Controlling coherent and incoherent spin dynamics by steering the photoinduced energy flow

被引：53

作者：

Bossini, D. ^{[1
]}

Kalashnikova, A. M. ^{[2
]}

Pisarev, R. V. ^{[2
]}

Rasing, Th. ^{[1
]}

Kimel, A. V. ^{[1
]}

机构：

[1] Radboud Univ Nijmegen, Inst Mol & Mat, NL-6525 ED Nijmegen, Netherlands

[2] Russian Acad Sci, AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

来源：

PHYSICAL REVIEW B | 2014年 / 89卷 / 06期

基金：

俄罗斯基础研究基金会; 欧洲研究理事会;

关键词：

KNIF3;

D O I：

10.1103/PhysRevB.89.060405

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a femtosecond spectroscopic magneto-optical investigation of the coherent and incoherent spin dynamics in the antiferromagnetic dielectric KNiF3. The pathways of the photoinduced energy flow to spins were controlled by tuning the pump photon energy. In particular, we demonstrate that laser pulses, with photon energy tuned to a nearly-zero-absorption region, excite the spin system without any signatures of heating of electrons or phonons. In this regime the ultrafast excitation of coherent spin waves is followed by a gradual increase of the spin temperature solely due to decoherence of the laser-generated magnons, as revealed by our simultaneous measurement of both the transversal and the longitudinal component of the spin dynamics.

引用

页数：5

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