Katsufuji Takuro, Kajita Tomomasa, Yano Suguru, Katayama Yumiko, Ueno Kazunori
Department of Physics, Waseda University, Tokyo, 169-8555, Japan.
Kagami Memorial Research Institute for Materials Science and Technology, Waseda University, Tokyo, 169-0051, Japan.
Nat Commun. 2020 May 11;11(1):2324. doi: 10.1038/s41467-020-16004-2.
The dynamics of the first-order phase transitions involving a large displacement of atoms, for example, a liquid-solid transition, is generally dominated by the nucleation of the ordered phase and the growth of the nuclei, where the interfacial energy between the two phases plays an important role. On the other hand, electronic phase transitions seldom exhibit such a nucleation-growth behavior, probably because two-phase coexistence is not dominated by only the interfacial energy in such phase transitions. In the present paper, we report that the dynamics of a phase transition associated with an ordering of d orbitals in a vanadate exhibits a clear nucleation-growth behavior and that the interfacial energy between the orbital-ordered and -disordered phases dominated by the orbital-spin coupling can be experimentally obtained.
涉及原子大位移的一级相变动力学，例如液 - 固转变，通常由有序相的成核和核的生长主导，其中两相之间的界面能起着重要作用。另一方面，电子相变很少表现出这种成核 - 生长行为，可能是因为在这种相变中两相共存并非仅由界面能主导。在本文中，我们报道了与钒酸盐中d轨道有序化相关的相变动力学表现出明显的成核 - 生长行为，并且由轨道 - 自旋耦合主导的轨道有序相和无序相之间的界面能可以通过实验获得。
