论文标题
Kagome超导体$ {\ MATHRM {CSV}} _ 3 {\ MATHRM {SB}} _ 5 $的多堆叠电荷密度波的共存
Coexistence of Multiple Stacking Charge Density Waves in Kagome Superconductor ${\mathrm{CsV}}_3{\mathrm{Sb}}_5$
论文作者
论文摘要
最近发现的Kagome家族$ {\ MATHRM {AV}} _ 3 {\ MATHRM {sb}} _ 5 $（A = K，RB，CS）表现出丰富的物理现象，包括非主导拓扑结构，包括巨大的震撼霍尔效应，巨大的隔离厅效应，电荷密度效应，电荷密度（CDW）和超级胶粘剂。值得注意的是，$ {\ mathrm {av}} _ 3 {\ mathrm {sb}} _ 5 $的CDW证明了其超导性和拓扑结合，但其性质仍然难以捉摸。在这里，我们将X射线散射实验和密度功能理论计算结合在一起，以$ {\ Mathrm {csv}} _ 3 {\ Mathrm {sb}} _ 5 $调查CDW，并证明2 $ \ times $ 2 $ 2 $ \ \ \ 2 $ \ \ \ 2 $ 2 $ 2 $ 2 $ 2 $ \ 4 cd per per per的共存性2 $ \ times $ \ times $ \ times $ \ times $ \ times $ \ times $ 2 $ \通过跟踪CDW强度的温度演化，这些CDW相之间的竞争可以揭示出来，这在变暖和冷却测量过程中也表现出不同的过渡温度。我们还标识了$ {\ mathrm {csv}} _ 3 {\ mathrm {sb}} _ 5 $的元稳定状态。我们的研究表明，在$ {\ mathrm {csv}}} _ 3 {\ mathrm {sb}} _ 5 $中竞争CDW堆叠的共存，为理解该系统的新颖属性提供了新的见解。
The recently discovered Kagome family ${\mathrm{AV}}_3{\mathrm{Sb}}_5$ (A = K, Rb, Cs) exhibits rich physical phenomena, including non-trivial topological electronic structure, giant anomalous Hall effect, charge density waves (CDW) and superconductivity. Notably, CDW in ${\mathrm{AV}}_3{\mathrm{Sb}}_5$ is evidenced to intertwine with its superconductivity and topology, but its nature remains elusive. Here, we combine x-ray scattering experiments and density-functional theory calculations to investigate the CDWs in ${\mathrm{CsV}}_3{\mathrm{Sb}}_5$ and demonstrate the coexistence of 2 $\times$ 2 $\times$ 2 and 2 $\times$ 2 $\times$ 4 CDW stacking phases. Competition between these CDW phases is revealed by tracking the temperature evolution of CDW intensities, which also manifests in different transition temperatures during warming- and cooling measurements. We also identify a meta-stable quenched state of ${\mathrm{CsV}}_3{\mathrm{Sb}}_5$ after fast-cooling process. Our study demonstrates the coexistence of competing CDW stacking in ${\mathrm{CsV}}_3{\mathrm{Sb}}_5$, offering new insights in understanding the novel properties of this system.
