イベントEvents

カデットプログラム後援セミナー

カデットプログラム後援セミナー

2013年9月11日

カデットプログラム後援セミナー

日時:2013年9月11日(水) 14:30~16:00
場所:基礎工学研究科 D棟4階D404-408共用セミナー室
講演題目:Reconstruction, Formation of 2D Electron-Gas, and
Electron-Spin-Lattice Interplay at Oxide Interfaces
講演者:Dr. Yimei Zhu
(Department of Condensed Matter Physics,Brookhaven National Laboratory)

要旨:High mobility conduction at the interface of two dissimilar
materials and the ability to manipulate the carrier density and mobility
of the interfacial charge by electrostatic gating have yielded many
fascinating phenomena in the past decade. In this presentation I will
give an overview of our recent work on interfacial reconstruction,
formation of two-dimensional electron-gas, and observations of
completing degree of freedom of charge-orbital-spin-lattice at
interfaces in strongly-correlated oxides investigated by means of
high-resolution electron microscopy, electron energy-loss spectroscopy,
electron holography, and DC electrical transport measurements. Focus
will be on the interfacial electronic structure and charge transfer that
are related atomic scale oxygen-hole depletion, valence-state variation,
chemical diffusion, and interfacial strain. Examples include
SrTiO3/RO/SrTiO3 (R=La, Pr, Nd, Sm, Y), Heusler alloy (Co2MnSi and
Co2FeSi)-SrTiO3 and YBa2Cu3O7-x-Pr0.68Ca0.32MnO3 interfaces as well as
(LaMnO3)2n/(SrMnO3)n superlattices. The impact of interfacial charge
transfer on ferroelectric and ferromagnetic order, metal-insulator
transition, superconductivity and other magnetoelectric properties will
be discussed. The work was supported by US DOE/BES, under Contract No.
DE-AC02-98CH10886.

担当の連絡先:酒井朗(基礎工学研究科・システム創成専攻・電子光科学領域
内線 6300 sakai@ee.es.osaka-u.ac.jp)

PAGETOP