Neutron scattering study of the kagome metal Sc3Mn3Al7Si5
Neutron scattering study of the kagome metal Sc3Mn3Al7Si5
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DOI：
10.1103/physrevb.104.134305
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发表时间：
2021-04
影响因子：
3.7
通讯作者：
X. Y. Li;D. Reig-i-Plessis;P. Liu;S. Wu;B. T. Wang;A. Hallas;M. Stone;C. Broholm;M. Aronson
中科院分区：
文献类型：
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作者：
X. Y. Li;D. Reig-i-Plessis;P. Liu;S. Wu;B. T. Wang;A. Hallas;M. Stone;C. Broholm;M. Aronson
Sc3Mn3Al7Si5是一种罕见的相关金属，其中Mn矩形成kagome晶格。在最低温度下缺乏磁有序表明，磁相互作用的几何挫折可能导致强烈的磁波动。我们对Sc3Mn3Al7Si5进行了非弹性中子散射测量，发现在~20 ~ 50 meV的能量范围内声子散射占主导地位。这些结果与从头计算声子色散和态密度的结果很好地吻合，并重现了测量的比热。在能量小于~10兆电子伏特时检测到微弱的磁信号，仅在最低温度下存在。磁信号是宽的和准弹性的，正如金属顺磁体所期望的那样。信件应寄给谁。xiyang.li@ubc.ca
Sc3Mn3Al7Si5 is a rare example of a correlated metal in which the Mn moments form a kagome lattice. The absence of magnetic ordering to the lowest temperatures suggests that geometrical frustration of magnetic interactions may lead to strong magnetic fluctuations. We have performed inelastic neutron scattering measurements on Sc3Mn3Al7Si5, finding that phonon scattering dominates for energies from ~20 50 meV. These results are in good agreement with ab initio calculations of the phonon dispersions and densities of states, and as well reproduce the measured specific heat. A weak magnetic signal was detected at energies less than ~10 meV, present only at the lowest temperatures. The magnetic signal is broad and quasielastic, as expected for metallic paramagnets. *To whom correspondence should be addressed. xiyang.li@ubc.ca