Mechanical resonance characteristics of a cylindrical semiconductor heterostructure containing a high-mobility two-dimensional electron gas

被引：1
|
作者：
Okamoto, H. [1 ]
Izumida, W. [2 ]
Hirayama, Y. [2 ,3 ,4 ]
Yamaguchi, H. [1 ]
Riedel, A. [5 ]
Friedland, K. -J. [4 ,5 ]
机构：
[1] NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan
[2] Tohoku Univ, Dept Phys, Aoba Ku, Sendai, Miyagi 9808578, Japan
[3] ERATO Nucl Spin Elect Project, Aoba Ku, Sendai, Miyagi 9808578, Japan
[4] Tohoku Univ, WPI AIMR, Aoba Ku, Sendai, Miyagi 9808577, Japan
[5] Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany
来源：
PHYSICAL REVIEW B | 2014年 / 89卷 / 24期
关键词：
NANOMECHANICAL RESONATORS; BACK-ACTION; FIELD;
D O I：
10.1103/PhysRevB.89.245304
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate the mechanical resonance characteristics of semiconductor rolled-up tubes containing a high-mobility two-dimensional electron gas (HM2DEG) by optical and electrical means. The observed mode frequencies are in an excellent agreement with the theoretically calculated frequencies for the ground bending and excited bending and axial modes. The effect of the curvature is to increase the frequencies of the ground bending modes and the axial wave modes, while decreasing the frequencies of the first excited bending modes. We find significant splitting of the bending and twisting modes by the residual stress effects due to axial shear relaxation in z-dependent modes. The HM2DEG interacts with the mechanical motion due to Eddy currents and embedded impedances. A prominent asymmetry appears in the vibration amplitude with respect to the direction of the magnetic field. This originates from the broken symmetry of the HM2DEG on the curved surfaces.
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收藏
页数：8
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