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Marfoua B, Hong J. First-Principles Investigation of Simultaneous Thermoelectric Power Generation and Active Cooling in a Bifunctional Semimetal ZrSeTe Janus Structure. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:234. [PMID: 38276752 PMCID: PMC10818368 DOI: 10.3390/nano14020234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/11/2024] [Accepted: 01/16/2024] [Indexed: 01/27/2024]
Abstract
Traditional thermoelectric materials often face a trade-off between efficient power generation (high ZT) and cooling performance. Here, we explore the potential of achieving simultaneous thermoelectric power generation and cooling capability in the recently fabricated bulk ZrSeTe Janus structure using first-principles density functional theory (DFT). The layered ZrSeTe Janus structure exhibits a semimetal character with anisotropic transport properties along the in-plane and out-of-plane directions. Our DFT calculations, including the explicit calculation of relaxation time, reveal a maximum ZT of ~0.065 in the out-of-plane direction at 300 K which is one order of magnitude larger than that in the in-plane direction (ZT~0.006). Furthermore, the thermoelectric cooling performance is also investigated. The in-plane direction shows a cooling performance of 13 W/m·K and a coefficient of performance (COPmax) of ~90 with a temperature difference (ΔT) of 30 K, while the out-of-plane direction has a cooling performance of 2.5 W/m·K and COPmax of ~2.5. Thus, the out-of-plane current from the thermoelectric power generation can be utilized as an in-plane current source for active heat pumping. Consequently, we propose that the semimetal ZrSeTe Janus structure can display bifunctional thermoelectric properties for simultaneous thermoelectric power generation and active cooling.
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Affiliation(s)
| | - Jisang Hong
- Department of Physics, Pukyong National University, Busan 48513, Republic of Korea;
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Pan Y, Fan FR, Hong X, He B, Le C, Schnelle W, He Y, Imasato K, Borrmann H, Hess C, Büchner B, Sun Y, Fu C, Snyder GJ, Felser C. Thermoelectric Properties of Novel Semimetals: A Case Study of YbMnSb 2. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2003168. [PMID: 33296128 DOI: 10.1002/adma.202003168] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 10/09/2020] [Indexed: 06/12/2023]
Abstract
The emerging class of topological materials provides a platform to engineer exotic electronic structures for a variety of applications. As complex band structures and Fermi surfaces can directly benefit thermoelectric performance it is important to identify the role of featured topological bands in thermoelectrics particularly when there are coexisting classic regular bands. In this work, the contribution of Dirac bands to thermoelectric performance and their ability to concurrently achieve large thermopower and low resistivity in novel semimetals is investigated. By examining the YbMnSb2 nodal line semimetal as an example, the Dirac bands appear to provide a low resistivity along the direction in which they are highly dispersive. Moreover, because of the regular-band-provided density of states, a large Seebeck coefficient over 160 µV K-1 at 300 K is achieved in both directions, which is very high for a semimetal with high carrier concentration. The combined highly dispersive Dirac and regular bands lead to ten times increase in power factor, reaching a value of 2.1 mW m-1 K-2 at 300 K. The present work highlights the potential of such novel semimetals for unusual electronic transport properties and guides strategies towards high thermoelectric performance.
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Affiliation(s)
- Yu Pan
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Feng-Ren Fan
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Xiaochen Hong
- Leibniz-Institute for Solid State and Materials Research (IFW-Dresden), Helmholtzstraße 20, Dresden, 01069, Germany
| | - Bin He
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Congcong Le
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Walter Schnelle
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Yangkun He
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Kazuki Imasato
- Materials Science & Engineering (MSE), Northwestern University, Evanston, IL, 60208, USA
| | - Horst Borrmann
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Christian Hess
- Leibniz-Institute for Solid State and Materials Research (IFW-Dresden), Helmholtzstraße 20, Dresden, 01069, Germany
| | - Bernd Büchner
- Leibniz-Institute for Solid State and Materials Research (IFW-Dresden), Helmholtzstraße 20, Dresden, 01069, Germany
- Institute for Solid-State and Materials Physics, Technical University Dresden, Dresden, 01062, Germany
| | - Yan Sun
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - Chenguang Fu
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
| | - G Jeffrey Snyder
- Materials Science & Engineering (MSE), Northwestern University, Evanston, IL, 60208, USA
| | - Claudia Felser
- Department of Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany
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Mangelis P, Vaqueiro P, Powell AV. Improved Thermoelectric Performance through Double Substitution in Shandite-Type Mixed-Metal Sulfides. ACS APPLIED ENERGY MATERIALS 2020; 3:2168-2174. [PMID: 32226925 PMCID: PMC7093842 DOI: 10.1021/acsaem.9b02272] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 12/03/2019] [Indexed: 06/10/2023]
Abstract
Substitution of tin by indium in shandite-type phases, A3Sn2S2 with mixed Co/Fe occupancy of the A-sites is used to tune the Fermi level within a region of the density of states in which there are sharp, narrow bands of predominantly metal d-character. Materials of general formula Co2.5+x Fe0.5-x Sn2--yIn y S2 (x = 0, 0.167; 0.0 ≤ y ≤ 0.7) have been prepared by solid-state reaction and the products characterized by powder X-ray diffraction. Electrical-transport property data reveal that the progressive depopulation of the upper conduction band as tin is replaced by indium increases the electrical resistivity, and the weakly temperature-dependent ρ(T) becomes more semiconducting in character. Concomitant changes in the negative Seebeck coefficient, the temperature dependence of which becomes increasingly linear, suggests the more highly substituted materials are n-type degenerate semiconductors. The power factors of the substituted phases, while increased, exhibit a weak temperature dependence. The observed reductions in thermal conductivity are principally due to reductions in the charge-carrier contribution on hole doping. A maximum figure-of-merit of (ZT)max = 0.29 is obtained for the composition Co2.667Fe0.333Sn1.6In0.4S2 at 573 K: among the highest values for an n-type sulfide at this temperature.
