TY  - JOUR
A1  - de Jong, S.
A1  - Kukreja, R.
A1  - Trabant, C.
A1  - Pontius, N.
A1  - Chang, C. F.
A1  - Kachel, T.
A1  - Beye, Martin
A1  - Sorgenfrei, Nomi
A1  - Back, C. H.
A1  - Braeuer, B.
A1  - Schlotter, W. F.
A1  - Turner, J. J.
A1  - Krupin, O.
A1  - Doehler, M.
A1  - Zhu, D.
A1  - Hossain, M. A.
A1  - Scherz, A. O.
A1  - Fausti, D.
A1  - Novelli, F.
A1  - Esposito, M.
A1  - Lee, W. S.
A1  - Chuang, Y. D.
A1  - Lu, D. H.
A1  - Moore, R. G.
A1  - Yi, M.
A1  - Trigo, M.
A1  - Kirchmann, P.
A1  - Pathey, L.
A1  - Golden, M. S.
A1  - Buchholz, Marcel
A1  - Metcalf, P.
A1  - Parmigiani, F.
A1  - Wurth, W.
A1  - Föhlisch, Alexander
A1  - Schuessler-Langeheine, Christian
A1  - Duerr, H. A.
T1  - Speed limit of the insulator-metal transition in magnetite
JF  - Nature materials
N2  - 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).
Y1  - 2013
U6  - https://doi.org/10.1038/NMAT3718
SN  - 1476-1122
SN  - 1476-4660
VL  - 12
IS  - 10
SP  - 882
EP  - 886
PB  - Nature Publ. Group
CY  - London
ER  - 
TY  - JOUR
A1  - Schubert, Mikkel
A1  - Jonsson, Hakon
A1  - Chang, Dan
A1  - Sarkissian, Clio Der
A1  - Ermini, Luca
A1  - Ginolhac, Aurelien
A1  - Albrechtsen, Anders
A1  - Dupanloup, Isabelle
A1  - Foucal, Adrien
A1  - Petersen, Bent Larsen
A1  - Fumagalli, Matteo
A1  - Raghavan, Maanasa
A1  - Seguin-Orlando, Andaine
A1  - Korneliussen, Thorfinn S.
A1  - Velazquez, Amhed M. V.
A1  - Stenderup, Jesper
A1  - Hoover, Cindi A.
A1  - Rubin, Carl-Johan
A1  - Alfarhan, Ahmed H.
A1  - Alquraishi, Saleh A.
A1  - Al-Rasheid, Khaled A. S.
A1  - MacHugh, David E.
A1  - Kalbfleisch, Ted
A1  - MacLeod, James N.
A1  - Rubin, Edward M.
A1  - Sicheritz-Ponten, Thomas
A1  - Andersson, Leif
A1  - Hofreiter, Michael
A1  - Marques-Bonet, Tomas
A1  - Gilbert, M. Thomas P.
A1  - Nielsen, Rasmus
A1  - Excoffier, Laurent
A1  - Willerslev, Eske
A1  - Shapiro, Beth
A1  - Orlando, Ludovic
T1  - Prehistoric genomes reveal the genetic foundation and cost of horse domestication
JF  - Proceedings of the National Academy of Sciences of the United States of America
Y1  - 2014
U6  - https://doi.org/10.1073/pnas.1416991111
SN  - 0027-8424
VL  - 111
IS  - 52
SP  - E5661
EP  - E5669
PB  - National Acad. of Sciences
CY  - Washington
ER  - 
TY  - JOUR
A1  - Parkinson, P.
A1  - Aharon, E.
A1  - Chang, M. H.
A1  - Dosche, Carsten
A1  - Frey, G. L.
A1  - Köhler, Anna
A1  - Herz, L. M.
T1  - Dimensionality-dependent energy transfer in polymer-intercalated SnS2 nanocomposites
N2  - We have investigated the influence of dimensionality on the excitation-transfer dynamics in a conjugated polymer blend. Using time-resolved photoluminescence spectroscopy, we have measured the transfer transients for both a three-dimensional blend film and for quasi-two-dimensional monolayers formed through intercalation of the polymer blend between the crystal planes of an inorganic SnS2 matrix. We compare the experimental data with a simple, dimensionality- dependent model based on electronic coupling between electronic transition moments taken to be point dipoles. Within this approximation, the energy-transfer dynamics is found to adopt a three-dimensional character in the solid film and a two-dimensional nature in the monolayers present in the SnS2-polymer nanocomposite.
Y1  - 2007
UR  - http://prb.aps.org/toc/PRB/v75/i16
U6  - https://doi.org/10.1103/Physrevb.75.165206
ER  -