标题： 铁弹性交替磁性 显示英文标题

标题： Ferroelastic Altermagnetism

摘要： 协同反铁磁性与其他铁性有序，例如可切换的铁电反铁磁性 [Phys. Rev. Lett. 134, 106801 (2025) 和 ibid. 106802 (2025)]，为实现反铁磁自旋分裂的非易失性切换提供了一条有效途径。在本工作中，通过协同反铁磁性与铁弹性，我们提出了铁弹性反铁磁体的概念，在这种材料中，铁弹性晶体重取向可以通过反铁磁弹性效应驱动反铁磁自旋分裂的多态非易失性切换。使用单层 RuF4 和 CuF2 作为材料候选，我们展示了由铁弹性应变状态驱动的二态和三态反铁磁自旋分裂切换。输运计算表明，多态自旋电导率可以在铁弹性反铁磁体中通过铁弹性编码，从而表明铁弹性反铁磁体在非易失性纳米机械自旋开关方面的潜力。提出的铁弹性反铁磁性概念丰富了多铁性反铁磁性的新兴格局，为基于反铁磁性的应变电子器件应用铺平了道路。 显示英文摘要

摘要： Synergizing altermagnetism and other ferroic orders, such as ferroelectric switchable altermagnetism [Phys. Rev. Lett. 134, 106801 (2025) and ibid. 106802 (2025)], offers an effective route to achieve nonvolatile switching of altermagnetic spin splitting. In this work, by synergizing altermagnetism and ferroelasticity, we propose the concept of ferroelastic altermagnets in which the ferroelastic crystal reorientation can drive multistate nonvolatile switching of the altermagnetic spin splitting via altermagnetoelastic effect. Using monolayers RuF4 and CuF2 as material candidates, we demonstrate 2-state and 3-state altermagnetic spin splitting switching as driven by ferroelastic strain states. Transport calculation shows that multistate spin conductivities can be ferroelastically encoded in an ferroelastic altermagnet, thus suggesting the potential of ferroelastic altermagnetic as nonvolatile nanomechanical spin switches. The proposed concept of ferroelastic altermagnetism enriches the emerging landscape of multiferroic altermagnetism, paving a way towards altermagnetic-based straintronic device applications.