Magnon-assisted Andreev reflection in a ferromagnet-superconductor junction

被引：9

作者：

McCann, E ^{[1
]}

Fal'ko, VI ^{[1
]}

机构：

[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

来源：

EUROPHYSICS LETTERS | 2001年 / 56卷 / 04期

关键词：

D O I：

10.1209/epl/i2001-00560-3

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A new mechanism for inelastic Andreev reflection at a ferromagnetic metal-superconductor interface is proposed, which consists of the simultaneous injection of a Cooper pair from the superconductor and the emission of a magnon inside the ferromagnet. We nd that this process generates an additional contribution to the subgap non-linear I(V) characteristics, which is asymmetric with respect to the sign of the bias voltage and is related to the density of states of magnons in the ferromagnet.

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页码：583 / 589

页数：7

相关论文

共 40 条

[31] Andreev reflection: A new means to determine the spin polarization of ferromagnetic materials [J].

Soulen, RJ ;

Osofsky, MS ;

Nadgorny, B ;

Ambrose, T ;

Broussard, P ;

Cheng, SF ;

Byers, J ;

Tanaka, CT ;

Nowack, J ;

Moodera, JS ;

Laprade, G ;

Barry, A ;

Coey, MD .

JOURNAL OF APPLIED PHYSICS, 1999, 85 (08) :4589-4591

[32] Measuring the spin polarization of a metal with a superconducting point contact [J].

Soulen, RJ ;

Byers, JM ;

Osofsky, MS ;

Nadgorny, B ;

Ambrose, T ;

Cheng, SF ;

Broussard, PR ;

Tanaka, CT ;

Nowak, J ;

Moodera, JS ;

Barry, A ;

Coey, JMD .

SCIENCE, 1998, 282 (5386) :85-88

[33] SPIN-DEPENDENT TUNNELING INTO FERROMAGNETIC NICKEL [J].

TEDROW, PM ;

MESERVEY, R .

PHYSICAL REVIEW LETTERS, 1971, 26 (04) :192-&

[34] SPIN POLARIZATION OF ELECTRONS TUNNELING FROM FILMS OF FE, CO, NI, AND GD [J].

TEDROW, PM ;

MESERVEY, R .

PHYSICAL REVIEW B, 1973, 7 (01) :318-326

[35]

TKACHOV G, 2001, CONDMAT0106161

[36] MULTIPLE MAGNON EXCITATION IN NIO BY ELECTRON TUNNELING [J].

TSUI, DC ;

DIETZ, RE ;

WALKER, LR .

PHYSICAL REVIEW LETTERS, 1971, 27 (25) :1729-&

[37] Probing ferromagnets with Andreev reflection [J].

Upadhyay, SK ;

Palanisami, A ;

Louie, RN ;

Buhrman, RA .

PHYSICAL REVIEW LETTERS, 1998, 81 (15) :3247-3250

[38] Critical current suppression in a superconductor by injection of spin-polarized carriers from a ferromagnet [J].

Vasko, VA ;

Larkin, VA ;

Kraus, PA ;

Nikolaev, KR ;

Grupp, DE ;

Nordman, CA ;

Goldman, AM .

PHYSICAL REVIEW LETTERS, 1997, 78 (06) :1134-1137

[39] ELECTRON-MAGNON INTERACTION IN FERROMAGNETIC SEMICONDUCTORS [J].

WOOLSEY, RB ;

WHITE, RM .

PHYSICAL REVIEW B, 1970, 1 (11) :4474-&

[40] Quenching of magnetoresistance by hot electrons in magnetic tunnel junctions [J].

Zhang, S ;

Levy, PM ;

Marley, AC ;

Parkin, SSP .

PHYSICAL REVIEW LETTERS, 1997, 79 (19) :3744-3747

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