Jahn-Teller distortion driven magnetic polarons in magnetite

被引：138

作者：

Huang, H. Y. ^{[1
,2
]}

Chen, Z. Y. ^{[3
]}

Wang, R. -P. ^{[4
]}

de Groot, F. M. F. ^{[4
]}

Wu, W. B. ^{[1
]}

Okamoto, J. ^{[1
]}

Chainani, A. ^{[1
]}

Singh, A. ^{[1
]}

Li, Z. -Y. ^{[5
]}

Zhou, J. -S. ^{[5
]}

Jeng, H. -T. ^{[3
]}

Guo, G. Y. ^{[6
,7
]}

Park, Je-Geun ^{[8
,9
]}

Tjeng, L. H. ^{[10
]}

Chen, C. T. ^{[1
]}

Huang, D. J. ^{[1
,3
]}

机构：

[1] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

[2] Natl Tsing Hua Univ, Program Sci & Technol Synchrotron Light Source, Hsinchu 30013, Taiwan

[3] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30013, Taiwan

[4] Univ Utrecht, Inorgan Chem & Catalysis, Univ Weg 99, NL-3584 CG Utrecht, Netherlands

[5] Univ Texas Austin, Dept Mech Engn, Texas Mat Inst, Austin, TX 78712 USA

[6] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan

[7] Natl Ctr Theoret Sci, Div Phys, Hsinchu 30013, Taiwan

[8] Seoul Natl Univ, Dept Phys & Astron, Seoul 08826, South Korea

[9] Inst for Basic Sci Korea, Ctr Correlated Elect Syst, Seoul 08826, South Korea

[10] Max Planck Inst Chem Phys Solids, Nothnitzerstr 40, D-01187 Dresden, Germany

来源：

NATURE COMMUNICATIONS | 2017年 / 8卷

关键词：

X-RAY-SCATTERING; VERWEY TRANSITION; SPIN EXCITATIONS; HIGH-RESOLUTION; FE3O4; CONDUCTION; RAMAN; PHOTOEMISSION; GAP;

D O I：

10.1038/ncomms15929

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The first known magnetic mineral, magnetite, has unusual properties, which have fascinated mankind for centuries; it undergoes the Verwey transition around 120 K with an abrupt change in structure and electrical conductivity. The mechanism of the Verwey transition, however, remains contentious. Here we use resonant inelastic X-ray scattering over a wide temperature range across the Verwey transition to identify and separate out the magnetic excitations derived from nominal Fe2+ and Fe3+ states. Comparison of the experimental results with crystal-field multiplet calculations shows that the spin-orbital dd excitons of the Fe2+ sites arise from a tetragonal Jahn-Teller active polaronic distortion of the Fe2+O6 octahedra. These low-energy excitations, which get weakened for temperatures above 350 K but persist at least up to 550 K, are distinct from optical excitations and are best explained as magnetic polarons.

引用

页数：6

共 52 条

[1] Visualized effect of oxidation on magnetic recording fidelity in pseudo-single-domain magnetite particles [J].

Almeida, Trevor P. ;

Kasama, Takeshi ;

Muxworthy, Adrian R. ;

Williams, Wyn ;

Nagy, Lesleis ;

Hansen, Thomas W. ;

Brown, Paul D. ;

Dunin-Borkowski, Rafal E. .

NATURE COMMUNICATIONS, 2014, 5

[2] Resonant inelastic x-ray scattering studies of elementary excitations [J].

Ament, Luuk J. P. ;

van Veenendaal, Michel ;

Devereaux, Thomas P. ;

Hill, John P. ;

van den Brink, Jeroen .

REVIEWS OF MODERN PHYSICS, 2011, 83 (02) :705-767

[3] ORDERING AND ANTIFERROMAGNETISM IN FERRITES [J].

ANDERSON, PW .

PHYSICAL REVIEW, 1956, 102 (04) :1008-1013

[4] Anisotropic x-ray magnetic linear dichroism at the Fe L2,3 edges in Fe3O4 [J].

Arenholz, Elke ;

van der Laan, Gerrit ;

Chopdekar, Rajesh V. ;

Suzuki, Yuri .

PHYSICAL REVIEW B, 2006, 74 (09)

[5] Bimagnon studies in cuprates with resonant inelastic x-ray scattering at the O K edge. I. Assessment on La2CuO4 and comparison with the excitation at Cu L3 and Cu K edges [J].

Bisogni, V. ;

Simonelli, L. ;

Ament, L. J. P. ;

Forte, F. ;

Sala, M. Moretti ;

Minola, M. ;

Huotari, S. ;

van den Brink, J. ;

Ghiringhelli, G. ;

Brookes, N. B. ;

Braicovich, L. .

PHYSICAL REVIEW B, 2012, 85 (21)

[6] Short-Range Correlations in Magnetite above the Verwey Temperature [J].

Bosak, Alexey ;

Chernyshov, Dmitry ;

Hoesch, Moritz ;

Piekarz, Przemyslaw ;

Le Tacon, Mathieu ;

Krisch, Michael ;

Kozlowski, Andrzej ;

Oles, Andrzej M. ;

Parlinski, Krzysztof .

PHYSICAL REVIEW X, 2014, 4 (01)

[7] The structure of magnetite and the spinels. [J].

Bragg, WH .

NATURE, 1915, 95 :561-561

[8] Magnetic Excitations and Phase Separation in the Underdoped La2-xSrxCuO4 Superconductor Measured by Resonant Inelastic X-Ray Scattering [J].

Braicovich, L. ;

van den Brink, J. ;

Bisogni, V. ;

Moretti Sala, M. ;

Ament, L. J. P. ;

Brookes, N. B. ;

De Luca, G. M. ;

Salluzzo, M. ;

Schmitt, T. ;

Strocov, V. N. ;

Ghiringhelli, G. .

PHYSICAL REVIEW LETTERS, 2010, 104 (07)

[9] HIGH-RESOLUTION PHOTOEMISSION SPECTROSCOPY OF THE VERWEY TRANSITION IN FE3O4 [J].

CHAINANI, A ;

YOKOYA, T ;

MORIMOTO, T ;

TAKAHASHI, T ;

TODO, S .

PHYSICAL REVIEW B, 1995, 51 (24) :17976-17979

[10] Magnetic circular dichroism in Fe 2p resonant photoemission of magnetite -: art. no. 085107 [J].

Chen, J ;

Huang, DJ ;

Tanaka, A ;

Chang, CF ;

Chung, SC ;

Wu, WB ;

Chen, CT .

PHYSICAL REVIEW B, 2004, 69 (08)

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