Electric Dipole and Current Induced Spin Resonances of Shallow Donor in ZnO

E. Michaluka, J. Błoniarza, M. Pabichb, Z. Wilamowskia, b and A. Mycielskia aInstitute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland bDepartment of Mathematics and Computer Science, UWM,Żołnierska 14, 10-561 Olsztyn, Poland

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Received: 17 06 2006;

In this paper we present our observation of electric dipole spin resonance and current induced spin resonance in ZnO bulk crystals, both effects result from spin-orbit coupling. Electric dipole spin resonance originates from admixture of spin state due to spin-orbit interaction which leads to probability of spin-flip caused by electric component of microwave field. In current induced spin resonance phenomenon the electric component of microwave field induces electron motion leading to mean ac spin-orbit field that acts on electron spin. Spin-orbit interaction can be described in terms of the Rashba field, an effective magnetic field that induce spin resonance. In contrast to magnetic and electric dipole spin resonances the current induced resonance is characterized by dispersive-like line shape.

DOI: 10.12693/APhysPolA.110.263 PACS numbers: 71.55.Gs, 76.30.-v, 71.70.Ej