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[Fizinfo] Idopont valtozas - Y. Tokura szeminarium

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  • From: Mihaly Gyorgy <mihaly AT>
  • To: fizinfo AT
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  • Subject: [Fizinfo] Idopont valtozas - Y. Tokura szeminarium
  • Date: Wed, 31 May 2006 15:29:20 +0200
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Prof. Yoshinori Tokura eloadasanak kezdete masfel oraval korabbra kerult,
azaz delelott 10 ora helyett 8.30-kor kezdodik (repulojarat valtozas miatt).

2006. június 6. kedd, reggel. 8.30
BME Fizikai Intézet, Fizika Tanszék szemináriuma
Bp. XI. Budafoki út 8., F-épület, III. lépcsoház, II. em. 13.

Prof. Yoshinori Tokura
Department of Applied Physics, University of Tokyo
Correlated Electron Research Center, AIST Tsukuba

Competing orders and gigantic responses in transition-metal oxides with correlated electrons

Transition-metal oxides offer an intriguing playground to find interesting electronic property/functionality, such as high-temperature superconductivity in copper-oxides and colossal magnetoresistance in manganese-oxides. In those materials, a vast number of electrons, comparable to the number of the constituent atoms, are strongly interacting with each other and tend to lose their mobility. These correlated electrons with internal degrees of freedom- charge, spin, and orbital-, when placed on the specific topological atomic lattice, may form the rich and complex phases or the self-organized structures. Those are, for example, charge-spin stripes, charge-orbital ordered states, and liquid-crystal like states with anisotropic charge-spin-orbital correlations. Here I would present some of ample examples of the correlated-electron’s ordering patterns and show how dramatically they can respond to external stimuli, say, electric/magnetic fields, light, and pressure. In particular, the response of correlated electrons can be huge and fast in the vicinity of the boundary of the competing electronic phases, which promises future application. Topics I work on here include also the recent attempt to attain the gigantic magneto-electric effect in multiferroics; controlling the direction as well as the magnitude of electric polarization in terms of tiny magnetic field.

G. Mihaly
Department of Physics
Budapest University of Technology and Economics

  • [Fizinfo] Idopont valtozas - Y. Tokura szeminarium, Mihaly Gyorgy, 05/31/2006

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