Noncollinear Ordering of the Orbital Magnetic Moments in Magnetite

被引：14

作者：

Elnaggar, H. ^{[1
]}

Sainctavit, Ph. ^{[2
]}

Juhin, A. ^{[2
]}

Lafuerza, S. ^{[3
]}

Wilhelm, F. ^{[3
]}

Rogalev, A. ^{[3
]}

Arrio, M. -A. ^{[2
]}

Brouder, Ch. ^{[2
]}

van der Linden, M. ^{[1
,3
]}

Kakol, Z. ^{[4
]}

Sikora, M. ^{[5
]}

Haverkort, M. W. ^{[6
]}

Glatzel, P. ^{[3
]}

de Groot, F. M. F. ^{[1
]}

机构：

[1] Univ Utrecht, Debye Inst Nanomat Sci, NL-3584 CA Utrecht, Netherlands

[2] Sorbonne Univ, Inst Mineral Phys Mat & Cosmochim, MNHN, CNRS,UMR7590, F-75252 Paris 05, France

[3] European Synchrotron Radiat Facil, CS40220, F-38043 Grenoble 9, France

[4] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Mickiewicza 30, PL-30059 Krakow, Poland

[5] AGH Univ Sci & Technol, Acad Ctr Mat & Nanotechnol, Mickiewicza 30, PL-30059 Krakow, Poland

[6] Heidelberg Univ, Inst Theoret Phys, Philosophenweg 19, D-69120 Heidelberg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 20期

基金：

欧洲研究理事会;

关键词：

X-RAY-ABSORPTION; VERWEY TRANSITION; CIRCULAR-DICHROISM; ANGULAR-DEPENDENCE; PRE-EDGE; TEMPERATURE; SCATTERING; PHYSICS; FE3O4;

D O I：

10.1103/PhysRevLett.123.207201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnitude of the orbital magnetic moment and its role as a trigger of the Verwey transition in the prototypical Mott insulator, magnetite, remain contentious. Using 1s2p resonant inelastic x-ray scattering angle distribution (RIXS-AD), we prove the existence of noncollinear orbital magnetic ordering and infer the presence of dynamical distortion creating a polaronic precursor for the metal to insulator transition. These conclusions are based on a subtle angular shift of the RIXS-AD spectral intensity as a function of the magnetic field orientation. Theoretical simulations show that these results are only consistent with noncollinear magnetic orbital ordering. To further support these claims we perform Fe K-edge x-ray magnetic circular dichroism in order to quantify the Fe average orbital magnetic moment.

引用

页数：6

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