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Title: Large thermopower from dressed quasiparticles in the layered cobaltates and rhodates

Abstract

The origin of the large thermopower in Na x CoO2 is complicated by correlation phenomena. To disentangle the effects from multiple interactions, we use angle-resolved photoemission to study Kx RhO2, an isostructural analogy of NaxCoO2 with large thermopower and weak electron correlation. In using the experimentally measured electronic structure, we demonstrate that the thermopower in KxRhO2 can be quantitatively explained within the quasiparticle framework after including an electron-phonon mass enhancement effect. Extending the analysis to the cobaltate, we find the doubling in thermopower is well accounted for by additional band renormalization from electron correlation. Thus, the large thermopower emerges from the itinerant quasiparticles dressed by hierarchical electron-phonon and electron-electron interactions.

Authors:
 [1];  [1];  [2];  [3];  [4];  [5];  [5];  [6];  [5];  [7];  [8];  [8];  [4];  [9]
+ Show Author Affiliations
  1. Stanford Univ., CA (United States). Dept. of Applied Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Sciences (SIMES)
  2. Stanford Univ., CA (United States). Dept. of Physics
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Sciences (SIMES); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource
  5. Nanjing Univ. (China). National Lab. of Solid State Microstructure, Dept. of Materials Science and Engineering
  6. Nanjing Univ. (China). National Lab. of Solid State Microstructure, Dept. of Physics
  7. Nanjing Univ. (China). National Lab. of Solid State Microstructure, Collaborative Innovation Center of Advanced Microstructures
  8. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
  9. Stanford Univ., CA (United States). Dept. of Applied Physics, Dept. of Physics; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Institute for Materials and Energy Sciences (SIMES)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
OSTI Identifier:
1390319
Alternate Identifier(s):
OSTI ID: 1375080; OSTI ID: 1417604
Grant/Contract Number:  
AC02-05CH11231; AC02-76SF00515; 11374149; 11574131; 91622122
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 8; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Chen, Su-Di, He, Yu, Zong, Alfred, Zhang, Yan, Hashimoto, Makoto, Zhang, Bin-Bin, Yao, Shu-Hua, Chen, Yan-Bin, Zhou, Jian, Chen, Yan-Feng, Mo, Sung-Kwan, Hussain, Zahid, Lu, Donghui, and Shen, Zhi-Xun. Large thermopower from dressed quasiparticles in the layered cobaltates and rhodates. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.081109.
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Chen, Su-Di, He, Yu, Zong, Alfred, Zhang, Yan, Hashimoto, Makoto, Zhang, Bin-Bin, Yao, Shu-Hua, Chen, Yan-Bin, Zhou, Jian, Chen, Yan-Feng, Mo, Sung-Kwan, Hussain, Zahid, Lu, Donghui, & Shen, Zhi-Xun. Large thermopower from dressed quasiparticles in the layered cobaltates and rhodates. United States. https://doi.org/10.1103/PhysRevB.96.081109
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Chen, Su-Di, He, Yu, Zong, Alfred, Zhang, Yan, Hashimoto, Makoto, Zhang, Bin-Bin, Yao, Shu-Hua, Chen, Yan-Bin, Zhou, Jian, Chen, Yan-Feng, Mo, Sung-Kwan, Hussain, Zahid, Lu, Donghui, and Shen, Zhi-Xun. Tue . "Large thermopower from dressed quasiparticles in the layered cobaltates and rhodates". United States. https://doi.org/10.1103/PhysRevB.96.081109. https://www.osti.gov/servlets/purl/1390319.
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@article{osti_1390319,
title = {Large thermopower from dressed quasiparticles in the layered cobaltates and rhodates},
author = {Chen, Su-Di and He, Yu and Zong, Alfred and Zhang, Yan and Hashimoto, Makoto and Zhang, Bin-Bin and Yao, Shu-Hua and Chen, Yan-Bin and Zhou, Jian and Chen, Yan-Feng and Mo, Sung-Kwan and Hussain, Zahid and Lu, Donghui and Shen, Zhi-Xun},
abstractNote = {The origin of the large thermopower in Na x CoO2 is complicated by correlation phenomena. To disentangle the effects from multiple interactions, we use angle-resolved photoemission to study Kx RhO2, an isostructural analogy of NaxCoO2 with large thermopower and weak electron correlation. In using the experimentally measured electronic structure, we demonstrate that the thermopower in KxRhO2 can be quantitatively explained within the quasiparticle framework after including an electron-phonon mass enhancement effect. Extending the analysis to the cobaltate, we find the doubling in thermopower is well accounted for by additional band renormalization from electron correlation. Thus, the large thermopower emerges from the itinerant quasiparticles dressed by hierarchical electron-phonon and electron-electron interactions.},
doi = {10.1103/PhysRevB.96.081109},
journal = {Physical Review B},
number = 8,
volume = 96,
place = {United States},
year = {Tue Aug 15 00:00:00 EDT 2017},
month = {Tue Aug 15 00:00:00 EDT 2017}
}
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Journal Article:
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https://doi.org/10.1103/PhysRevB.96.081109
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Works referenced in this record:

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Dynamical Mean Field Theory of an Effective Three-Band Model for Na x CoO 2
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ARPES on Na 0.6 CoO 2 : Fermi Surface and Unusual Band Dispersion
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Fermi Surface and Quasiparticle Dynamics of Na 0.7 CoO 2 Investigated by Angle-Resolved Photoemission Spectroscopy
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Energy Band Structure of Copper
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“Pudding Mold” Band Drives Large Thermopower in Na x CoO 2
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    Enhanced Seebeck coefficient by a filling-induced Lifshitz transition in K x RhO 2
    journal, January 2019

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