Alexander Tagantsev

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Publications associées (131)

Flexoelectric Effect in Solids

Alexander Tagantsev

Flexoelectricity-the coupling between polarization and strain gradients-is a universal effect allowed by symmetry in all materials. Following its discovery several decades ago, studies of flexoelectricity in solids have been scarce due to the seemingly sma ...

Annual Reviews2013

Free-electron gas at charged domain walls in insulating BaTiO3

Nava Setter, Alexander Tagantsev, Tomas Sluka, Petr Bednyakov

Hetero interfaces between metal-oxides display pronounced phenomena such as semiconductor-metal transitions, magnetoresistance, the quantum hall effect and superconductivity. Similar effects at compositionally homogeneous interfaces including ferroic domai ...

Nature Publishing Group2013

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

Role of high-order electromechanical coupling terms in thermodynamics of ferroelectric thin films

Alexander Tagantsev, Alexander Kvasov

Currently used methods for the description of thermodynamics of ferroelectric thin films (Landau theory or ab initio based Monte Carlo simulations) are based on an energy expansion in terms of internal degrees of freedom. It was shown that these methods ca ...

American Physical Society2013

Thin film bulk acoustic wave resonators tuning from first principles

Alexander Tagantsev, Alexander Kvasov

Being important for the antiresonance frequency tuning of tunable thin Film Bulk Acoustic wave Resonators (FBARs), the non-linear electrostrictive coefficient was for the first time calculated for BaTiO3 and SrTiO3 using ab initio methods. Further, taking ...

American Institute of Physics2013

Ferroelectric ceramic tunability in transversely oriented static and transient electric fields

Alexander Tagantsev

The dielectric tunability of ferroelectric ceramics in the paraelectric phase is studied theoretically for the case where the dc bias electric field is orthogonal to the ac electric field of a signal. Results are obtained in the most general form and then ...

American 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

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

The origin of antiferroelectricity in PbZrO3

Nava Setter, Alexander Tagantsev, Kaushik Vaideeswaran

Antiferroelectrics are essential ingredients for the widely applied piezoelectric and ferroelectric materials: the most common ferroelectric, lead zirconate titanate is an alloy of the ferroelectric lead titanate and the antiferroelectric lead zirconate. A ...

Nature Publishing Group2013

Positive effective Q(12) electrostrictive coefficient in perovskites

Alexander Tagantsev, Alexander Kvasov

It is demonstrated that for classical perovskites, such as BaTiO3; SrTiO3, and PbTiO3, electrostrictive strain induced by an electric field may not obey traditionally considered "extension along the field and contraction perpendicular to it" behavior if th ...

American Institute of Physics2012

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