Tunable φ Josephson junction ratchet

被引：12

作者：

Menditto, R. ^{[1
,2
]}

Sickinger, H. ^{[1
,2
]}

Weides, M. ^{[3
]}

Kohlstedt, H. ^{[4
]}

Koelle, D. ^{[1
,2
]}

Kleiner, R. ^{[1
,2
]}

Goldobin, E. ^{[1
,2
]}

机构：

[1] Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany

[2] Univ Tubingen, Ctr Quantum Sci LISA, Morgenstelle 14, D-72076 Tubingen, Germany

[3] Karlsruher Inst Technol, Inst Phys, D-76128 Karlsruhe, Germany

[4] Univ Kiel, Tech Fak, Nanoelekt, D-24143 Kiel, Germany

来源：

PHYSICAL REVIEW E | 2016年 / 94卷 / 04期

关键词：

MAGNETIC-FLUX QUANTA; BROWNIAN MOTORS; CHAOTIC TRANSPORT; THERMAL RATCHETS; MOTION; BASICS; ARRAY;

D O I：

10.1103/PhysRevE.94.042202

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We demonstrate experimentally the operation of a deterministic Josephson ratchet with tunable asymmetry. The ratchet is based on a phi Josephson junction with a ferromagnetic barrier operating in the underdamped regime. The system is probed also under the action of an additional dc current, which acts as a counterforce trying to stop the ratchet. Under these conditions the ratchet works against the counterforce, thus producing a nonzero output power. Finally, we estimate the efficiency of the phi Josephson junction ratchet.

引用

页数：5

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