Nanoscale Conductive Sheets in Ferroelectric BaTiO3: Large Hall Electron Mobilities at Head-to-Head Domain Walls
Source abstract
Abstract
Strongly charged head-to-head domain walls that are purposely engineered along the [110] crystallographic orientation into ferroelectric BaTiO3 single 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 cm2 (V s)−1, while the two-dimensional charge density amounts to 7 × 103 cm–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.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electronic and Structural Properties of Oxides · Semiconductor materials and devices · Ferroelectric and Piezoelectric Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Applied Physics, Technische Universität (TU) Dresden, Nöthnitzer Strasse 61, 01187 Dresden, Germany
Institute of Physics of the Czech Academy of Sciences, 18221 Prague, Czech Republic
ct.qmat: Dresden-Würzburg Cluster of Excellence─EXC 2147, Technische Universität (TU) Dresden, 01062 Dresden, Germany
Funding
Agence Nationale de la Recherche · Ministerstvo ?kolstv?, Ml?de?e a Telov?chovy · Deutsche Forschungsgemeinschaft · Grantov? Agentura Cesk? Republiky · European Structural and Investment Funds
References (30)
Show source-provided references
1. 10.1103/RevModPhys.84.11910.1103/RevModPhys.84.119 ↗
2. Meier D. · J. Phys.: Condens. Matter · 2015 · 27 · 463003
3. Sluka, T.; Bednyakov, P.; Yudin, P.; Crassous, A.; Tagantsev, A. In Topological Structures in Ferroic Materials: Domain Walls, Vortices and Skyrmions; Seidel, J., Eds. Springer International Publishing: Cham, Switzerland, 2016; pp 103–138.10.1007/978-3-319-25301-5_5 ↗
4. 10.1038/s41524-018-0121-810.1038/s41524-018-0121-8 ↗
5. 10.3390/ma1218292710.3390/ma12182927 ↗
6. 10.1038/s42254-020-0235-z10.1038/s42254-020-0235-z ↗
7. 10.1038/s41578-021-00375-z10.1038/s41578-021-00375-z ↗
8. 10.1002/adfm.20211026310.1002/adfm.202110263 ↗
9. 10.1038/ncomms1376410.1038/ncomms13764 ↗
10. 10.1021/acs.nanolett.8b0274210.1021/acs.nanolett.8b02742 ↗
11. 10.1103/PhysRevApplied.17.04401110.1103/PhysRevApplied.17.044011 ↗
12. 10.1142/9789814503464_001710.1142/9789814503464_0017 ↗
13. 10.1038/ncomms283910.1038/ncomms2839 ↗
14. 10.1063/1.499047010.1063/1.4990470 ↗
15. 10.1002/adma.20160287410.1002/adma.201602874 ↗
16. 10.1021/acsanm.9b0124010.1021/acsanm.9b01240 ↗
17. 10.1038/srep1581910.1038/srep15819 ↗
18. 10.1038/s41598-017-09703-210.1038/s41598-017-09703-2 ↗
19. 10.1103/PhysRevApplied.10.03400210.1103/PhysRevApplied.10.034002 ↗
20. Schroder D. K. · 2006
21. Lundstrom M. · 2009
22. 10.1103/PhysRev.157.35810.1103/PhysRev.157.358 ↗
23. 10.1016/S0955-2219(03)00504-110.1016/S0955-2219(03)00504-1 ↗
24. 10.3390/cryst808031610.3390/cryst8080316 ↗
25. Sluka T. · Nat. Commun. · 2012 · 3 · 74810.1038/ncomms1751 ↗
26. 10.1002/adfm.20160348910.1002/adfm.201603489 ↗
27. 10.1103/PhysRevB.98.10010410.1103/PhysRevB.98.100104 ↗
28. 10.1103/RevModPhys.54.43710.1103/RevModPhys.54.437 ↗
29. 10.1063/1.370246410.1063/1.3702464 ↗
30. 10.1038/srep1146710.1038/srep11467 ↗