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arXiv 2409.13632cond-mat.mtrl-scicond-mat.mes-hall
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非磁性固体中普遍存在的对称性保护的自旋织构

Universal symmetry-protected persistent spin textures in nonmagnetic solids

Berkay Kilic, Sergio Alvarruiz, Evgenii Barts, Bertjan van Dijk, Paolo Barone, Jagoda Slawinska

AI总结:

本文通过分析所有230个空间群,证明了非磁性无中心对称固体中普遍存在对称性保护的持久自旋织构,并利用群论确定其布里渊区位置和自旋方向,为自旋电子学材料发现开辟新路。

摘要:

门捷列夫周期表的意义不仅限于元素分类;它在于其发现新元素和新性质的显著预测能力,揭示了自然的潜在对称性模式,这些模式直到量子力学出现才被完全理解。基本材料性质,如电子输运和磁性,也受晶体对称性支配。特别是,自旋输运依赖于电子态的自旋极化,而最近发现的电子自旋极化与动量无关的材料——这一性质被称为持久自旋织构(PST)——有望延长自旋寿命并实现高效的自旋积累。在本文中,我们建立了体晶体中对称性保护的PST存在的一般条件。通过系统分析所有230个晶体空间群,类似于周期表中的元素,我们证明了PST普遍存在于所有缺乏反演对称性的非磁性固体中。利用群论,我们识别了布里渊区内承载PST的区域,并确定了相应的自旋极化方向。我们的发现,得到了代表性材料的第一性原理计算的支持,为基于PST发现稳健的自旋电子学材料开辟了道路。

英文摘要:

The significance of Mendeleev's periodic table extends beyond the classification of elements; it lies in its remarkable predictive power for discovering new elements and properties, revealing the underlying symmetrical patterns of nature that were only fully understood with the advent of quantum mechanics. Fundamental material properties, such as electron transport and magnetism, are also governed by crystal symmetry. In particular, spin transport depends on the spin polarization of electronic states, and recently discovered materials where the electron spin polarization is independent of momentum - a property known as a persistent spin texture (PST) - promise extended spin lifetime and efficient spin accumulation. In this paper, we establish the general conditions for the existence of symmetry-protected PST in bulk crystals. By systematically analyzing all 230 crystallographic space groups, similar to elements in the periodic table, we demonstrate that PST is universally present in all nonmagnetic solids lacking inversion symmetry. Using group theory, we identify the regions within the Brillouin zone that host PST and determine the corresponding directions of spin polarization. Our findings, supported by first-principles calculations of representative materials, open the route for discovering robust spintronic materials based on PST.

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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