Unusually large chemical potential shift in a degenerate semiconductor: Angle-resolved photoemission study of SnSe and Na-doped SnSe

M. Maeda, K. Yamamoto, Takashi Mizokawa, N. L. Saini, M. Arita, H. Namatame, M. Taniguchi, G. Tan, L. D. Zhao, M. G. Kanatzidis

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    We have studied the electronic structure of SnSe and Na-doped SnSe by means of angle-resolved photoemission spectroscopy. The valence-band top reaches the Fermi level by the Na doping, indicating that Na-doped SnSe can be viewed as a degenerate semiconductor. However, in the Na-doped system, the chemical potential shift with temperature is unexpectedly large and is apparently inconsistent with the degenerate semiconductor picture. The large chemical potential shift and anomalous spectral shape are key ingredients for an understanding of the novel metallic state with the large thermoelectric performance in Na-doped SnSe.

    Original languageEnglish
    Article number121110
    JournalPhysical Review B
    Volume97
    Issue number12
    DOIs
    Publication statusPublished - 2018 Mar 23

    Fingerprint

    Chemical potential
    Photoemission
    photoelectric emission
    Semiconductor materials
    shift
    Photoelectron spectroscopy
    Valence bands
    Fermi level
    ingredients
    Electronic structure
    Doping (additives)
    electronic structure
    valence
    spectroscopy
    Temperature
    temperature

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

    Cite this

    Unusually large chemical potential shift in a degenerate semiconductor : Angle-resolved photoemission study of SnSe and Na-doped SnSe. / Maeda, M.; Yamamoto, K.; Mizokawa, Takashi; Saini, N. L.; Arita, M.; Namatame, H.; Taniguchi, M.; Tan, G.; Zhao, L. D.; Kanatzidis, M. G.

    In: Physical Review B, Vol. 97, No. 12, 121110, 23.03.2018.

    Research output: Contribution to journalArticle

    Maeda, M, Yamamoto, K, Mizokawa, T, Saini, NL, Arita, M, Namatame, H, Taniguchi, M, Tan, G, Zhao, LD & Kanatzidis, MG 2018, 'Unusually large chemical potential shift in a degenerate semiconductor: Angle-resolved photoemission study of SnSe and Na-doped SnSe', Physical Review B, vol. 97, no. 12, 121110. https://doi.org/10.1103/PhysRevB.97.121110
    Maeda, M. ; Yamamoto, K. ; Mizokawa, Takashi ; Saini, N. L. ; Arita, M. ; Namatame, H. ; Taniguchi, M. ; Tan, G. ; Zhao, L. D. ; Kanatzidis, M. G. / Unusually large chemical potential shift in a degenerate semiconductor : Angle-resolved photoemission study of SnSe and Na-doped SnSe. In: Physical Review B. 2018 ; Vol. 97, No. 12.
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    abstract = "We have studied the electronic structure of SnSe and Na-doped SnSe by means of angle-resolved photoemission spectroscopy. The valence-band top reaches the Fermi level by the Na doping, indicating that Na-doped SnSe can be viewed as a degenerate semiconductor. However, in the Na-doped system, the chemical potential shift with temperature is unexpectedly large and is apparently inconsistent with the degenerate semiconductor picture. The large chemical potential shift and anomalous spectral shape are key ingredients for an understanding of the novel metallic state with the large thermoelectric performance in Na-doped SnSe.",
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    AU - Maeda, M.

    AU - Yamamoto, K.

    AU - Mizokawa, Takashi

    AU - Saini, N. L.

    AU - Arita, M.

    AU - Namatame, H.

    AU - Taniguchi, M.

    AU - Tan, G.

    AU - Zhao, L. D.

    AU - Kanatzidis, M. G.

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