Theory of spin current in chiral helimagnets / Bostrem I. G.,Kishine Jun-ichiro,Ovchinnikov A. S. // PHYSICAL REVIEW B. - 2008. - V. 78, l. 6.

ISSN/EISSN:

1098-0121 / нет данных

Type:

Article

Abstract:

We give detailed description of the transport spin current in the chiral helimagnet. Under the static magnetic field applied perpendicular to the helical axis, the magnetic kink crystal (chiral soliton lattice) is formed. Once the kink crystal begins to move under the Galilean boost, the spin-density accumulation occurs inside each kink and there emerges periodic arrays of the induced magnetic dipoles carrying the transport spin current. The coherent motion of the kink crystal dynamically generates the spontaneous demagnetization field. To describe the kink crystal motion, we took account of not only the tangential phi fluctuations but the longitudinal theta fluctuations around the helimagnetic configuration. Based on the collective coordinate method and the Dirac canonical formulation for the singular Lagrangian system, we derived the closed formulas for the mass, spin current, and induced magnetic-dipole moment accompanied with the kink crystal motion. To materialize the theoretical model presented here, symmetry-adapted material synthesis would be required, where the interplay of crystallographic and magnetic chirality plays a key role there.

Author keywords:

CHARGE-DENSITY-WAVE; HELICOIDAL STRUCTURES; ANTIFERROMAGNETS; MULTILAYERS; TRANSITION; EQUATION; MAGNETS; MODELS

DOI:

10.1103/PhysRevB.78.064425

Web of Science ID:

ISI:000259264900074

Соавторы в МНС:

Другие поля

Поле	Значение
Month	AUG
Publisher	AMER PHYSICAL SOC
Address	ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Language	English
Article-Number	064425
Keywords-Plus	CHARGE-DENSITY-WAVE; HELICOIDAL STRUCTURES; ANTIFERROMAGNETS; MULTILAYERS; TRANSITION; EQUATION; MAGNETS; MODELS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
ResearcherID-Numbers	Ovchinnikov, Alexander/B-9906-2009 Kishine, Jun-ichiro/C-1743-2015
ORCID-Numbers	Kishine, Jun-ichiro/0000-0001-6162-7067 Ovchinnikov, Alexander/0000-0002-1173-9260
Number-of-Cited-References	56
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	14
Journal-ISO	Phys. Rev. B
Doc-Delivery-Number	349EU