Universität zu Köln

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:	Creators Email ORCID ORCID Put Code de Jong, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kukreja, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Trabant, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pontius, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chang, C. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kachel, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Beye, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sorgenfrei, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Back, C. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Braeuer, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schlotter, W. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Turner, J. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Krupin, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Doehler, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhu, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hossain, M. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Scherz, A. O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fausti, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Novelli, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Esposito, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lee, W. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chuang, Y. D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lu, D. H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Moore, R. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Yi, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Trigo, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kirchmann, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pathey, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Golden, M. S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Buchholz, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Metcalf, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Parmigiani, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wurth, W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Foehlisch, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schuessler-Langeheine, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Duerr, H. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
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:	Keywords Language VERWEY TRANSITION; FLUCTUATIONS Multiple languages Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/47543