Time-resolved Studies of Phase Transition Dynamics in Strongly Correlated Manganites

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Ultrafast light pulses can be used to control electronic, magnetic and structural phases of complex solids. Here, we investigate the dynamics of insulator-metal phase transitions in colossal magnetoresistive (CMR) manganites by a combination of femtosecond visible-to-midinfrared pump-probe techniques and transport measurements. We show that an insulator-metal transition can be stimulated in CMR manganites by both above bandgap excitation and selective excitation of individual vibrational degrees of freedom. These two approaches rely on the ultrafast manipulation of parameters controlling the electronic filling and the electronic bandwidth respectively, extending the concepts of filling and bandwidth control to the ultrafast timescale. The ultrafast ... continued below

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Rini, M; Tobey, R; Dean, N; Wall, S; Ehrke, H; Zhu, Y et al. December 5, 2008.

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Ultrafast light pulses can be used to control electronic, magnetic and structural phases of complex solids. Here, we investigate the dynamics of insulator-metal phase transitions in colossal magnetoresistive (CMR) manganites by a combination of femtosecond visible-to-midinfrared pump-probe techniques and transport measurements. We show that an insulator-metal transition can be stimulated in CMR manganites by both above bandgap excitation and selective excitation of individual vibrational degrees of freedom. These two approaches rely on the ultrafast manipulation of parameters controlling the electronic filling and the electronic bandwidth respectively, extending the concepts of filling and bandwidth control to the ultrafast timescale. The ultrafast vibrational control of correlated-electron phases may provide new insights into the role played by lattice vibrations in determining the electronic properties of complex solids.

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  • THE LXIII YAMADA CONFERENCE ON PHOTO-INDUCED PHASE TRANSITION AND COOPERATIVE PHENOMENA, Osaka, Japan, 11/11/08-11/15/08

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  • Report No.: LBNL-3667E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 985367
  • Archival Resource Key: ark:/67531/metadc1014172

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  • December 5, 2008

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  • Oct. 14, 2017, 8:36 a.m.

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  • Oct. 17, 2017, 7:01 p.m.

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Rini, M; Tobey, R; Dean, N; Wall, S; Ehrke, H; Zhu, Y et al. Time-resolved Studies of Phase Transition Dynamics in Strongly Correlated Manganites, article, December 5, 2008; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc1014172/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.