2007 Fiscal Year Final Research Report Summary

Study on resonant effect of Zenet tunneling current

Research Project

Project/Area Number	17560282
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	Electronic materials/Electric materials
Research Institution	Osaka University
Principal Investigator	MORIFUJI Masato Osaka University, Department of Engineering, Assistant professor (00230144)
Project Period (FY)	2005 – 2007
Keywords	Zener tunneling current / Resonant effect / Electron wave intereference / Resonant tunneling
Research Abstract	The purpose of this study is to investigate resonant effect of Zener tunneling current in a p-i-n diode which has a quantum well or sup erlattice in the intrinsic region. In order to do it, first, we have developed a semiclassical theory to describe tunneling phenomena (M. Morifuji and J. Nishie, Physical Review B71, 035334 (2005)). Next, we developed a theory to describe formation process of a quantum state (K. Ikegami, M. Morifuji, et. al., Physica E33, 381-387 (2006)). By using these theories, we calculated Zener tunneling current in various conditions. and found conditions in which the resonant effect is dominant. Further, we extended these theories to the case of time dependent voltage and calculated Zener current under high-frequency AC voltage. We also applied these theories to the case of magnetic tunneling, that is spin-polarization exists.

(4 results)