Real-Space Observation of Emergent Complexity of Phase Evolution in Micrometer-Sized IrTe2 Crystals
Real-Space Observation of Emergent Complexity of Phase Evolution in Micrometer-Sized IrTe2 Crystals
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微米级 IrTe2 晶体中相演化的复杂性的实空间观测
DOI：
10.1103/physrevlett.127.145701
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发表时间：
2021
影响因子：
8.6
通讯作者：
Kagawa F.
中科院分区：
文献类型：
--
作者：
Oike H.;Takeda K.;Kamitani M.;Tokura Y.;Kagawa F.
我们报告复杂的行为在过渡金属dichalcogenidethin薄片的相演化，捕获与实际空间的观察，使用扫描拉曼显微镜。相变的进展，通过少量的域，这是不可能的统计模型，假设一个宏观数量的成核事件的增长。因此，在薄片中的相演变的程度是相当可变的所选择的试样和重复的测量序列，代表出现的复杂性相演变。在体积试样中，复杂的相演化导致超导相的出现共存，该超导相最初需要化学掺杂才能变得稳定。这些研究结果表明，相演变的复杂性相当大地影响了一个小尺寸的标本的物理性质。
We report complex behaviors in the phase evolution of transition-metal dichalcogenidethin flakes, captured with real-space observations using scanning Raman microscopy. The phase transition progresses via growth of a small number of domains, which is unlikely in statistical models that assume a macroscopic number of nucleation events. Consequently, the degree of phase evolution in the thin flakes is quite variable for the selected specimen and for a repeated measurement sequence, representing the emergence of complexity in the phase evolution. In the-volume specimen, the complex phase evolution results in the emergent coexistence of a superconducting phase that originally requires chemical doping to become thermodynamically stable. These findings indicate that the complexity involved in phase evolution considerably affects the physical properties of a small-sized specimen.