The tetragonal phase of CH$_{3}$NH$_{3}$PbI$_{3}$ is strongly anharmonic

15 May 2020 Sharma Rituraj Dai Zhenbang Gao Lingyuan Brenner Thomas M. Yadgarov Lena Zhang Jiahao Rakita Yevgeny Korobko Roman Rappe Andrew M. Yaffe Omer

Halide perovskite (HP) semiconductors exhibit unique strong coupling between the electronic and structural dynamics. The high-temperature cubic phase of HPs is known to be entropically stabilized, with imaginary frequencies in the calculated phonon dispersion relation... (read more)

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