量子临界点的超快磁序光学感应。

IF 2.3 4区 物理与天体物理 Q3 PHYSICS, CONDENSED MATTER
Benedikt Fauseweh, Jian-Xin Zhu
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引用次数: 0

摘要

时间分辨超快光谱学已成为一种很有前途的工具,可用于动态诱导和操纵物质的非三态电子失衡状态。在这里,我们从理论上研究了接近量子临界的 Kondo 晶格系统中的光脉冲驱动动力学。基于随时间变化的辅助费米子均场计算,我们发现光可以去杂化局部近藤屏蔽,并从先前的顺磁态中诱导出振荡磁序。根据激光脉冲场的振幅和频率,近藤单子可以完全去杂,从而诱发改变费米面拓扑结构的动态利夫希茨转变。这些现象可以在谐波发生和时间分辨 ARPES 光谱中识别出来。我们的研究结果为研究重费米子系统中的非平衡态提供了新的视角。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ultrafast optical induction of magnetic order at a quantum critical point.

Time-resolved ultrafast spectroscopy has emerged as a promising tool to dynamically induce and manipulate non-trivial electronic states of matter out-of-equilibrium. Here we theoretically investigate light pulse driven dynamics in a Kondo lattice system close to quantum criticality. Based on a time-dependent auxiliary fermion mean-field calculation we show that light can dehybridize the local Kondo screening and induce oscillating magnetic order out of a previously paramagnetic state. Depending on the laser pulse field amplitude and frequency the Kondo singlet can be completely deconfined, inducing a dynamic Lifshitz transition that changes the Fermi surface topology. These phenomena can be identified in harmonic generation and time-resolved angle-resolved photoemission spectroscopy spectra. Our results shed new light on non-equilibrium states in heavy fermion systems.

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来源期刊
Journal of Physics: Condensed Matter
Journal of Physics: Condensed Matter 物理-物理:凝聚态物理
CiteScore
5.30
自引率
7.40%
发文量
1288
审稿时长
2.1 months
期刊介绍: Journal of Physics: Condensed Matter covers the whole of condensed matter physics including soft condensed matter and nanostructures. Papers may report experimental, theoretical and simulation studies. Note that papers must contain fundamental condensed matter science: papers reporting methods of materials preparation or properties of materials without novel condensed matter content will not be accepted.
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