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  Speed limit of the insulator-metal transition in magnetite

de Jong, S., Kukreja, R., Trabant, C., Pontius, N., Chang, C. F., Kachel, T., et al. (2013). Speed limit of the insulator-metal transition in magnetite. Nature Materials, 12(10), 882-886. doi:10.1038/nmat3718.

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 Creators:
de Jong, S., Author
Kukreja, R., Author
Trabant, C., Author
Pontius, N., Author
Chang, C. F.1, Author           
Kachel, T., Author
Beye, M., Author
Sorgenfrei, F., Author
Back, C. H., Author
Brauer, B., Author
Schlotter, W. F., Author
Turner, J. J., Author
Krupin, O., Author
Doehler, M., Author
Zhu, D., Author
Hossain, M. A., Author
Scherz, A. O., Author
Fausti, D., Author
Novelli, F., Author
Esposito, M., Author
Lee, W. S., AuthorChuang, Y. D., AuthorLu, D. H., AuthorMoore, R. G., AuthorYi, M., AuthorTrigo, M., AuthorKirchmann, P., AuthorPathey, L., AuthorGolden, M. S., AuthorBuchholz, M., AuthorMetcalf, P., AuthorParmigiani, F., AuthorWurth, W., AuthorFohlisch, A., AuthorSchussler-Langeheine, C., AuthorDurr, H. A., Author more..
Affiliations:
1Chun-Fu Chang, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863447              

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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).

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Language(s): eng - English
 Dates: 2013-10-01
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 670756
ISI: 000324736000012
DOI: 10.1038/nmat3718
 Degree: -

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Title: Nature Materials
Source Genre: Journal
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Pages: - Volume / Issue: 12 (10) Sequence Number: - Start / End Page: 882 - 886 Identifier: ISSN: 1476-1122