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

Abstract

We have studied the electronic structure of SnSe and Na-doped SnSe bymeans 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.

Authors:
 [1];  [1];  [1];  [2];  [3];  [3];  [3];  [4];  [4];  [4]
+ Show Author Affiliations
  1. Waseda Univ., Shinjuku (Japan). Department of Applied Physics
  2. University of Roma “La Sapienza” (Italy). Department of Physics
  3. Hiroshima University (Japan). Hiroshima Synchrotron Radiation Center
  4. Northwestern Univ., Evanston, IL (United States). Department of Chemistry
Publication Date:
Research Org.:
Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1429263
Alternate Identifier(s):
OSTI ID: 1429142; OSTI ID: 1775427
Grant/Contract Number:  
SC0014520
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 12; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Electronic structure; Thermoelectric effects; Semiconductor compounds; Angle-resolved photoemission spectroscopy

Citation Formats

Maeda, M., Yamamoto, K., Mizokawa, T., Saini, N. L., Arita, M., Namatame, H., Taniguchi, M., Tan, G., Zhao, L. D., and Kanatzidis, M. G. Unusually large chemical potential shift in a degenerate semiconductor: Angle-resolved photoemission study of SnSe and Na-doped SnSe. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.97.121110.
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Maeda, M., Yamamoto, K., Mizokawa, T., 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. United States. https://doi.org/10.1103/PhysRevB.97.121110
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Maeda, M., Yamamoto, K., Mizokawa, T., Saini, N. L., Arita, M., Namatame, H., Taniguchi, M., Tan, G., Zhao, L. D., and Kanatzidis, M. G. Fri . "Unusually large chemical potential shift in a degenerate semiconductor: Angle-resolved photoemission study of SnSe and Na-doped SnSe". United States. https://doi.org/10.1103/PhysRevB.97.121110. https://www.osti.gov/servlets/purl/1429263.
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@article{osti_1429263,
title = {Unusually large chemical potential shift in a degenerate semiconductor: Angle-resolved photoemission study of SnSe and Na-doped SnSe},
author = {Maeda, M. and Yamamoto, K. and Mizokawa, T. and Saini, N. L. and Arita, M. and Namatame, H. and Taniguchi, M. and Tan, G. and Zhao, L. D. and Kanatzidis, M. G.},
abstractNote = {We have studied the electronic structure of SnSe and Na-doped SnSe bymeans 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.},
doi = {10.1103/PhysRevB.97.121110},
journal = {Physical Review B},
number = 12,
volume = 97,
place = {United States},
year = {Fri Mar 23 00:00:00 EDT 2018},
month = {Fri Mar 23 00:00:00 EDT 2018}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevB.97.121110
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Cited by: 15 works
Citation information provided by
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Figures / Tables:

FIG. 1 FIG. 1: (Color online) (a) Crystal structure of SnSe created by VESTA [10]. (b) Photoemission intensity map in the ky-kz plane at 0.195 eV for Na-doped SnSe. ky and kz are wave numbers along the $Γ$-Y and $Γ$-Z directions corresponding to the b-axis and c-axis directions, respectively.
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Works referenced in this record:

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    Works referencing / citing this record:

    High‐Performance Thermoelectric SnSe: Aqueous Synthesis, Innovations, and Challenges
    journal, February 2020

    Investigation of the electronic structure and lattice dynamics of the thermoelectric material Na-doped SnSe
    journal, September 2018

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      Figures / Tables found in this record:

      FIG. 1 (p. 2)figure
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      FIG. 3: (p. 4)figure
      FIG. 4: (p. 5)figure
      FIG. 5: (p. 7)figure
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