PHOTOEMISSION STUDY OF QUASI-ONE-DIMENSIONAL HALOGEN-BRIDGED COMPOUND[Ni(chxn)2Br]Br2

Shin-Ichi Fujimori, Akihiro Ino, Testuo Okane, Atsushi Fujimori, Kozo Okada, Toshio Manabe, Masahiro Yamashita, Hideo Kishida and Hiroshi Okamoto
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Shin-Ichi Fujimori: Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute, SPring-8, Mikazuki, Hyogo 679-5148, Japan
Akihiro Ino: Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute, SPring-8, Mikazuki, Hyogo 679-5148, Japan
Testuo Okane: Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute, SPring-8, Mikazuki, Hyogo 679-5148, Japan
Atsushi Fujimori: Synchrotron Radiation Research Center, Japan Atomic Energy Research Institute, SPring-8, Mikazuki, Hyogo 679-5148, Japan;
Kozo Okada: Department of Physics, Faculty of Science, Okayama University Tsushima-naka, Okayama 700-8530, Japan
Toshio Manabe: Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
Masahiro Yamashita: Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
Hideo Kishida: Department of Advanced Materials Science, Graduate School of Frontier Science, University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
Hiroshi Okamoto: Department of Advanced Materials Science, Graduate School of Frontier Science, University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan

Surface Review and Letters (SRL), 2002, vol. 09, issue 02, 1065-1069

Abstract: We report results of the angle-resolved photoemission experiments on a quasi-one-dimensional halogen-bridged complex[Ni(chxn)2Br]Br2(chxn= 1R,2R-cyclohexanediamine), which is a one-dimensional Heisenberg spin chain withS = 1/2andJ ~ 3600K. The expected two dispersions, originated with spin–charge separations as have been observed in other quasi-one-dimensional electron systems likeSr2CuO3, are not clearly observed in this compound. Instead, only one 'band" having about 0.5 eV energy dispersion is found in the half of the Brillouin zone.

Date: 2002
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DOI: 10.1142/S0218625X02003354

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