Spin noise spectroscopy of donor-bound electrons in ZnO

被引：16
|
作者：
Horn, H. [1 ]
Balocchi, A. [2 ]
Marie, X. [2 ]
Bakin, A. [3 ]
Waag, A. [3 ]
Oestreich, M. [1 ]
Huebner, J. [1 ]
机构：
[1] Leibniz Univ Hannover, Inst Festkorperphys, D-30167 Hannover, Germany
[2] Univ Toulouse, CNRS, INSA, LPCNO,UPS, F-31077 Toulouse, France
[3] Tech Univ Carolo Wilhelmina Braunschweig, Inst Semicond Technol, D-38106 Braunschweig, Germany
来源：
PHYSICAL REVIEW B | 2013年 / 87卷 / 04期
关键词：
QUANTUM DOTS; MAGNETIC-RESONANCE; RELAXATION; DYNAMICS;
D O I：
10.1103/PhysRevB.87.045312
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate the intrinsic spin dynamics of electrons bound to Al impurities in bulk ZnO by optical spin noise spectroscopy. Spin noise spectroscopy enables us to investigate the longitudinal and transverse spin relaxation time with respect to nuclear and external magnetic fields in a single spectrum. On one hand, the spin dynamic is dominated by the intrinsic hyperfine interaction with the nuclear spins of the naturally occurring Zn-67 isotope. We measure a typical spin dephasing time of 23 ns, in agreement with the expected theoretical values. On the other hand, we measure a third, very high spin dephasing rate which is attributed to a high defect density of the investigated ZnO material. Measurements of the spin dynamics under the influence of transverse as well as longitudinal external magnetic fields unambiguously reveal the intriguing connections of the electron spin with its nuclear and structural environment. DOI: 10.1103/PhysRevB.87.045312
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页数：5
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