Many-Body Effects in the Excitation Spectrum of a Defect in SiC

被引：62

作者：

Bockstedte, Michel ^{[1
,2
,3
,4
]}

Marini, Andrea ^{[5
]}

Pankratov, Oleg ^{[4
]}

Rubio, Angel ^{[1
,2
,3
]}

机构：

[1] Univ Basque Country, Nanobio Spect Grp, Ctr Fis Mat, CSIC,EHU,MPC, E-20018 San Sebastian, Spain

[2] Univ Basque Country, ETSF Sci Dev Ctr, Ctr Fis Mat, CSIC,EHU,MPC,Dept Fis Mat, E-20018 San Sebastian, Spain

[3] DIPC, E-20018 San Sebastian, Spain

[4] Univ Erlangen Nurnberg, Lehrstuhl Theoret Festkorperphys, D-91058 Erlangen, Germany

[5] Univ Roma Tor Vergata, Dipartimento Fis, ETSF, I-0133 Rome, Italy

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 02期

关键词：

ELECTRON-PARAMAGNETIC-RESONANCE; CARBON VACANCY; 1ST-PRINCIPLES;

D O I：

10.1103/PhysRevLett.105.026401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that electron correlations control the photophysics of defects in SiC through both renormalization of the quasiparticle band structure and excitonic effects. We consider the carbon vacancy with two possible excitation channels that involve conduction and valence bands. Corrections to the Kohn-Sham ionization levels strongly depend on the defect charge state. Excitonic effects introduce a redshift of 0.23 eV. The analysis reassigns excitation mechanism at the thresholds in photoinduced paramagnetic resonance measurements [J. Dashdorj et al., J. Appl. Phys. 104, 113707 (2008)].

引用

页数：4

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