AI 中文总结
该研究揭示高自旋变磁体中压磁效应的量子起源，发现整数与半整数自旋体系压磁响应的差异，确立压磁效应可探测高自旋量子动力学，为量子磁弹性响应提供新体系。
AI 中文摘要
我们采用味波方法研究具有易平面单离子各向异性的高自旋变磁体中的压磁效应，证明高自旋集体模式的量子涨落是压磁响应的微观起源。对于整数自旋，相关分支软化并在趋近大D相变时演化为类希格斯振幅模式，使激发具有可观的偶极分量，显著增强压磁效应；相比之下，半整数系统中，随各向异性增大，高自旋分支逐渐与低能偶极区分离，抑制其对响应的贡献。这种整数-半整数对比将宏观压磁效应与多极激发的低能演化直接关联，研究确立压磁效应可作为探测高自旋量子动力学的工具，并确定高自旋变磁体是实现量子磁弹性响应的有前景体系。
英文摘要
We investigate piezomagnetism in higher-spin altermagnets with easy-plane single-ion anisotropy using a flavor-wave approach. We show that quantum fluctuations of higher-spin collective modes provide a microscopic origin of the piezomagnetic response. For integer spins, the relevant branch softens and evolves into a Higgs-like amplitude mode on approaching the large-$D$ transition, endowing the excitation with a sizable dipolar component and producing a pronounced enhancement of piezomagnetism. By contrast, in half-integer systems the higher-spin branches are progressively separated from the low-energy dipolar sector as the anisotropy increases, which suppresses their contribution to the response. This integer-half-integer contrast directly links macroscopic piezomagnetism to the low-energy fate of multipolar excitations. Our results establish piezomagnetism as a probe of higher-spin quantum dynamics and identify higher-spin altermagnets as a promising setting for quantum magnetoelastic responses.
Comments6+2 pages, 4+1 figures, 1 table
