de Jong, S., Kukreja, R., Trabant, C., Pontius, N., Chang, C. F., Kachel, T., Beye, M., Sorgenfrei, F., Back, C. H., Braeuer, B., Schlotter, W. F., Turner, J. J., Krupin, O., Doehler, M., Zhu, D., Hossain, M. A., Scherz, A. O., Fausti, D., Novelli, F., Esposito, M., Lee, W. S., Chuang, Y. D., Lu, D. H., Moore, R. G., Yi, M., Trigo, M., Kirchmann, P., Pathey, L., Golden, M. S., Buchholz, M., Metcalf, P., Parmigiani, F., Wurth, W., Foehlisch, A., Schuessler-Langeheine, C. and Duerr, H. A. (2013). Speed limit of the insulator-metal transition in magnetite. Nat. Mater., 12 (10). S. 882 - 887. LONDON: NATURE PUBLISHING GROUP. ISSN 1476-4660

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Abstract

As the oldest known magnetic material, magnetite (Fe3O4) has fascinated mankind for millennia. As the first oxide in which a relationship between electrical conductivity and fluctuating/localized electronic order was shown(1), magnetite represents a model system for understanding correlated oxides in general. Nevertheless, the exact mechanism of the insulator-metal, or Verwey, transition has long remained inaccessible(2-8). Recently, three- Fe- site lattice distortions called trimeronswere identified as the characteristic building blocks of the low-temperature insulating electronically ordered phase(9). Here we investigate the Verwey transition with pump- probe X- ray diffraction and optical reflectivity techniques, and show how trimerons become mobile across the insulator-metal transition. We find this to be a two- step process. After an initial 300 fs destruction of individual trimerons, phase separation occurs on a 1.5 +/- 0.2 ps timescale to yield residual insulating and metallic regions. This work establishes the speed limit for switching in future oxide electronics(10).

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
de Jong, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kukreja, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Trabant, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pontius, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chang, C. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kachel, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Beye, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sorgenfrei, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Back, C. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Braeuer, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schlotter, W. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Turner, J. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Krupin, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Doehler, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zhu, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hossain, M. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Scherz, A. O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fausti, D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Novelli, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Esposito, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lee, W. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Chuang, Y. D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lu, D. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Moore, R. G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Yi, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Trigo, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kirchmann, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pathey, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Golden, M. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Buchholz, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Metcalf, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Parmigiani, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wurth, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Foehlisch, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schuessler-Langeheine, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Duerr, H. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-475430
DOI: 10.1038/NMAT3718
Journal or Publication Title: Nat. Mater.
Volume: 12
Number: 10
Page Range: S. 882 - 887
Date: 2013
Publisher: NATURE PUBLISHING GROUP
Place of Publication: LONDON
ISSN: 1476-4660
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
VERWEY TRANSITION; FLUCTUATIONSMultiple languages
Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/47543

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