Lattice distortions and the metal-insulator transition in pure and Ti-substituted Ca3Ru2O7

被引：3

作者：

Petkov, V ^{[1
]}

Rao, T. Durga ^{[1
,2
]}

Zafar, A. ^{[1
]}

Abeykoon, A. M. Milinda ^{[3
]}

Fletcher, E. ^{[4
]}

Peng, J. ^{[5
]}

Mao, Z. Q. ^{[6
]}

Ke, X. ^{[4
]}

机构：

[1] Cent Michigan Univ, Dept Phys, Mt Pleasant, MI 48858 USA

[2] GITAM, Dept Phys, Visakhapatnam 530045, Andhra Pradesh, India

[3] Brookhaven Natl Lab, Photon Sci Div, Upton, NY 11973 USA

[4] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[5] Southeast Univ, Sch Phys, Nanjing, Peoples R China

[6] Penn State Univ, Dept Phys, State Coll, PA 16802 USA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2023年 / 35卷 / 01期

基金：

美国国家科学基金会;

关键词：

lattice; distortions; metal-insulator transition; strongly correlated systems;

D O I：

10.1088/1361-648X/ac9dda

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report pair distribution function studies on the relationship between the metal-insulator transition (MIT) and lattice distortions in pure and Ti-substituted bilayer Ca3Ru2O7. Structural refinements performed as a function of temperature, magnetic field and length scale reveal the presence of lattice distortions not only within but also orthogonal to the bilayers. Because of the distortions, the local and average crystal structure differ across a broad temperature region extending from room temperature to temperatures below the MIT. The coexistence of distinct lattice distortions is likely to be behind the marked structural flexibility of Ca3Ru2O7 under external stimuli. This observation highlights the ubiquity of lattice distortions in an archetypal Mott system and calls for similar studies on other families of strongly correlated materials.

引用

页数：10

共 26 条

[11] Observation of Quasi-Two-Dimensional Polar Domains and Ferroelastic Switching in a Metal, Ca3Ru2O7 [J].