期刊
PHYSICAL REVIEW B
卷 87, 期 15, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.155146
关键词
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资金
- CEA Ph.D. Grant CFR
- ANR project Surf-FER [ANR-10-BLAN-1012]
- Minos [ANR-07-BLAN-0312]
- Agence Nationale de la Recherche (ANR) [ANR-10-BLAN-1012, ANR-07-BLAN-0312] Funding Source: Agence Nationale de la Recherche (ANR)
The effective barrier height between an electrode and a ferroelectric (FE) depends on both macroscopic electrical properties and microscopic chemical and electronic structure. The behavior of a prototypical electrode/FE/electrode structure, Pt/BaTiO3/Nb-doped SrTiO3, under in-situ bias voltage is investigated using x-ray photoelectron spectroscopy. The full band alignment is measured and is supported by transport measurements. Barrier heights depend on interface chemistry and on the FE polarization. A differential response of the core levels to applied bias as a function of the polarization state is observed, consistent with Callen charge variations near the interface. DOI: 10.1103/PhysRevB.87.155146
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