We have studied the temperature-dependent electronic structure of the light rare-earth antimonide LaSb₂ by combining angle-resolved photoemission (ARPES) measurements and density functional theory (DFT) calculations. ARPES measurements show the appearance of band replicas in the low-temperature Fermi surface with q = 0.25 ± 0.02 A⁻¹ and a band folding of the same periodicity with a considerable spectral weight in the folded band. From our calculations we elucidate that the folded band exhibiting the new periodicity is associated with the La-Sb layer. We propose that an in-plane distortion, probably affecting the whole unit cell, is the structural modification related to the electronic changes. All these results converge to support that a charge density wave is stabilized in LaSb₂ at low temperature.

我们通过结合角度分辨光电发射 (ARPES) 测量和密度泛函理论 (DFT) 计算，研究了轻稀土锑化物 LaSb _{2的温度相关电子结构。}ARPES 测量显示在低温费米表面中出现带复制品，q = 0.25 ± 0.02 A ^-1和具有相同周期性的带折叠，折叠带中有相当大的光谱权重。从我们的计算中，我们阐明了表现出新周期性的折叠带与 La-Sb 层有关。我们提出，可能影响整个晶胞的面内变形是与电子变化相关的结构修改。所有这些结果都收敛于支持电荷密度波在 LaSb 中是稳定的₂低温。