14th CEMS Colloquium

講演者

賀川 史敬 (創発物性科学研究センター 動的創発物性研究ユニット ユニットリーダー)

日程

2014年2月5日(水) 17:30～18:30

開催場所

理化学研究所　大河内記念ホール

講演タイトル

メゾスコピックな不均一から生じる創発現象

講演概要

Crystalline states are comprised of a periodic arrangement of atoms or molecules, and therefore the emergent electronic/magnetic phases are reasonably expected to be spatially homogeneous. However, crystal imperfections that inevitably exist in real materials often result in mesoscopic inhomogeneities, such as multidomain states and/or electronic inhomogeneities. Such inhomogeneities potentially host additional emergent phenomena that are absent from homogeneous systems, thereby raising a possibility for a new arena of fundamental science and applications. In this colloquium, I will address several emergent phenomena from mesoscopic inhomogeneities, such as (i) giant magnetocapacitance effect arising from multiferroic domain walls, (ii) charge-cluster glass in an organic conductor with triangular lattice, (iii) polarization switching ability dependent on multidomain topology in a uniaxial organic ferroelectric.