Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
Strongly charged head-to-head domain walls that are purposely engineered along the [110] crystallographic orientation into ferroelectric BaTiO 3single crystals have been proposed as intrinsically nanoscaled two-dimensional electron gases (2DEGs) because of their significant conductivity. Here, we quantify these 2DEG properties through dedicated Hall transport measurements in van der Pauw 4-point geometry, finding the electron mobility to reach around 400 cm 2(V s) -1, while the two-dimensional charge density amounts to 7 × 10 3cm -2. We underline the necessity to take into account the thermal and geometrical misalignment offset voltages by evaluating the Hall resistance under magnetic field sweeps; otherwise, errors of several hundred percent in the derived transport parameters can occur.
Details
Originalsprache | Englisch |
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Seiten (von - bis) | 8717-8722 |
Seitenumfang | 6 |
Fachzeitschrift | ACS Applied Nano Materials |
Jahrgang | 5 |
Ausgabenummer | 7 |
Publikationsstatus | Veröffentlicht - 22 Juli 2022 |
Peer-Review-Status | Ja |
Externe IDs
Scopus | 85135223468 |
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unpaywall | 10.1021/acsanm.2c01919 |
Mendeley | af48d547-1b28-3f56-8362-01832ea45378 |
WOS | 000828231700001 |
ORCID | /0000-0002-2484-4158/work/142257537 |
Schlagworte
DFG-Fachsystematik nach Fachkollegium
Fächergruppen, Lehr- und Forschungsbereiche, Fachgebiete nach Destatis
ASJC Scopus Sachgebiete
Schlagwörter
- Hall effect, barium titanate, domain wall conductivity, ferroelectrics, head-to-head domain walls, two-dimensional electron gas, van der Pauw method