Esposito Vincent, Rettig Laurenz, Bothschafter Elisabeth M, Deng Yunpei, Dornes Christian, Huber Lucas, Huber Tim, Ingold Gerhard, Inubushi Yuichi, Katayama Tetsuo, Kawaguchi Tomoya, Lemke Henrik, Ogawa Kanade, Owada Shigeki, Radovic Milan, Ramakrishnan Mahesh, Ristic Zoran, Scagnoli Valerio, Tanaka Yoshikazu, Togashi Tadashi, Tono Kensuke, Usov Ivan, Windsor Yoav W, Yabashi Makina, Johnson Steven L, Beaud Paul, Staub Urs
Photon Science Division, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.
Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland.
Struct Dyn. 2018 Dec 6;5(6):064501. doi: 10.1063/1.5063530. eCollection 2018 Nov.
Material properties can be controlled via strain, pressure, chemical composition, or dimensionality. Nickelates are particularly susceptible due to their strong variations of the electronic and magnetic properties on such external stimuli. Here, we analyze the photoinduced dynamics in a single crystalline NdNiO film upon excitation across the electronic gap. Using time-resolved reflectivity and resonant x-ray diffraction, we show that the pump pulse induces an insulator-to-metal transition, accompanied by the melting of the charge order. Finally, we compare our results with similar studies in manganites and show that the same model can be used to describe the dynamics in nickelates, hinting towards a unified description of these photoinduced electronic ordering phase transitions.
材料特性可通过应变、压力、化学成分或维度来控制。镍酸盐因其电子和磁性特性在这类外部刺激下会发生强烈变化，故而特别容易受到影响。在此，我们分析了单晶钕镍氧化物薄膜在跨越电子能隙激发时的光致动力学。通过时间分辨反射率和共振X射线衍射，我们表明泵浦脉冲会引发绝缘体到金属的转变，并伴随着电荷序的熔化。最后，我们将我们的结果与锰酸盐中的类似研究进行比较，结果表明同一模型可用于描述镍酸盐中的动力学，这暗示着对这些光致电子有序相变的统一描述。
