標題: Magnetization and magnetic susceptibility of InAs nano-rings
作者: Voskoboynikov, O
Lee, CP
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: nano-rings;magnetization;magnetic susceptibility
公開日期: 1-一月-2004
摘要: In this work, we investigate theoretically the magnetic susceptibility of the three-dimensional cut-torus-shaped quantum rings. The calculations are carried out for the realistic three-dimensional model of InAs/GaAs nano-rings with the hard-wall confinement potential, three-dimensional effective one-electronic-band Hamiltonian with position and energy-dependent effective mass, and Ben Daniel-Duke boundary conditions. This allows us to describe the penetration of the magnetic field into the torus region. At zero temperature, the ring's differential susceptibility demonstrates delta-like paramagnetic peaks, which are generated by aperiodic oscillations of magnetization. With increasing temperature, the peaks gradually transform into Lorenz-shaped peaks and then disappear. As opposed to meso-scopic quantum rings we found a dependence of the peak's amplitude on the dimensions of the rings. (C) 2003 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.physe.2003.08.018
http://hdl.handle.net/11536/27229
ISSN: 1386-9477
DOI: 10.1016/j.physe.2003.08.018
期刊: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
Volume: 20
Issue: 3-4
起始頁: 278
結束頁: 281
顯示於類別:會議論文


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