Massless Fermions in Organic Conductor(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
- 論文の詳細を見る
The electronic states in two-dimensional organic conductor α-(BEDT-TTF)_2I_3 have been investigated to show the noticeable property of the massless fermions, i.e., the linear dispersion which exists on the contact point between the conduction band and the valence band. These fermions are well known in bismuth and graphite, where the former are described by the Dirac equation and the latter obeys the Weyl equation corresponding to the massless fermion. In the present study, we show that the effective Hamiltonian describing the massless fermions in α-(BEDT-TTF)_2I_3 contains intrinsically new terms of Pauli matrices σ_z and σ_o in addition to the Weyl equation which consists of σ_x and σ_y. The new massless fermions are robust against the charge disproportionation, and induce the anomalous momentumdependence in the charge density.
- 社団法人日本物理学会の論文
- 2007-03-15
著者
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FUKUYAMA Hidetoshi
Department of Applied Physics, Tokyo University of Science
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Fujiwara H
Department Of Chemistry Graduate School Of Science Osaka Prefecture University And Crest Jst
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Suzumura Y
名古屋大 大学院理学研究科
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SUZUMURA Yoshikazu
Department of Physics, Nagoya University
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Kobayashi A
Institute For Advanced Research Nagoya University
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Kobayashi A
Department Of Physics Division Of Material Science Nagoya University
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Kobayashi Akito
Department Of Physics Nagoya University
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KATAYAMA Shinya
Department of Physical Electronics, Tokyo Institute of Technology
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Fukuyama Hidetoshi
Department Of Chemistry Graduate School Of Science Osaka Prefecture University And Crest Jst
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Fujiwara Hideki
Department Of Organic And Polymeric Materials Faculty Of Engineering Tokyo Institute Of Technology
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Katayama Shinya
Department Of Physics Nagoya University
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Katayama Shinya
Department Of Physical Electronics Tokyo Institute Of Technology:(present Address)nippon Sheet Glass
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KOBAYASHI Akito
Institute for Advanced Research, Nagoya University
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Fukuyama Hidetoshi
Department Of Applied Physics Faculty Of Science Tokyo University Of Science
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Fukuyama Hidetoshi
Department Of Chemistry Graduate School Of Science Osaka Prefecture University
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Suzumura Yoshikazu
Department Of Physics Nagoya University
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Suzumura Yoshikazu
Department Of Physics Faculty Of Science Tohoku University
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Kobayashi Akito
Institute For Advanced Research Nagoya University:department Of Physics Nagoya University
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Fukuyama Hidetoshi
Department of Applied Physics and Research Institute for Science and Technology, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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