TY  - JOUR
AU  - Freter, Lars
AU  - Hsu, Hung-Chang
AU  - Sankar, Raman
AU  - Chen, Chun-Wei
AU  - Dunin-Borkowski, Rafal E.
AU  - Ebert, Philipp
AU  - Chiu, Ya-Ping
AU  - Schnedler, Michael
TI  - Interplay of field-induced molecular dipole alignment and compensating surface polarization in low-temperature P − V hysteresis of MAPbBr 3 ( 001 )
JO  - Physical review materials
VL  - 7
IS  - 5
SN  - 2475-9953
CY  - College Park, MD
PB  - APS
M1  - FZJ-2023-02362
SP  - L052401
PY  - 2023
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000993291200002
DO  - DOI:10.1103/PhysRevMaterials.7.L052401
UR  - https://juser.fz-juelich.de/record/1008522
ER  -