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Geishendorf K, Vir P, Shekhar C, Felser C, Facio JI, van den Brink J, Nielsch K, Thomas A, Goennenwein STB. Signatures of the Magnetic Entropy in the Thermopower Signals in Nanoribbons of the Magnetic Weyl Semimetal Co 3Sn 2S 2. NANO LETTERS 2020; 20:300-305. [PMID: 31774686 DOI: 10.1021/acs.nanolett.9b03822] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Weyl semimetals exhibit interesting electronic properties due to their topological band structure. In particular, large anomalous Hall and anomalous Nernst signals are often reported, which allow for a detailed and quantitative study of subtle features. We pattern single crystals of the magnetic Weyl semimetal Co3Sn2S2 into nanoribbon devices using focused ion beam cutting and optical lithography. This approach enables a very precise study of the galvano- and thermomagnetic transport properties. Indeed, we found interesting features in the temperature dependency of the anomalous Hall and Nernst effects. We present an analysis of the data based on the Mott relation and identify in the Nernst response signatures of magnetic fluctuations enhancing the anomalous Nernst conductivity at the magnetic phase transition.
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Affiliation(s)
- Kevin Geishendorf
- Leibniz IFW Dresden , Helmholtzstr. 20 , G-01 069 Dresden , Germany
- Institute of Applied Physics , Technische Universität Dresden , 01062 Dresden , Germany
| | - Praveen Vir
- Max Planck Institute for Chemical Physics of Solids , 01187 Dresden , Germany
| | - Chandra Shekhar
- Max Planck Institute for Chemical Physics of Solids , 01187 Dresden , Germany
| | - Claudia Felser
- Max Planck Institute for Chemical Physics of Solids , 01187 Dresden , Germany
| | - Jorge I Facio
- Leibniz IFW Dresden , Helmholtzstr. 20 , G-01 069 Dresden , Germany
| | | | - Kornelius Nielsch
- Leibniz IFW Dresden , Helmholtzstr. 20 , G-01 069 Dresden , Germany
- Institute of Applied Physics , Technische Universität Dresden , 01062 Dresden , Germany
- Institute of Materials Science , Technische Universität Dresden , 01062 Dresden , Germany
| | - Andy Thomas
- Leibniz IFW Dresden , Helmholtzstr. 20 , G-01 069 Dresden , Germany
| | - Sebastian T B Goennenwein
- Institut für Festkörper- und Materialphysik , Technische Universität Dresden and Würzburg-Dresden Cluster of Excellence ct.qmat , 01062 Dresden , Germany
- Center for Transport and Devices of Emergent Materials , Technische Universität Dresden , 01062 Dresden , Germany
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Martinelli A, Lepore GO, Bernardini F, Giaccherini A, Di Benedetto F. The puzzling structure of Cu 5FeS 4 (bornite) at low temperature. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2018; 74:405-415. [PMID: 30297546 DOI: 10.1107/s2052520618009812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 07/09/2018] [Indexed: 06/08/2023]
Abstract
The crystal structure of Cu5FeS4 (bornite) has been investigated using synchrotron X-ray powder diffraction at temperatures between 10 and 275 K. Diffraction data confirm that bornite crystallizes in the orthorhombic space group Pbca at 275 K. The unit-cell volume decreases continuously on cooling, but undergoes an abrupt contraction below ∼65 K, where a first-order Pbca→Pca21 structural transition takes place. The primary active mode yielding the observed ordered structure corresponds to the irreducible representation Γ2-, with wavevector (0,0,0). Pair distribution function analysis shows strong discrepancies between the local and the average structure. The average Fe-S bond length obtained through the EXAFS local probe is consistent with the values independently provided by X-ray powder diffraction data, strongly supporting the preferred location of Fe.
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Affiliation(s)
| | | | - Fabio Bernardini
- Department of Physics, University of Cagliari, Cittadella Universitaria, Monserrato, I-09042 Italy
| | - Andrea Giaccherini
- Department of Earth Sciences, University of Florence, Via La Pira 4, Firenze, 50121, Italy
| | - Francesco Di Benedetto
- Department of Earth Sciences, University of Florence, Via La Pira 4, Firenze, 50121, Italy
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