.50.Cc
31.15.Ew
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Received: 03 September 2007
Published: 03 December 2007
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| PACS: |
73.50.Pz
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(Photoconduction and photovoltaic effects)
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31.15.-p
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(Calculations and mathematical techniques in atomic and molecular physics)
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73.61.At
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(Metal and metallic alloys)
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75.50.Cc
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(Other ferromagnetic metals and alloys)
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31.15.Ew
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