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Bulk-Sensitive Photoemission Spectroscopy of TlFe2Se2

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, , Citation Y Nishitani et al 2012 J. Phys.: Conf. Ser. 391 012115 DOI 10.1088/1742-6596/391/1/012115

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1 Graduate School of Natural Science, Konan University, Kobe 658-8501, Japan

2 Faculty of Science and Engineering, Konan University, Kobe 658-8501, Japan

3 Industrial Technology Center of Wakayama Prefecture, Wakayama 649-6261, Japan

4 The Institute of Scientific and Industrial Research (ISIR), Osaka University, ibaraki, Osaka 567-0047, Japan

5 Japan Synchrotron Research Institute (JASRI), Sayo, Hyogo 679-5198, Japan

6 Faculty of Science and Engineering, Chuo University, Tokyo 112-8551, Japan

7 National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8568, Japan

8 Department of Applied Physics, Tokyo University of Science, Tokyo 162-8601, Japan

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1742-6596/391/1/012115

Abstract

We have investigated the electronic structures of the parent compound of an iron chalcogenide superconductor TlFe2Se2 by bulk-sensitive photoemission spectroscopy (PES). Valence-band PES demonstrates the energy gap opening at the Fermi level due to the shift of Fe 3d state to the higher binding energy side as compared to the calculated density of states, being consistent with the insulating behaviour in transport measurements.

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10.1088/1742-6596/391/1/012115