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yexuqing木虫之王 (文学泰斗)
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Chiral altermagnon in MnTe
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Chiral altermagnon in MnTe MnTe中的手性交错磁振子 ▲ 作者：DANIEL JOST, RESHAM BABU REGMI, EDER G. LOMELI, SAMUEL SAHEL-SCHACKIS, MONIKA SCHEUFELE, MARCEL NEUHAUS, ET AL. ▲ 链接： https://www.science.org/doi/10.1126/science.adv3196 ▲ 摘要： 交错磁性被认为是一种介于铁磁性和反铁磁性性质之间的磁性相。此类材料中观察到的动量依赖性自旋劈裂反映了其独特的对称性特征，而这些特征也为手性磁振子的出现创造了条件。 研究组提供了直接实验证据，通过圆二色共振非弹性X射线散射揭示了候选交错磁体碲化锰（MnTe）中存在手性磁振子。研究组将这一模式称为手性交错磁振子，其自旋极化表现出明显的动量依赖性，与MnTe的交错磁g波对称性一致。 该偏振分辨数据证实了一类离散磁激发的存在，展示了交错磁序如何塑造自旋动力学，并为自旋电子学和量子技术的进步奠定了基础。 ▲ Abstract： Altermagnetism has been recognized as a magnetic phase that bridges the properties of ferro- and antiferromagnetism. The momentum-dependent spin splitting observed in these materials reflects their distinctive symmetry characteristics, which also establish the conditions for chiral magnons to emerge. Here we provide direct experimental evidence for a chiral magnon in the altermagnetic candidate manganese telluride (MnTe) revealed by circular-dichroism resonant inelastic x-ray scattering. This mode, which we term chiral altermagnon, exhibits a distinct momentum dependence of its spin polarization consistent with the altermagnetic g-wave symmetry of MnTe. Our polarization-resolved data corroborate the existence of a discrete class of magnetic excitations, demonstrating how altermagnetic order shapes spin dynamics and paving the way for advances in spintronic and quantum technologies. |
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