Effects of temperature dependent chemical potential on the Seebeck coefficient of TiS2 thermoelectric material

2011 ◽  
Vol 1314 ◽  
Author(s):  
Tsunehiro Takeuchi ◽  
Akio Yamamoto ◽  
Koto Ogawa
Keyword(s):  
High Resolution ◽  
Seebeck Coefficient ◽  
Temperature Dependence ◽  
Thermoelectric Material ◽  
Chemical Potential ◽  
Photoemission Spectroscopy ◽  
Temperature Dependent ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Guiding Principle ◽  
Effects Of Temperature

ABSTRACTThe relation between chemical potential and Seebeck coefficient was investigated by using high-resolution angle resolved photoemission spectroscopy. The temperature dependence of chemical potential was experimentally determined for the n-type TiS2 thermoelectric material and compared with the measured Seebeck coefficient. We found that the temperature dependence of chemical potential of TiS2 is significantly large, and its effect on Seebeck coefficient is not negligible. This fact strongly indicates that the temperature dependence of chemical potential has to be properly understood to construct the guiding principle for developing new, practical thermoelectric materials.

scholarly journals Momentum dependent $$d_{xz/yz}$$ band splitting in LaFeAsO

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
S. S. Huh ◽  
Y. S. Kim ◽  
W. S. Kyung ◽  
J. K. Jung ◽  
R. Kappenberger ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Nematic Phase ◽  
Photoemission Spectroscopy ◽  
Temperature Dependent ◽  
Band Shift ◽  
Iron Based Superconductors ◽  
Band Splitting ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Important Clue ◽  
Iron Based

Abstract The nematic phase in iron based superconductors (IBSs) has attracted attention with a notion that it may provide important clue to the superconductivity. A series of angle-resolved photoemission spectroscopy (ARPES) studies were performed to understand the origin of the nematic phase. However, there is lack of ARPES study on LaFeAsO nematic phase. Here, we report the results of ARPES studies of the nematic phase in LaFeAsO. Degeneracy breaking between the $$d_{xz}$$ d xz and $$d_{yz}$$ d yz hole bands near the $$\Gamma$$ Γ and M point is observed in the nematic phase. Different temperature dependent band splitting behaviors are observed at the $$\Gamma$$ Γ and M points. The energy of the band splitting near the M point decreases as the temperature decreases while it has little temperature dependence near the $$\Gamma$$ Γ point. The nematic nature of the band shift near the M point is confirmed through a detwin experiment using a piezo device. Since a momentum dependent splitting behavior has been observed in other iron based superconductors, our observation confirms that the behavior is a universal one among iron based superconductors.

Electronic structures of layered Ta2NiS5 single crystals revealed by high-resolution angle-resolved photoemission spectroscopy

2018 ◽  
Vol 6 (15) ◽  
pp. 3976-3981 ◽  
Author(s):  
Kejun Mu ◽  
Haiping Chen ◽  
Yuliang Li ◽  
Yingying Zhang ◽  
Pengdong Wang ◽  
...  
Keyword(s):  
High Resolution ◽  
Single Crystals ◽  
Electronic Structures ◽  
Photoemission Spectroscopy ◽  
One Dimensional ◽  
Angle Resolved Photoemission Spectroscopy

Using high-resolution angle-resolved photoemission spectroscopy (ARPES), we systematically studied the electronic structures of quasi-one-dimensional (1D) ternary material Ta2NiS5 single crystals.

scholarly journals A tunable low-energy photon source for high-resolution angle-resolved photoemission spectroscopy

2012 ◽  
Vol 83 (11) ◽  
pp. 113103 ◽  
Author(s):  
John W. Harter ◽  
Philip D. C. King ◽  
Eric J. Monkman ◽  
Daniel E. Shai ◽  
Yuefeng Nie ◽  
...  
Keyword(s):  
High Resolution ◽  
Low Energy ◽  
Photoemission Spectroscopy ◽  
Energy Photon ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Photon Source

scholarly journals Evidence of Electron-Hole Imbalance in WTe 2 from High-Resolution Angle-Resolved Photoemission Spectroscopy

2017 ◽  
Vol 34 (9) ◽  
pp. 097305 ◽  
Author(s):  
Chen-Lu Wang ◽  
Yan Zhang ◽  
Jian-Wei Huang ◽  
Guo-Dong Liu ◽  
Ai-Ji Liang ◽  
...  
Keyword(s):  
High Resolution ◽  
Photoemission Spectroscopy ◽  
Electron Hole ◽  
Angle Resolved Photoemission Spectroscopy
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