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arXiv 1102.3762cond-mat.str-elcond-mat.mtrl-sci
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强电磁子激发下多铁性材料自旋手征转换的数值模拟

Numerical Simulation of Spin-Chirality Switching in Multiferroics via Intense Electromagnon Excitations

Masahito Mochizuki, Naoto Nagaosa

摘要:

手性,即,结构的左右手性是包括生物学、化学和物理学在内的许多科学领域中的关键概念之一,并且其操纵是至关重要的问题。固体中的电子自旋可以形成手性构型。在钙钛矿锰氧化物RMnO 3(R=Tb,Dy,.等),Mn自旋形成摆线结构,通过相对论自旋轨道相互作用诱导铁电极化(P)。这种磁感应铁电性(多铁性)和相关的红外活性自旋波(电磁振子)开辟了一条有希望的途径,可以在很短的时间内通过纯电手段控制自旋。在本文中,我们从理论上与一个精确的自旋哈密顿TbMnO 3的皮秒光脉冲可以切换的自旋手征强烈激发的太赫兹频率的电磁振子。

英文摘要:

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 induces 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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