Kagome晶格金属间化合物ScV6Sn6中的电荷密度波,Physical Review Letters

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Kagome晶格金属间化合物ScV6Sn6中的电荷密度波
Physical Review Letters ( IF 8.1 ) Pub Date : 2022-11-18 , DOI: 10.1103/physrevlett.129.216402
Hasitha W Suriya Arachchige ₁ , William R Meier ₂ , Madalynn Marshall ₃ , Takahiro Matsuoka ₂ , Rui Xue ₁ , Michael A McGuire ₄ , Raphael P Hermann ₄ , Huibo Cao ₃ , David Mandrus _{1,

2,

4}

Affiliation

承载 kagome 晶格的材料引起了人们对由几何挫折产生的各种磁性和电子状态的兴趣。在里面

一个 V_{3个} 锑_{5个}

化合物（

一个 = 钾

, Rb, Cs), 堆叠的钒 kagome 层产生不寻常的电荷密度波 (CDW) 和超导性。在这里，我们报告了单晶生长和表征

{SCV}_{6个} 锡_{6个}

, 一个六边形

{铁氟合金}_{6个} 葛_{6个}

共享此结构基序的类型化合物。我们确定了 92 K 处的一阶相变。单晶 X 射线和中子衍射揭示了低于该温度的原子晶格的电荷密度波调制。这是一个明显不同于观察到的结构模式

一个 V_{3个} 锑_{5个}

化合物，但在可果美金属中已经预料到这两种模式。多样化的

{铁氟合金}_{6个} 葛_{6个}

家庭提供更多调整机会

{SCV}_{6个} 锡_{6个}

探索kagome晶格材料中的密度波序。

"点击查看英文标题和摘要"

Charge Density Wave in Kagome Lattice IntermetallicScV6Sn6

Materials hosting kagome lattices have drawn interest for the diverse magnetic and electronic states generated by geometric frustration. In the

A V_{3} {Sb}_{5}

compounds (

A = K

, Rb, Cs), stacked vanadium kagome layers give rise to unusual charge density waves (CDW) and superconductivity. Here we report single-crystal growth and characterization of

{ScV}_{6} {Sn}_{6}

, a hexagonal

{HfFe}_{6} {Ge}_{6}

-type compound that shares this structural motif. We identify a first-order phase transition at 92 K. Single crystal x-ray and neutron diffraction reveal a charge density wave modulation of the atomic lattice below this temperature. This is a distinctly different structural mode than that observed in the