Polaronic Transport Induced by Competing Interfacial Magnetic Order in a La0.7Ca0.3MnO3/BiFeO3 Heterostructure

被引：20

作者：

Sheu, Y. M. ^{[1
]}

Trugman, S. A. ^{[1
]}

Yan, L. ^{[1
]}

Qi, J. ^{[2
]}

Jia, Q. X. ^{[1
]}

Taylor, A. J. ^{[1
]}

Prasankumar, R. P. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA

[2] Peac Inst Multiscale Sci, Chengdu 610225, Sichuan, Peoples R China

来源：

PHYSICAL REVIEW X | 2014年 / 4卷 / 02期

关键词：

DOUBLE-EXCHANGE; FERROMAGNETISM; PR1-XCAXMNO3; POLARIZATION; CROSSOVER; PHYSICS; METALS; FILMS;

D O I：

10.1103/PhysRevX.4.021001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using ultrafast optical spectroscopy, we show that polaronic behavior associated with interfacial antiferromagnetic order is likely the origin of tunable magnetotransport upon switching the ferroelectric polarity in a La0.7Ca0.3MnO3/BiFeO3 (LCMO/BFO) heterostructure. This is revealed through the difference in dynamic spectral weight transfer between LCMO and LCMO/BFO at low temperatures, which indicates that transport in LCMO/BFO is polaronic in nature. This polaronic feature in LCMO/BFO decreases in relatively high magnetic fields due to the increased spin alignment, while no discernible change is found in the LCMO film at low temperatures. These results thus shed new light on the intrinsic mechanisms governing magnetoelectric coupling in this heterostructure, potentially offering a new route to enhancing multiferroic functionality.

引用

页数：8

共 56 条

[1] NEW APPROACH TO THE THEORY OF SUPEREXCHANGE INTERACTIONS [J].

ANDERSON, PW .

PHYSICAL REVIEW, 1959, 115 (01) :2-13

[2]

[Anonymous], OPTICAL TECHNIQUES S

[3]

[Anonymous], PROG THEOR PHYS

[4] Ultrafast optical and far-infrared quasiparticle dynamics in correlated electron materials [J].

Averitt, RD ;

Taylor, AJ .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (50) :R1357-R1390

[5] Ultrafast conductivity dynamics in colossal magnetoresistance manganites [J].

Averitt, RD ;

Lobad, AI ;

Kwon, C ;

Trugman, SA ;

Thorsmolle, VK ;

Taylor, AJ .

PHYSICAL REVIEW LETTERS, 2001, 87 (01)

[6] Electrodynamics of correlated electron materials [J].

Basov, D. N. ;

Averitt, Richard D. ;

van der Marel, Dirk ;

Dressel, Martin ;

Haule, Kristjan .

REVIEWS OF MODERN PHYSICS, 2011, 83 (02) :471-541

[7] Tunnel magnetoresistance and robust room temperature exchange bias with multiferroic BiFeO3 epitaxial thin films [J].

Bea, H. ;

Bibes, M. ;

Cherifi, S. ;

Nolting, F. ;

Warot-Fonrose, B. ;

Fusil, S. ;

Herranz, G. ;

Deranlot, C. ;

Jacquet, E. ;

Bouzehouane, K. ;

Barthelemy, A. .

APPLIED PHYSICS LETTERS, 2006, 89 (24)

[8] Combining half-metals and multiferroics into epitaxial heterostructures for spintronics [J].

Béa, H ;

Bibes, M ;

Sirena, M ;

Herranz, G ;

Bouzehouane, K ;

Jacquet, E ;

Fusil, S ;

Paruch, P ;

Dawber, M ;

Contour, JP ;

Barthélémy, A .

APPLIED PHYSICS LETTERS, 2006, 88 (06)

[9] Two-component heat diffusion observed in LaMnO3 and La0.7Ca0.3MnO3 [J].

Bielecki, J. ;

Rauer, R. ;

Zanghellini, E. ;

Gunnarsson, R. ;

Dorr, K. ;

Borjesson, L. .

PHYSICAL REVIEW B, 2010, 81 (06)

[10] Suppression of Octahedral Tilts and Associated Changes in Electronic Properties at Epitaxial Oxide Heterostructure Interfaces [J].

Borisevich, A. Y. ;

Chang, H. J. ;

Huijben, M. ;

Oxley, M. P. ;

Okamoto, S. ;

Niranjan, M. K. ;

Burton, J. D. ;

Tsymbal, E. Y. ;

Chu, Y. H. ;

Yu, P. ;

Ramesh, R. ;

Kalinin, S. V. ;

Pennycook, S. J. .

PHYSICAL REVIEW LETTERS, 2010, 105 (08)

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