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Thermodefect voltag...
Thermodefect voltage in graphene nanoribbon junctions
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- Aydin, Alhun (författare)
- Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA.
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- Sisman, Altug, Visiting Professor (författare)
- Uppsala universitet,Materialteori
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- Fransson, Jonas, 1970- (författare)
- Uppsala universitet,Materialteori,Materialfysik
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- Black-Schaffer, Annica M. (författare)
- Uppsala universitet,Materialteori
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- Dutta, Paramita (författare)
- Uppsala universitet,Materialteori,Phys Res Lab, Theoret Phys Div, Ahmadabad 380009, Gujarat, India.;Birla Inst Technol & Sci Pilani, Dept Phys, Pilani 333031, Rajasthan, India.
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Harvard Univ, Dept Chem & Chem Biol, Cambridge, MA 02138 USA Materialteori (creator_code:org_t)
- Institute of Physics Publishing (IOPP), 2022
- 2022
- Engelska.
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Ingår i: Journal of Physics. - : Institute of Physics Publishing (IOPP). - 0953-8984 .- 1361-648X. ; 34:19
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Thermoelectric junctions are often made of components of different materials characterized by distinct transport properties. Single material junctions, with the same type of charge carriers, have also been considered to investigate various classical and quantum effects on the thermoelectric properties of nanostructured materials. We here introduce the concept of defect-induced thermoelectric voltage, namely, thermodefect voltage, in graphene nanoribbon (GNR) junctions under a temperature gradient. Our thermodefect junction is formed by two GNRs with identical properties except the existence of defects in one of the nanoribbons. At room temperature the thermodefect voltage is highly sensitive to the types of defects, their locations, as well as the width and edge configurations of the GNRs. We computationally demonstrate that the thermodefect voltage can be as high as 1.7 mV K-1 for 555-777 defects in semiconducting armchair GNRs. We further investigate the Seebeck coefficient, electrical conductance, and electronic thermal conductance, and also the power factor of the individual junction components to explain the thermodefect effect. Taken together, our study presents a new pathway to enhance the thermoelectric properties of nanomaterials.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- thermoelectricity
- graphene
- defect
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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