Chaotic motion and suppression of commensurability effects in an Andreev antidot billiard

被引：5
|
作者：
Eroms, J [1 ]
Tolkiehn, M
Weiss, D
Rössler, U
De Boeck, J
Borghs, S
机构：
[1] Univ Regensburg, Inst Expt & Angew Phys, D-93040 Regensburg, Germany
[2] IMEC, B-3001 Louvain, Belgium
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2002年 / 12卷 / 1-4期
关键词：
magnetotransport; antidot latticed; Nb dot array; InAs; chaos;
D O I：
10.1016/S1386-9477(01)00409-X
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We investigated antidot lattices with Andreev reflecting boundaries both in experiment and theory. The samples consist of arrays of niobium-filled antidots in an InAs-based heterostructure. The quality of the Nb-InAs contact could be controlled by an in situ Ar sputter cleaning step. In samples with a high transparency contact, we find a strong reduction of the resistance around B = 0 and a suppression of the commensurability peaks. These observations can be explained in a classical Kubo approach by including Andreev reflection and assuming a magnetic-field-dependent Andreev reflection probability. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：918 / 921
页数：4
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