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Ishii H, Kobayashi N, Hirose K. Order- Ncalculations for thermoelectric power factor based on linear response theory. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:335903. [PMID: 38729207 DOI: 10.1088/1361-648x/ad4a15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Accepted: 05/10/2024] [Indexed: 05/12/2024]
Abstract
We present an order-Nquantum transport calculation methodology to evaluate thermoelectric transport coefficients, such as electric conductivity and Seebeck coefficient. Different from a conventional method using the electric conductivity spectrum, it obtains the coefficients directly from the correlation function between heat and electric current based on linear response theory. As an example, we apply the methodology to a two-dimensional square-lattice model with static disorder and confirm that the calculated results are consistent with those obtained by the conventional method. The proposed methodology provides an effective approach to evaluate the thermoelectric performance of micron-scale materials based on quantum mechanics from an atomistic viewpoint.
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Affiliation(s)
- Hiroyuki Ishii
- Department of Applied Physics, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Nobuhiko Kobayashi
- Department of Applied Physics, Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan
| | - Kenji Hirose
- Smart Energy Research Laboratories, NEC Corporation, 34 Miyukigaoka, Tsukuba, Ibaraki 305-8501, Japan
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Serhiienko I, Novitskii A, Garmroudi F, Kolesnikov E, Chernyshova E, Sviridova T, Bogach A, Voronin A, Nguyen HD, Kawamoto N, Bauer E, Khovaylo V, Mori T. Record-High Thermoelectric Performance in Al-Doped ZnO via Anderson Localization of Band Edge States. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2309291. [PMID: 38704699 DOI: 10.1002/advs.202309291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 03/06/2024] [Indexed: 05/07/2024]
Abstract
Oxides are of interest for thermoelectrics due to their high thermal stability, chemical inertness, low cost, and eco-friendly constituting elements. Here, adopting a unique synthesis route via chemical co-precipitation at strongly alkaline conditions, one of the highest thermoelectric performances for ZnO ceramics (P F max = $PF_{\text{max}} =$ 21.5 µW cm-1 K-2 andz T max = $zT_{\text{max}} =$ 0.5 at 1100 K inZn 0.96 Al 0.04 O ${\rm Zn}_{0.96} {\rm Al}_{0.04}{\rm O}$ ) is achieved. These results are linked to a distinct modification of the electronic structure: charge carriers become trapped at the edge of the conduction band due to Anderson localization, evidenced by an anomalously low carrier mobility, and characteristic temperature and doping dependencies of charge transport. The bi-dimensional optimization of doping and carrier localization enable a simultaneous improvement of the Seebeck coefficient and electrical conductivity, opening a novel pathway to advance ZnO thermoelectrics.
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Affiliation(s)
- Illia Serhiienko
- WPI-MANA, National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, 305-0044, Japan
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8573, Japan
| | - Andrei Novitskii
- WPI-MANA, National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, 305-0044, Japan
| | - Fabian Garmroudi
- Institute of Solid State Physics, TU Wien, Vienna, A-1040, Austria
| | - Evgeny Kolesnikov
- National University of Science and Technology MISIS, Moscow, 119049, Russia
| | | | - Tatyana Sviridova
- National University of Science and Technology MISIS, Moscow, 119049, Russia
| | - Aleksei Bogach
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, 119991, Russia
| | - Andrei Voronin
- National University of Science and Technology MISIS, Moscow, 119049, Russia
| | - Hieu Duy Nguyen
- Center for Basic Research on Materials (CBRM), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, 305-0044, Japan
| | - Naoyuki Kawamoto
- Center for Basic Research on Materials (CBRM), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, 305-0044, Japan
| | - Ernst Bauer
- Institute of Solid State Physics, TU Wien, Vienna, A-1040, Austria
| | - Vladimir Khovaylo
- National University of Science and Technology MISIS, Moscow, 119049, Russia
- Belgorod State University, Belgorod, 308015, Russia
| | - Takao Mori
- WPI-MANA, National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, 305-0044, Japan
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8573, Japan
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Górnicka K, Gui X, Chamorro JR, McQueen TM, Cava RJ, Klimczuk T, Winiarski MJ. Superconductivity-Electron Count Relationship in Heusler Phases-the Case of LiPd 2Si. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2024; 36:1870-1879. [PMID: 38435048 PMCID: PMC10902818 DOI: 10.1021/acs.chemmater.3c02398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 01/30/2024] [Accepted: 01/31/2024] [Indexed: 03/05/2024]
Abstract
We report superconductivity in the full Heusler compound LiPd2Si (space group Fm3̅m, No. 225) at a critical temperature of Tc = 1.3 K and a normalized heat capacity jump at Tc, ΔC/γTc = 1.1. The low-temperature isothermal magnetization curves imply type-I superconductivity, as previously observed in LiPd2Ge. We show, based on density functional theory calculations and using the molecular orbital theory approach, that while LiPd2Si and LiPd2Ge share the Pd cubic cage motif that is found in most of the reported Heusler superconductors, they show distinctive features in the electronic structure. This is due to the fact that Li occupies the site which, in other compounds, is filled with an early transition metal or a rare-earth metal. Thus, while a simple valence electron count-property relationship is useful in predicting and tuning Heusler materials, inclusion of the symmetry of interacting frontier orbitals is also necessary for the best understanding.
