Far-infrared and transport properties of antidot arrays with broken symmetry

被引:73
作者
Lorke, A
Wimmer, S
Jager, B
Kotthaus, JP
Wegscheider, W
Bichler, M
机构
[1] Univ Munich, Sekt Phys, D-80539 Munich, Germany
[2] Tech Univ Munchen, Walter Schottky Inst, D-85748 Munchen, Germany
关键词
antidot arrays; commensurability effects; broken symmetry;
D O I
10.1016/S0921-4526(98)00121-5
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We investigate the high- and low-frequency magnetotransport of a square antidot lattice with a triangular basis. In the longitudinal magnetoresistance rho(xx)(B) we observe higher-order commensurability features which reflect skipping orbits along the straight edges of the antidots. A magnetic field asymmetry in the four-probe resistance along the y-direction allows us to test basic symmetry relations in the transport coefficients. Under far-infrared irradiation the broken symmetry of the antidot array leads to a lateral photo-voltage which is attributed to a lateral, ratchet-type mechanism. (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:312 / 316
页数:5
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