Cumulative polarization in conductive interfacial ferroelectrics
- Journal: nature
- Published Year: 2022
- Authors: Swarup Deb, Wei Cao, Noam Raab, Kenji Watanabe, Takashi Taniguchi, Moshe Goldstein, Leeor Kronik, Michael Urbakh, Oded Hod & Moshe Ben Shalom
- Application: nanoelectronics, 2D materials, quantum electronics
Summary
This study investigates ferroelectricity in multilayer WSe₂ and MoS₂ stacks, revealing evenly spaced interfacial potential steps indicative of confined electric fields—enabling multi-state "ladder-ferroelectrics." Unlike previous work limited to binary states, polarization here persists under high charge carrier densities (~10¹³ cm⁻²). Density functional theory shows how charge redistributes across layers, elucidating a doping-induced depolarization mechanism. Findings advance ferroelectric control in 2D materials for novel nanoelectronic applications.
The surface potential measurements were conducted via KPFM on Park NX10 AFM.
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