Persistent conductive footprints of 109 degrees domain walls in bismuth ferrite films

Using conductive and piezoforce microscopy, we reveal a complex picture of electronic transport at weakly conductive 109 degrees domain walls in bismuth ferrite films. Even once initial ferroelectric stripe domains are changed/erased, persistent conductive paths signal the original domain wall position. The conduction at such domain wall "footprints" is activated by domain movement and decays rapidly with time, but can be re-activated by opposite polarity voltage. The observed phenomena represent true leakage conduction rather than merely displacement currents. We propose a scenario of hopping transport in combination with thermionic injection over interfacial barriers controlled by the ferroelectric polarization. (C) 2014 AIP Publishing LLC.


Published in:
Applied Physics Letters, 104, 13
Year:
2014
Publisher:
Melville, Amer Inst Physics
ISSN:
0003-6951
Laboratories:




 Record created 2014-05-19, last modified 2018-03-17


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)