Scaling behavior of order parameters for the hybrid improper ferroelectric (Ca, Sr)3Ti2O7

被引：4

作者：

Kong, Jing ^{[1
]}

Manjon-Sanz, Alicia ^{[2
]}

Liu, Jue ^{[2
]}

Marlton, Frederick ^{[3
]}

Lo, Tsz Wing ^{[1
]}

Lei, Dangyuan ^{[1
]}

Jorgensen, Mads Ry Vogel ^{[4
,5
,6
]}

Pramanick, Abhijit ^{[1
,7
]}

机构：

[1] City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China

[2] Oak Ridge Natl Lab, Neutrons Scattering Div, Oak Ridge, TN 37831 USA

[3] Univ Technol Sydney, Sch Math & Phys Sci, Sydney, NSW 2007, Australia

[4] Aarhus Univ, Dept Chem, DK-8000 Aarhus C, Denmark

[5] Aarhus Univ, iNANO, DK-8000 Aarhus C, Denmark

[6] Lund Univ, MAX Lab 4, SE-22100 Lund, Sweden

[7] City Univ Hong Kong, Ctr Neutron Scattering, Hong Kong, Peoples R China

来源：

PHYSICAL REVIEW B | 2023年 / 107卷 / 22期

关键词：

DIFFRACTOMETER; PEROVSKITES;

D O I：

10.1103/PhysRevB.107.224103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：8

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