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

页码：918 / 921

页数：4