Enhanced thermoelectric power and electronic correlations in RuSe2
Source abstract
Abstract
We report the electronic structure, electric and thermal transport properties of Ru1−xIrxSe2 (x ≤ 0.2). RuSe2 is a semiconductor that crystallizes in a cubic pyrite unit cell. The Seebeck coefficient of RuSe2 exceeds −200 μV/K around 730 K. Ir substitution results in the suppression of the resistivity and the Seebeck coefficient, suggesting the removal of the peaks in density of states near the Fermi level. Ru0.8Ir0.2Se2 shows a semiconductor-metal crossover at about 30 K. The magnetic field restores the semiconducting behavior. Our results indicate the importance of the electronic correlations in enhanced thermoelectricity of RuSb2.
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Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Chalcogenide Semiconductor Thin Films · Magnetic and transport properties of perovskites and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Brookhaven National Laboratory 1 Condensed Matter Physics and Materials Science Department, , Upton, New York 11973, USA
Brookhaven National Laboratory 3 Photon Sciences Directorate, , Upton, New York 11973, USA
Columbia University 2 Department of Applied Physics and Applied Mathematics, , New York, New York 10027, USA
Funding
US DOE
References (51)
Show source-provided references
1. The best thermoelectric10.1073/pnas.93.15.7436 ↗
2. Complex thermoelectric materials10.1038/nmat2090 ↗
3. Convergence of electronic bands for high performance bulk thermoelectrics10.1038/nature09996 ↗
4. Cooling, heating, generating power and recovering waste heat with thermoelectric system10.1126/science.1158899 ↗
5. Enhancement of thermoelectric efficiency in PbTe by distorion of the electronic density of states10.1126/science.1159725 ↗
6. Resonant levels in bulk thermoelectric semiconductors10.1039/c1ee02612g ↗
7. Solid State Phys. · 1998 · 51 · 8110.1016/s0081-1947(08)60190-3 ↗
8. Giant thermo-electric power of dilute magnetic alloys10.1143/PTP.34.372 ↗
9. Thermoelectric materials: New approaches to an old problem10.1063/1.881752 ↗
10. Thermoelectric properties of RxCe1−xPd3 (R=Y, La0.5Y 0.5, Nd)10.1103/PhysRevB.55.1283 ↗
11. Thermoelectric properties of FeSi10.1016/0031-9163(65)90094-6 ↗
12. Thermoelectric properties of Co-, Ir-, and Os-doped FeSi alloys: Evidence for strong electron-phonon coupling10.1103/PhysRevB.83.125209 ↗
13. Signatures of elecronic correlations in iron silicide10.1073/pnas.1118371109 ↗
14. Thermoelectric properties of the doped Kondo insulator: NdxCe3−xPt3Sb410.1103/PhysRevB.58.16057 ↗
15. Anomalous transport properties of RFe4P12 (R = La, Ce, Pr, and Nd)10.1103/PhysRevB.62.15125 ↗
16. Colossal Seebeck coefficient in strongly correlated semiconductor FeSb210.1209/0295-5075/80/17008 ↗
17. FeSb2: Prototype of huge electron-diffusion thermoelectricity10.1103/PhysRevB.79.153308 ↗
18. Huge thermoelectric power factor: FeSb2 versus FeAs2 and RuSb210.1143/APEX.2.091102 ↗
19. Electronic thermoelectric power factor and metal-insulator transition in FeSb210.1103/PhysRevB.86.115121 ↗
20. Kondo insulator description of spin state transition in FeSb210.1103/PhysRevB.72.045103 ↗
21. Dramatic thermal conductivity reduction by nanostructures for large increase in thermoelectric figure-of-merit of FeSb210.1063/1.3651757 ↗
22. Enhancement of the thermoelectric properties in doped FeSb2 bulk crystals10.1063/1.4731251 ↗
23. Thermoelectric property enhancement by Cu nanoparticles in nanostructured FeSb210.1063/1.4808094 ↗
24. Experimental and theoretical investigations of strongly correlated FeSb2−xSnx10.1103/PhysRevB.74.205105 ↗
25. Narrow band gap and enhanced thermoelectricity in FeSb210.1039/b918909b ↗
26. Thermopower of correlated semiconductors: Application to FeAs2 and FeSb210.1103/PhysRevB.82.085104 ↗
27. Temperature dependence of the band gap of FeS210.1103/PhysRevB.19.6620 ↗
28. Iron disulfide for solar energy conversion10.1016/0927-0248(93)90095-K ↗
29. Preparation and electrical transport of pyrite (FeS2) single crystals10.1016/0925-8388(92)90260-G ↗
30. Transport properties of iron dichalcogenides FeX2 (X=S,Se and Te)10.1143/JPSJ.67.1352 ↗
31. Two-dimensional detector sotware: From real detector to idealised image of two-theta scan10.1080/08957959608201408 ↗
32. Line profiles of neutron powder-diffraction peaks for structure refinement10.1107/S0365110X67000234 ↗
33. A. C. Larson and R. B. Von Dreele, “General structure analysis system,” Report No. LAUR-86-748, Los Alamos National Laboratory, Los Alamos, NM 87545, 1987.
34. EXPGUI, a graphical user interface for GSAS10.1107/S0021889801002242 ↗
35. Structure refinement of pyrite-type ruthenium disulfide, RuS2, and ruthenium diselenide RuSe210.1107/S0108270190001925 ↗
36. Total-energy all-electron density functional method for bulk solids and surfaces10.1103/PhysRevB.26.4571 ↗
37. 2001
38. Generalized gradient approximation made simple10.1103/PhysRevLett.77.3865 ↗
39. Correlated evolution of colossal thermoelectric effect and Kondo insulating behavior10.1063/1.4833055 ↗
40. Metal-insulator transitions10.1103/RevModPhys.70.1039 ↗
41. Energy bands in TX2 compounds with pyrite, marcasite and arsenopyrite structures10.1016/0022-4596(72)90022-9 ↗
42. Bonding schemes for compounds with the pyrite, marcasite and arsenopyrite type structures10.3891/acta.chem.scand.24-2993 ↗
43. Anisotropy and large magnetoresistance in the narrow-gap semiconductor FeSb210.1103/PhysRevB.67.155205 ↗
44. Annealed ising bond-mixture on the pyrite lattices10.1143/PTP.67.434 ↗
45. Classical and quantum spin dynamics in the fcc antiferromagnet NiS2 with frustration10.1103/PhysRevB.68.094409 ↗
46. Thermoelectric power of single-orbital and two-orbital Hubbard models on triangular lattices10.1016/j.physb.2010.07.003 ↗
47. Entropy, frustration and large thermopower of doped Mott insulators on the fcc lattice10.1103/PhysRevB.87.035126 ↗
48. Enhanced thermoelectric performance of rough silicon nanowires10.1038/nature06381 ↗
49. High thermoelectric performance of nanostructured bismuth antimony telluride bulk alloys10.1126/science.1156446 ↗
50. Nanostructured thermoelectrics: The new paradigm10.1021/cm902195j ↗
51. Development of novel thermoelectric materials by reduction of lattice thermal conductivity10.1088/1468-6996/11/4/044306 ↗