期刊
NATURE MATERIALS
卷 16, 期 6, 页码 622-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NMAT4878
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资金
- HZB
- ETH Zurich
- SNF [200021_149192]
- Alexander von Humboldt Foundation
- ERC Advanced Grant programme [291151]
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-SC0002334]
- National Science Foundation Materials Research Science and Engineering Centers (MRSEC) programme [DMR-1120296]
- NSF [IMR-0417392]
- Army Research Office of a National Defense Science & Engineering Graduate Fellowship
- National Science Foundation of a National Science Foundation Graduate Research Fellowship
- MINECO-Spain [FIS2013-48668-C2-2-P, SEV-2015-0496]
- Generalitat de Catalunya [2014 SGR301]
- US Department of Energy
- Lawrence Berkeley National Laboratory [DE-AC02-05CH11231]
- Grants-in-Aid for Scientific Research [15H05541] Funding Source: KAKEN
- ICREA Funding Source: Custom
Ferroelectric domain walls hold great promise as functional two-dimensional materials because of their unusual electronic properties. Particularly intriguing are the so-called charged walls where a polarity mismatch causes local, diverging electrostatic potentials requiring charge compensation and hence a change in the electronic structure. These walls can exhibit significantly enhanced conductivity and serve as a circuit path. The development of all-domain-wall devices, however, also requires walls with controllable output to emulate electronic nano-components such as diodes and transistors. Here we demonstrate electric-field control of the electronic transport at ferroelectric domain walls. We reversibly switch from resistive to conductive behaviour at charged walls in semiconducting ErMnO3. We relate the transition to the formation-and eventual activation-of an inversion layer that acts as the channel for the charge transport. The findings provide new insight into the domain-wall physics in ferroelectrics and foreshadow the possibility to design elementary digital devices for all-domain-wall circuitry.
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