Pseudo-proper ferroelectricity in thin films

Details Pseudo-proper ferroelectricity in thin films Pseudo-proper ferroelectricity in thin films

2009-07-13

arxiv.org/abs/0907.2236v3

Phys. Rev. B 81, 172105 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

v2: partially rewritten. v3: totally rewritten (statement about the suppression of the multidomain state without electrodes co

Scientific paper

We study ferroelectricity in thin films of pseudo-proper ferroelectrics such as the so-called spiral multiferroics. We find that this type of ferroelectricity stands better against depolarizing fields than conventional one. Its single-domain state can be easily preserved by metallic electrodes even in ultrathin films. In fact, single-domain ferroelectricty can be generated as a metastable state in the absence of electrodes. We also find a new regime of small thickness where unscreened films develop unusual multi-domain states with properties determined by non-electrostatic boundary conditions.

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