Photoinduced Reconstruction of Electronic Structure in Half-Metal CrO2

WU Xue-Wei; NIU Dong-Lin; LIU Xiao-Jun

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Photoinduced Reconstruction of Electronic Structure in Half-Metal CrO2

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We investigate the photoinduced effects on the electronic structure for haft-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 3dr2g 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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《中国物理快报：英文版》 |2007年第12期|3509-3512|共4页
作者
WU Xue-Wei; NIU Dong-Lin; LIU Xiao-Jun;
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Department of Electronic Science and Engineering,Key Lab of Modern Acoustics of MOE,Nanfing University, Nanjing 210093;

Department of Electronic Science and Engineering,Key Lab of Modern Acoustics of MOE,Nanfing University, Nanjing 210093;

Department of Electronic Science and Engineering,Key Lab of Modern Acoustics of MOE,Nanfing University, Nanjing 210093;

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中图分类物理学;
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Photoinduced Reconstruction of Electronic Structure in Half-Metal CrO2

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