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Title: Field enhancement of electronic conductance at ferroelectric domain walls

Journal Article · · Nature Communications
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [2];  [3]; ORCiD logo [4];  [5]; ORCiD logo [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science, Inst. for Functional Imaging of Materials
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science, Inst. for Functional Imaging of Materials; Xi'an Jiaotong Univ. (China). Multi-disciplinary Materials Research Center, Frontier Inst. of Science and Technology
  3. National Cheng Kung Univ., Tainan City (Taiwan). Dept. of Physics
  4. National Chiao Tung Univ., Hsinchu (Taiwan). Dept. of Materials Science and Engineering; Academia Sinica, Taipei (Taiwan). Inst. of Physics
  5. Pennsylvania State Univ., University Park, PA (United States). Dept. of Materials Science and Engineering

Ferroelectric domain walls have continued to attract widespread attention due to both the novelty of the phenomena observed and the ability to reliably pattern them in nanoscale dimensions. But, the conductivity mechanisms remain in debate, particularly around nominally uncharged walls. Here, we posit a conduction mechanism relying on field-modification effect from polarization re-orientation and the structure of the reverse-domain nucleus. Through conductive atomic force microscopy measurements on an ultra-thin (001) BiFeO3 thin film, in combination with phase-field simulations, we show that the field-induced twisted domain nucleus formed at domain walls results in local-field enhancement around the region of the atomic force microscope tip. In conjunction with slight barrier lowering, these two effects are sufficient to explain the observed emission current distribution. Our results suggest that different electronic properties at domain walls are not necessary to observe localized enhancement in domain wall currents.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; FG02-07ER46417
OSTI ID:
1414693
Journal Information:
Nature Communications, Vol. 8, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

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Cited By (6)

Characterization of domain distributions by second harmonic generation in ferroelectrics journal July 2018
Physics and applications of charged domain walls journal November 2018
Intrinsic Conductance of Domain Walls in BiFeO 3 journal June 2019
Segregation Induced Self-Assembly of Highly Active Perovskite for Rapid Oxygen Reduction Reaction journal September 2018
Manipulation of Conductive Domain Walls in Confined Ferroelectric Nanoislands journal May 2019
Dielectric relaxation and local domain structures of ferroelectric PIMNT and PMNT single crystals journal October 2019