Journal Article

FZJ-2023-02362

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Interplay of field-induced molecular dipole alignment and compensating surface polarization in low-temperature P − V hysteresis of MAPbBr 3 ( 001 )

Freter, L.FZJ* ; Hsu, H.-C. ; Sankar, R. ; Chen, C.-W. ; Dunin-Borkowski, R. E.FZJ* ; Ebert, P.FZJ* ; Chiu, Y.-P. (Corresponding author) ; Schnedler, M. (Corresponding author)FZJ*

2023
APS College Park, MD

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Please use a persistent id in citations: doi:10.1103/PhysRevMaterials.7.L052401  doi:10.34734/FZJ-2023-02362

Abstract: 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.

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Contributing Institute(s):

1. Physik Nanoskaliger Systeme (ER-C-1)

Research Program(s):

1. 5351 - Platform for Correlative, In Situ and Operando Characterization (POF4-535) (POF4-535)
2. DFG project 447951695 - Mikroskopische Untersuchung der Umordnung von Molekül-Dipolen in Organo-Metall-Halogenid-Perowskiten (447951695) (447951695)

Appears in the scientific report 2023

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Web of Science Core Collection

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