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Affiliation(s)
- Karolina Górnicka
- Faculty
of Applied Physics and Mathematics and Advanced Materials Centre, Gdansk University of Technology, ul. Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Xin Gui
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08540, United States
| | - Juan R. Chamorro
- Materials
Department and Materials Research Laboratory, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Tyrel M. McQueen
- Department
of Chemistry, William H. Miller III Department of Physics and Astronomy,
Department of Materials Science and Engineering, and Institute for
Quantum Matter, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Robert J. Cava
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08540, United States
| | - Tomasz Klimczuk
- Faculty
of Applied Physics and Mathematics and Advanced Materials Centre, Gdansk University of Technology, ul. Narutowicza 11/12, 80-233 Gdańsk, Poland
| | - Michał J. Winiarski
- Faculty
of Applied Physics and Mathematics and Advanced Materials Centre, Gdansk University of Technology, ul. Narutowicza 11/12, 80-233 Gdańsk, Poland
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Meilakhs AP. Electronic Kapitza conductance and related kinetic coefficients at an interface between n-type semiconductors. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 36:045302. [PMID: 37793408 DOI: 10.1088/1361-648x/ad0014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 10/04/2023] [Indexed: 10/06/2023]
Abstract
We calculate the Kapitza conductance, which is the proportionality coefficient between heat flux and temperature jump at the interface, for the case of two conducting solids separated by the interface. We show that for conducting solids in a non-equilibrium state, there should also arise the electrochemical potential jump at the interface. Hence to describe linear transport at the interface we need three kinetic coefficients: interfacial analogs of electric and heat conductances and interfacial analog of the Seebeck coefficient. We calculate these coefficients for the case of an interface between n-type semiconductors. We perform calculations in the framework of Boltzmann transport theory. We have found out that the interfacial analog of the Seebeck coefficient for some range of parameters of the considered semiconductors, has a high value of about 10-3V K-1. Thus this effect has the potential to be used for the synthesis of effective thermoelectric materials.
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Affiliation(s)
- A P Meilakhs
- DFMC, Centro Atomico Constituyentes, CNEA, Av. Gral. Paz 1499, San Martin, Buenos Aires 1650, Argentina
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Hamadani BH. 2.11 - Accurate characterization of indoor photovoltaic performance. JPHYS MATERIALS 2023; 6:10.1088/2515-7639/acc550. [PMID: 37965623 PMCID: PMC10644663 DOI: 10.1088/2515-7639/acc550] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
Abstract
Ambient energy harvesting has great potential to contribute to sustainable development and address growing environmental challenges. Converting waste energy from energy-intensive processes and systems (e.g. combustion engines and furnaces) is crucial to reducing their environmental impact and achieving net-zero emissions. Compact energy harvesters will also be key to powering the exponentially growing smart devices ecosystem that is part of the Internet of Things, thus enabling futuristic applications that can improve our quality of life (e.g. smart homes, smart cities, smart manufacturing, and smart healthcare). To achieve these goals, innovative materials are needed to efficiently convert ambient energy into electricity through various physical mechanisms, such as the photovoltaic effect, thermoelectricity, piezoelectricity, triboelectricity, and radiofrequency wireless power transfer. By bringing together the perspectives of experts in various types of energy harvesting materials, this Roadmap provides extensive insights into recent advances and present challenges in the field. Additionally, the Roadmap analyses the key performance metrics of these technologies in relation to their ultimate energy conversion limits. Building on these insights, the Roadmap outlines promising directions for future research to fully harness the potential of energy harvesting materials for green energy anytime, anywhere.
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