Publications de Petr Yudin | EPFL Graph Search

Physics and applications of charged domain walls

Alexander Tagantsev, Tomas Sluka, Petr Yudin, Petr Bednyakov

The charged domain wall is an ultrathin (typically nanosized) interface between two domains; it carries bound charge owing to a change of normal component of spontaneous polarization on crossing the wall. In contrast to hetero-interfaces between different ...

2018

Velocity Control of 180 degrees Domain Walls in Ferroelectric Thin Films by Electrode Modification

Nava Setter, Alexander Tagantsev, Tomas Sluka, Petr Yudin, Ludwig Feigl

The velocity of individual 1800 domain walls in thin ferroelectric films of PbZr0.1Ti0.9O3 is strongly dependent on the thickness of the top Pt electrode made by electron-beam induced deposition (EBID). We show that when the thickness is varied in the rang ...

Amer Chemical Soc2016

Thick domain walls in non-magnetic ferroics

Alexander Tagantsev, Petr Yudin, Konstantin Shapovalov

Recent developments in the physics of non-magnetic ferroics identified possible functionality of domain walls in these materials, which specifies the current interest to the internal structure of the walls. In this context, the wall thickness itself can be ...

Taylor & Francis Ltd2016

Moving antiphase boundaries using an external electric field

Nava Setter, Alexander Tagantsev, Kaushik Vaideeswaran, Petr Yudin, Konstantin Shapovalov

Antiphase boundaries (APBs) are unique domain walls that may demonstrate switchable polarization in otherwise non-ferroelectric materials such as SrTiO3 and PbZrO3. The current study explores the possibility of displacing such domain walls at the nanoscale ...

Amer Inst Physics2015

Controlling domain wall motion in ferroelectric thin films

Nava Setter, Alexander Tagantsev, Petr Yudin, Ludwig Feigl

Domain walls in ferroic materials have attracted significant interest in recent years, in particular because of the unique properties that can be found in their vicinity(1-3). However, to fully harness their potential as nanoscale functional entities(4,5), ...

Nature Publishing Group2015

Anomalously thick domain walls in ferroelectrics

Nava Setter, Alexander Tagantsev, Maxim Gureev, Tomas Sluka, Petr Yudin

Using the Landau theory we demonstrate the possibility of unusual, anomalously thick ferroelectric domain walls, where the order parameter rotates with a nearly constant modulus as in ferromagnets. The effect occurs in 90 degrees charged domain walls and i ...

Amer Physical Soc2015

Anomalously thick domain walls in ferroelectrics (vol 91, 060102, 2015)

Nava Setter, Alexander Tagantsev, Maxim Gureev, Tomas Sluka, Petr Yudin

Amer Physical Soc2015

Upper bounds for flexoelectric coefficients in ferroelectrics (vol 104, 082913, 2014)

Alexander Tagantsev, Petr Yudin

Amer Inst Physics2015

Room temperature concurrent formation of ultra-dense arrays of ferroelectric domain walls

Nava Setter, Alexander Tagantsev, Mahamudu Mtebwa, Petr Yudin, Ludwig Feigl, Konstantin Shapovalov

Properties of ferroelectric domain walls are attractive for future nano- and optoelectronics. An important element is the potential to electrically erase/rewrite domain walls inside working devices. Dense domain wall patterns, formed upon cooling through t ...

American Institute of Physics2015

Bent Ferroelectric Domain Walls as Reconfigurable Metallic-Like Channels

Nava Setter, Alexander Tagantsev, Enrico Colla, Igor Stolichnov, Tomas Sluka, Petr Yudin, Ludwig Feigl, Xiankui Wei, Arnaud Robert André Crassous, Konstantin Shapovalov

Use of ferroelectric domain-walls in future electronics requires that they are stable, rewritable conducting channels. Here we demonstrate nontherrnally activated metallic-like conduction in nominally uncharged, bent, rewritable ferroelectric-ferroelastic ...

Amer Chemical Soc2015

Elastic Coupling between Nonferroelastic Domain Walls

Nava Setter, Alexander Tagantsev, Petr Yudin, Konstantin Shapovalov

We reveal a strong elastic interaction between nonferroelastic domain walls in ferroelectric thin films. This interaction, having no analogue in bulk materials, is governed by elastic fields that are associated with the domain walls and extends to distance ...

American Physical Society2014

Upper bounds for flexoelectric coefficients in ferroelectrics

Alexander Tagantsev, Petr Yudin

Flexoelectric effect is the response of electric polarization to the mechanical strain gradient. At the nano-scale, where large strain gradients are expected, the flexoelectric effect becomes appreciable and may substitute piezoelectric effect in centrosym ...

American Institute of Physics2014

Influence of flexoelectric coupling on domain patterns in ferroelectrics

Nava Setter, Alexander Tagantsev, Petr Yudin

Using Ginzburg-Landau theory and two-dimensional (2D) phase field simulations, we analyze the influence of flexoelectric coupling on the domain patterns in ferroelectrics. The phase field simulations predict that a high strength of the flexoelectric coupli ...

American Physical Society2014

Controlled stripes of ultrafine ferroelectric domains

Nava Setter, Alexander Tagantsev, Igor Stolichnov, Silviu Cosmin Sandu, Tomas Sluka, Mahamudu Mtebwa, Petr Yudin, Ludwig Feigl, Xiankui Wei, Konstantin Shapovalov

In the pursuit of ferroic-based (nano) electronics, it is essential to minutely control domain patterns and domain switching. The ability to control domain width, orientation and position is a prerequisite for circuitry based on fine domains. Here, we deve ...

Nature Publishing Group2014

Fundamentals of flexoelectricity in solids

Alexander Tagantsev, Petr Yudin

The flexoelectric effect is the response of electric polarization to a mechanical strain gradient. It can be viewed as a higher-order effect with respect to piezoelectricity, which is the response of polarization to strain itself. However, at the nanoscale ...

Institute of Physics2013

Bistability of ferroelectric domain walls: Morphotropic boundary and strain effects

Nava Setter, Alexander Tagantsev, Petr Yudin

The internal structure of neutral 180 degrees domain walls in perovskite-type ferroelectrics is studied in terms of Landau theory taking into account electromechanical coupling. The study is focused on the wall bistability, a factor of potential interest f ...

American Physical Society2013

Structural phase transitions and electronic phenomena at 180-degree domain walls in rhombohedral BaTiO3

Nava Setter, Alexander Tagantsev, Petr Yudin

The structure and electronic phenomena at the 180-degree domain wall in the rhombohedral phase of BaTiO3 are described using Landau-Ginzburg-Devonshire theory. Dependent on the wall orientation, two types of domain wall behaviors are identified. The low-en ...

American Physical Society2013

Bichiral structure of ferroelectric domain walls driven by flexoelectricity

Nava Setter, Alexander Tagantsev, Petr Yudin

The influence of flexoelectric coupling on the internal structure of neutral domain walls in the tetragonal phase of perovskite ferroelectrics is studied. The effect is shown to lower the symmetry of 180 degrees walls which are oblique with respect to the ...

American Physical Society2012

Impact of Strain Effects on the Stability of Ising Walls in Ferroelectrics

Nava Setter, Alexander Tagantsev, Petr Yudin

The stability of Ising 180-degree domain walls with respect to appearance of chirality is analytically studied in tetragonal perovskite-type ferroelectrics taking into account electro-mechanical coupling. It is shown that the widely used approximation negl ...

2012