Multiple-charge-quanta shot noise in superconducting atomic contacts

被引：118

作者：

Cron, R ^{[1
]}

Goffman, MF ^{[1
]}

Esteve, D ^{[1
]}

Urbina, C ^{[1
]}

机构：

[1] CEA Saclay, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.86.4104

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured shot noise in aluminum atomic point contacts containing a small number of conduction channels of known transmissions. In the normal state, we find that the noise power is reduced from its Poissonian value and reaches the partition limit, as calculated from the transmissions. In the superconducting state, the noise reveals the large effective charge associated with each elementary transfer process. in excellent agreement with the predictions of the quantum theory of multiple Andreev reflections.

引用

页码：4104 / 4107

页数：4

共 24 条

[1] Supercurrent noise in quantum point contacts [J].

Averin, D ;

Imam, HT .

PHYSICAL REVIEW LETTERS, 1996, 76 (20) :3814-3817

[2] AC JOSEPHSON EFFECT IN A SINGLE QUANTUM CHANNEL [J].

AVERIN, D ;

BARDAS, A .

PHYSICAL REVIEW LETTERS, 1995, 75 (09) :1831-1834

[3] Shot noise in mesoscopic conductors [J].

Blanter, YM ;

Büttiker, M .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2000, 336 (1-2) :1-166

[4] dc-current transport and ac Josephson effect in quantum junctions at low voltage [J].

Bratus, EN ;

Shumeiko, VS ;

Bezuglyi, EV ;

Wendin, G .

PHYSICAL REVIEW B, 1997, 55 (18) :12666-12677

[5] Hamiltonian approach to the transport properties of superconducting quantum point [J].

Cuevas, JC ;

MartinRodero, A ;

Yeyati, AL .

PHYSICAL REVIEW B, 1996, 54 (10) :7366-7379

[6] Shot noise and coherent multiple charge transfer in superconducting quantum point contacts [J].

Cuevas, JC ;

Martín-Rodero, A ;

Yeyati, AL .

PHYSICAL REVIEW LETTERS, 1999, 82 (20) :4086-4089

[7] Direct observation of a fractional charge [J].

dePicciotto, R ;

Reznikov, M ;

Heiblum, M ;

Umansky, V ;

Bunin, G ;

Mahalu, D .

NATURE, 1997, 389 (6647) :162-164

[8] Observation of Andreev reflection enhanced shot noise [J].

Dieleman, P ;

Bukkems, HG ;

Klapwijk, TM ;

Schicke, M ;

Gundlach, KH .

PHYSICAL REVIEW LETTERS, 1997, 79 (18) :3486-3489

[9] A noise detection scheme with 10 mK noise temperature resolution for semiconductor single electron tunneling devices [J].

Glattli, DC ;

Jacques, P ;

Kumar, A ;

Pari, P ;

Saminadayar, L .

JOURNAL OF APPLIED PHYSICS, 1997, 81 (11) :7350-7356

[10] Supercurrent in atomic point contacts and Andreev states [J].

Goffman, MF ;

Cron, R ;

Yeyati, AL ;

Joyez, P ;

Devoret, MH ;

Esteve, D ;

Urbina, C .

PHYSICAL REVIEW LETTERS, 2000, 85 (01) :170-173

← 1 2 3 →