High-temperature short-range order in Mn3RhSi

High-temperature short-range order in Mn3RhSi
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Mn3RhSi 中的高温短程有序

DOI:
10.1038/s43246-020-0042-1
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发表时间:
2020
影响因子:
7.8
通讯作者:
Sh
Sh
中科院分区:
--
文献类型:
--
作者:
Hiroki Yamauchi;Dita Puspita Sari;Isao Watanabe;Yukio Yasui;Lieh-Jeng Chang;Keietsu Kondo;Takashi U. Ito;Motoyuki Ishikado;Masato Hagihara;Matthias D. Frontzek;Songxue Chi;Jaime A. Fernandez-Baca;James S. Lord;Adam Berlie;Atsuhiro Kotani;Sh

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传统的相变是根据朗道-金兹伯格-威尔逊理论的序参量来理解的。然而,非常规的磁序已被观察到在清洁系统,如锰硅。在高温超导体和重费米子化合物中,已经观察到金属相中传导电子的非常规磁序。然而,这些非常规的磁序仅限于相对较低的温度作为量子相变。在这里观察到的高温磁短程有序的非常规磁订单在温度高达720 K的非中心对称金属间反铁磁体Mn 3 RhSi与有序晶格。磁性Mn离子形成角共享三角形的超角形网络,其中自旋在几何上受到阻碍。自旋网络相当于自旋液体和非费米液体材料β-Mn的自旋网络。我们的观察表明,在高温下存在一个具有磁性短程有序的金属相。
Conventional phase transitions are well understood in terms of the order parameter, based on the Landau–Ginzburg–Wilson theory. However, unconventional magnetic orders have been observed in clean systems such as MnSi. The unconventional magnetic orders of conduction electrons in the metallic phase has been observed for high-temperature superconductors and heavy fermion compounds. However, these unconventional magnetic orders have been limited to relatively low temperatures as quantum phase transitions. Here high-temperature magnetic short-range order is observed as one of the unconventional magnetic orders at temperatures up to 720 K in a noncentrosymmetric intermetallic antiferromagnet Mn 3 RhSi with a well-ordered lattice. The magnetic Mn ions form a hyperkagome network of corner-sharing triangles, where the spins are geometrically frustrated. The spin network is equivalent to that of a spin liquid and non-Fermi-liquid material, β-Mn. Our observation indicates that a metallic phase with magnetic short-range order exists at high temperatures.
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