Polaron Masses in CH3NH3PbX3 Perovskites Determined by Landau Level Spectroscopy in Low Magnetic Fields
Polaron Masses in CH3NH3PbX3 Perovskites Determined by Landau Level Spectroscopy in Low Magnetic Fields
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低磁场下朗道能级光谱法测定 CH3NH3PbX3 钙钛矿中的极化子质量
DOI：
10.1103/physrevlett.126.237401
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发表时间：
2021
影响因子：
8.6
通讯作者：
Kanemitsu Yoshihiko
中科院分区：
文献类型：
--
作者：
Yamada Yasuhiro;Mino Hirofumi;Kawahara Takuya;Oto Kenichi;Suzuura Hidekatsu;Kanemitsu Yoshihiko
我们通过观察弱磁场下的朗道能级和高阶激子来研究卤化铅钙钛矿中的电子-声子耦合，其中回旋能量明显小于纵向光学声子能量.从这些数据中得到的载流子的约化质量和激子结合能明显受到极化子形成的影响。我们分析了场相关的极化子和激子的性质，并表明它们可以定量再现的Fröhlich大极化子模型。
We investigate the electron-phonon coupling inlead halide perovskites through the observation of Landau levels and high-order excitons at weak magnetic fields, where the cyclotron energy is significantly smaller than the longitudinal optical phonon energy. The reduced masses of the carriers and the exciton binding energies obtained from these data are clearly influenced by polaron formation. We analyze the field-dependent polaronic and excitonic properties, and show that they can be quantitatively reproduced by the Fröhlich large polaron model.