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Title: Thermoelectric power as a probe of density of states in correlated actinide materials: The case of PuCoGa 5 superconductor

We present measurements of the thermoelectric power of the plutonium-based unconventional superconductor PuCoGa 5. The data is interpreted within a phenomenological model for the quasiparticle density of states of intermediate valence systems and the results are compared with results obtained from photoemission spectroscopy. The results are consistent with intermediate valence nature of 5f-electrons, furthermore, we propose that measurements of the Seebeck coefficient can be used as a probe of density of states in this material, thereby providing a link between transport measurements and photoemission in strongly correlated materials. Here, we discuss these results and their implications for the electronic structure determination of other strongly correlated systems, especially nuclear materials.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  2. European Commission, Karlsruhe (Germany). Joint Research Centre, Inst. for Transuranium Elements
  3. Temple Univ., Philadelphia, PA (United States). Dept. of Physics
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
INL/JOU-16-39090; LA-UR-17-22208
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1702660
Grant/Contract Number:
AC07-05ID14517; FG02-01ER45872; AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 19; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Idaho National Lab. (INL), Idaho Falls, ID (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; superconductivity; thermoelectric power; Material Science
OSTI Identifier:
1369437
Alternate Identifier(s):
OSTI ID: 1331407; OSTI ID: 1415374