Scaling behavior of order parameters for the hybrid improper ferroelectric (Ca,Sr)3Ti2 O7

Jing Kong; Alicia Manjón-Sanz; Jue Liu; Frederick Marlton; Tsz Wing Lo; Dangyuan Lei; Mads Ry Vogel Jørgensen; Abhijit Pramanick

doi:10.1103/PhysRevB.107.224103

Scaling behavior of order parameters for the hybrid improper ferroelectric (Ca,Sr)3Ti2 O7

Jing Kong, Alicia Manjón-Sanz, Jue Liu, Frederick Marlton, Tsz Wing Lo, Dangyuan Lei, Mads Ry Vogel Jørgensen, Abhijit Pramanick

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Abstract

We show that in contrast to the conventional view of a mean-field Landau-type behavior, the oxygen octahedral tilt (R) and polarization (P) in the A3B2O7 Ruddlesden-Popper hybrid improper ferroelectric (Ca,Sr)3Ti2O7 exhibits the scaling behavior of a 2D Ising class near the para-to-ferroelectric transition temperature (Tc). We also show that P exhibits an additional transition from a 2D Ising to a 3D mean-field critical behavior at a temperature Td<Tc, which is driven by enhanced interlayer dipolar correlations due to an increase in the ferroelectrically active B-site centered dipoles.

Original language	English
Article number	224103
Journal	Physical Review B
Volume	107
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.107.224103
State	Published - Jun 1 2023

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title = "Scaling behavior of order parameters for the hybrid improper ferroelectric (Ca,Sr)3Ti2 O7",

abstract = "We show that in contrast to the conventional view of a mean-field Landau-type behavior, the oxygen octahedral tilt (R) and polarization (P) in the A3B2O7 Ruddlesden-Popper hybrid improper ferroelectric (Ca,Sr)3Ti2O7 exhibits the scaling behavior of a 2D Ising class near the para-to-ferroelectric transition temperature (Tc). We also show that P exhibits an additional transition from a 2D Ising to a 3D mean-field critical behavior at a temperature Td",

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AU - Kong, Jing

AU - Manjón-Sanz, Alicia

AU - Liu, Jue

AU - Marlton, Frederick

AU - Lo, Tsz Wing

AU - Lei, Dangyuan

AU - Jørgensen, Mads Ry Vogel

AU - Pramanick, Abhijit

PY - 2023/6/1

Y1 - 2023/6/1

N2 - We show that in contrast to the conventional view of a mean-field Landau-type behavior, the oxygen octahedral tilt (R) and polarization (P) in the A3B2O7 Ruddlesden-Popper hybrid improper ferroelectric (Ca,Sr)3Ti2O7 exhibits the scaling behavior of a 2D Ising class near the para-to-ferroelectric transition temperature (Tc). We also show that P exhibits an additional transition from a 2D Ising to a 3D mean-field critical behavior at a temperature Td

AB - We show that in contrast to the conventional view of a mean-field Landau-type behavior, the oxygen octahedral tilt (R) and polarization (P) in the A3B2O7 Ruddlesden-Popper hybrid improper ferroelectric (Ca,Sr)3Ti2O7 exhibits the scaling behavior of a 2D Ising class near the para-to-ferroelectric transition temperature (Tc). We also show that P exhibits an additional transition from a 2D Ising to a 3D mean-field critical behavior at a temperature Td

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ER -

Scaling behavior of order parameters for the hybrid improper ferroelectric (Ca,Sr)3Ti2 O7

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