%0 Journal Article
%A Freter, Lars
%A Hsu, Hung-Chang
%A Sankar, Raman
%A Chen, Chun-Wei
%A Dunin-Borkowski, Rafal E.
%A Ebert, Philipp
%A Chiu, Ya-Ping
%A Schnedler, Michael
%T Interplay of field-induced molecular dipole alignment and compensating surface polarization in low-temperature P − V hysteresis of MAPbBr 3 ( 001 )
%J Physical review materials
%V 7
%N 5
%@ 2475-9953
%C College Park, MD
%I APS
%M FZJ-2023-02362
%P L052401
%D 2023
%X We demonstrate the presence of a hysteresis in tunneling spectra acquired at 4.3 K on cleaved MA-Br terminated (001) surfaces of MAPbBr3 single crystals. Simulations of the tunneling spectra reveal an underlying polarization-voltage (P-V) hysteresis, which is caused by an interplay of subsurface field-induced rotation and alignment of the MA molecules, stabilized by dipole-dipole interactions, and an ion-lattice relaxation. The resulting subsurface polarization is counteracted by a compensating surface polarization, detectable by surface-sensitive tunneling spectroscopy.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000993291200002
%R 10.1103/PhysRevMaterials.7.L052401
%U https://juser.fz-juelich.de/record/1008522