Numerical simulation of spin-chiralityswitching in multiferroics via intense electromagnon excitations

Masahito Mochizuki, Naoto Nagaosa

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1 Citation (Scopus)

Abstract

Chirality, i.e., the right- and left-handedness of structure, is one of the key concepts in many fields of science including biology, chemistry and physics, and its manipulation is an issue of vital importance. The electron spins in solids can form chiral configurations. In perovskite manganites RMnO3 (R=Tb, Dy,⋯etc), the Mn-spins form a cycloidal structure, which nduces ferroelectric polarization (P) through the relativistic spin-orbit interaction. This magnetism-induced ferroelectricity (multiferroics) and associated infrared-active spin waves (electromagnons) open a promising route to control the spins by purely electric means in a very short time. In this paper, we show theoretically with an accurate spin Hamiltonian for TbMnO3 that a picosecond optical pulse can switch the spin chirality by intensely exciting the electromagnons with a terahertz frequency.

Original languageEnglish
Article number012082
JournalJournal of Physics: Conference Series
Volume320
DOIs
Publication statusPublished - 2011
Externally publishedYes

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chirality
excitation
simulation
handedness
ferroelectricity
spin-orbit interactions
biology
electron spin
magnons
manipulators
routes
chemistry
physics
polarization
configurations
pulses

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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abstract = "Chirality, i.e., the right- and left-handedness of structure, is one of the key concepts in many fields of science including biology, chemistry and physics, and its manipulation is an issue of vital importance. The electron spins in solids can form chiral configurations. In perovskite manganites RMnO3 (R=Tb, Dy,⋯etc), the Mn-spins form a cycloidal structure, which nduces ferroelectric polarization (P) through the relativistic spin-orbit interaction. This magnetism-induced ferroelectricity (multiferroics) and associated infrared-active spin waves (electromagnons) open a promising route to control the spins by purely electric means in a very short time. In this paper, we show theoretically with an accurate spin Hamiltonian for TbMnO3 that a picosecond optical pulse can switch the spin chirality by intensely exciting the electromagnons with a terahertz frequency.",
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