极化(电化学)
热电性
激发态
激发
旋转交叉
材料科学
Crystal(编程语言)
自旋极化
凝聚态物理
光电子学
光学
化学
电介质
原子物理学
物理
铁电性
电子
物理化学
量子力学
计算机科学
程序设计语言
作者
Shengqun Su,Shu‐Qi Wu,Yu‐Bo Huang,Wen‐Huang Xu,Kaige Gao,Atsushi Okazawa,Hajime Okajima,Akira Sakamoto,Shinji Kanegawa,Osamu Sato
标识
DOI:10.1002/anie.202208771
摘要
Using light as a local heat source to induce a temporary pyroelectric current is widely recognized as an effective way to control the polarization of crystalline materials. In contrast, harnessing light directly to modulate the polarization of a crystal via excitation of the electronic bands remains less explored. In this study, we report an FeII spin crossover crystal that exhibits photoinduced macroscopic polarization change upon excitation by green light. When the excited crystal relaxes to the ground state, the corresponding pyroelectric current can be detected. An analysis of the structures, magnetic properties and the Mössbauer and infrared spectra of the complex, supported by calculations, revealed that the polarization change is dictated by the directional relative movement of ions during the spin transition process. The spin transition and polarization change occur simultaneously in response to light stimulus, which demonstrates the enormous potential of polar spin crossover systems in the field of optoelectronic materials.
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