Single-pulse terahertz coherent control of spin resonance in the canted antiferromagnet YFeO3, mediated by dielectric anisotropy

被引：75

作者：

Jin, Zuanming ^{[1
,2
]}

Mics, Zoltan ^{[1
]}

Ma, Guohong ^{[2
]}

Cheng, Zhenxiang ^{[3
]}

Bonn, Mischa ^{[1
]}

Turchinovich, Dmitry ^{[1
,4
]}

机构：

[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

[2] Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China

[3] Univ Wollongong, Inst Superconductor & Elect Mat, North Wollongong, NSW 2500, Australia

[4] Tech Univ Denmark, DTU Foton, DK-2800 Lyngby, Denmark

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 09期

基金：

中国国家自然科学基金;

关键词：

ELECTRON-SPIN; SPECTROSCOPY; MANIPULATION; MAGNETIZATION; DYNAMICS; ROTATION; BULK;

D O I：

10.1103/PhysRevB.87.094422

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the coherent control of terahertz (THz) spin waves in a canted antiferromagnet yttrium orthoferrite, YFeO3, associated with a quasiferromagnetic (quasi-FM) spin resonance at a frequency of 0.3 THz, using a single-incident THz pulse. The spin resonance is excited impulsively by the magnetic field component of the THz pulse. The intrinsic dielectric anisotropy of YFeO3 in the THz range allows for coherent control of both the amplitude and the phase of the excited spin wave. The coherent control is based on simultaneous generation of two interfering phase-shifted spin waves whose amplitudes and relative phase, dictated by the dielectric anisotropy of the YFeO3 crystal, can be controlled by varying the polarization of the incident THz pulse with respect to the crystal axes. The spatially anisotropic decay of the THz-excited FM spin resonance in YFeO3, leading to an increasingly linear polarization of the THz oscillation at the spin resonance frequency, suggests a key role of magnon-phonon coupling in spin-wave energy dissipation. DOI: 10.1103/PhysRevB.87.094422

引用

页数：5

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