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arXiv 2004.10421cond-mat.str-el
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动态电荷条纹对反铁磁金属中间接交换和对称性破缺的抑制

Suppression of indirect exchange and symmetry breaking in antiferromagnetic metal with dynamic charge stripes

K. Krasikov, V. Glushkov, S. Demishev, A. Khoroshilov, A. Bogach, V. Voronov, N. Shitsevalova, V. Filipov, S. Gabani, K. Flachbart, K. Siemensmeyer, N. Sluchanko

摘要:

采用精确的角度分辨磁电阻(ARM)测量方法,研究了具有面心立方晶体结构的反铁磁金属HoB 12的基态中电子输运对称性降低和大量磁相出现的原因.通过分析该化合物的极性H-θ-phi磁相图,我们认为非平衡电子密度振荡(动态电荷条纹)是导致<110>该强关联电子系统中Ho 3+离子的间接RKKY交换被抑制的原因.

英文摘要:

Precise angle-resolved magnetoresistance (ARM) measurements are applied to reveal the origin for the lowering of symmetry in electron transport and the emergence of a huge number of magnetic phases in the ground state of antiferromagnetic metal HoB12 with fcc crystal structure. By analyzing of the polar H-theta-phi magnetic phase diagrams of this compound reconstructed from the experimental ARM data we argue that non-equilibrium electron density oscillations (dynamic charge stripes) are responsible for the suppression of the indirect RKKY exchange along <110> directions between the nearest neighboring magnetic moments of Ho3+ ions in this strongly correlated electron system.

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