LaSrVO4: A candidate for the spin-orbital liquid state

被引：11

作者：

Dun, Z. L. ^{[1
]}

Garlea, V. O. ^{[2
]}

Yu, C. ^{[3
]}

Ren, Y. ^{[3
]}

Choi, E. S. ^{[4
]}

Zhang, H. M. ^{[5
]}

Dong, S. ^{[5
]}

Zhou, H. D. ^{[1
,4
]}

机构：

[1] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[2] Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA

[3] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[4] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA

[5] Southeast Univ, Dept Phys, Nanjing 211189, Jiangsu, Peoples R China

来源：

PHYSICAL REVIEW B | 2014年 / 89卷 / 23期

基金：

美国国家科学基金会;

关键词：

LAYERED PEROVSKITE; MAGNETIC-BEHAVIOR; SINGLE-CRYSTAL; ORDER; FRUSTRATION; TRANSITION; OXIDES; FLUCTUATIONS; INSULATOR; SR2IRO4;

D O I：

10.1103/PhysRevB.89.235131

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A layered perovskite LaSrVO4 was studied by neutron diffraction, pair distribution function measurement using synchrotron x-ray, susceptibility, and specific heat measurements, and first-principles calculation. The results show (i) a weak structural distortion around 100 K with the existence of orbital fluctuations both above and below it; (ii) the absence of the long range magnetic ordering down to 0.35 K but the appearance of a short range magnetic ordering around 11 K with a T-2 behavior of the specific heat below it. Meanwhile, the calculation based on the density functional theory predicts a magnetic ordered ground state. All facts indicate a melting of the magnetic ordering due to the orbital fluctuations in LaSrVO4, which makes it a rare candidate for the spin-orbital liquid state related to t(2g) orbitals.

引用

页数：7

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