论文标题
由微妙失真驱动的相变，没有旋转，电荷和晶格的损坏的LNCU4-ΔP2（LN = EU，SR）
A phase transition driven by subtle distortion without broken symmetry on spin, charge and lattice in Layered LnCu4-δP2(Ln=Eu, Sr)
论文作者
论文摘要
在浓缩物理学中Landau相变理论的情况下，任何热动态相变必须受到与其自旋，电荷，轨道，轨道和晶格相对的破碎对称性。在这里，我们报告了由细微的结构渗透率驱动的，没有任何断裂的对称性，旋转，自旋和晶格。晶格参数（ΔLC/LC）的变化〜0.013％或0.062％，通过热膨胀验证，远小于典型的晶体相变（〜0.5-1％）的变化，但热量的显着异常提供了明确的异常证据。
In the scenario of Landau phase transition theory in condensed matter physics, any thermal dynamic phase transition must be subject to some kind of broken symmetries, that are relative to its spin, charge, orbital and lattice. Here we report a rare phase transition at Tp ~120 K or 140 K in layered materials LnCu4-δP2 (Ln=Eu, Sr) driven by a subtle structural-distortion without any broken symmetry on charge, spin and lattice. The variations of the lattice parameters, (ΔLc/Lc) ~ 0.013% or 0.062%, verified by thermal expansion, is much less than that for a typical crystalline phase transition (~0.5-1%), but the significant anomaly in heat capacity provides clear evidence of its intrinsic nature of thermodynamic transition.
