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Temperature dependa...
Temperature dependance of Intrinsic Spin Orbit Coupling Gap in Graphene probed by Terahertz photoconductivity
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Maussang, K. (author)
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- Dinar, K. (author)
- Laboratoire Charles Coulomb
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- Bray, C. (author)
- Laboratoire Charles Coulomb
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- Consejo, C. (author)
- Laboratoire Charles Coulomb
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- Delgado-Notario, J. A. (author)
- Polish Academy of Sciences,Universidad de Salamanca,University of Salamanca
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- Krishtopenko, S. (author)
- Laboratoire Charles Coulomb
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- Yahniuk, I. (author)
- Universität Regensburg,University of Regensburg,Polish Academy of Sciences
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- Gerbert, S. (author)
- Laboratoire Charles Coulomb
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- Ruffenach, S. (author)
- Laboratoire Charles Coulomb
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- Moench, E. (author)
- Universität Regensburg,University of Regensburg
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- Indykiewicz, Kornelia (author)
- Politechnika Wrocławska,Wrocław University of Science and Technology
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- Benhamoumbui, B. (author)
- Laboratoire Charles Coulomb
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- Jouault, B. (author)
- Laboratoire Charles Coulomb
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Torres, J. (author)
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- Meziani, Y. M. (author)
- Universidad de Salamanca,University of Salamanca
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- Knap, W. (author)
- Laboratoire Charles Coulomb
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- Yurgens, Avgust, 1959 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Ganichev, S.D. (author)
- Universität Regensburg,University of Regensburg,Polish Academy of Sciences
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- Teppe, F. (author)
- Laboratoire Charles Coulomb
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz. - 2162-2027 .- 2162-2035.
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https://research.cha...
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https://doi.org/10.1...
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Abstract
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- Graphene is a quantum spin Hall insulator, with a nontrivial topological gap induced by the spin-orbit coupling. Such splitting is weak (∼ 45 μ eV) in the absence of external magnetic field. However, due to rather long spin-relaxation time, graphene is an attractive candidate for applications in quantum technologies. When it is encapsulated in hexagonal boron nitride, the coupling between graphene and the substrate compensates intrinsic spin-orbit coupling and decreases the nontrivial topological gap, which may lead to phase transition into a trivial band insulator state. In this work, we have measured experimentally the zero-field splittings in monolayer and bilayer graphene by the means of subterahertz photoconductivity-based electron spin resonance technique. The dependance in temperature of such splittings have been also studied in the 2-12K range. We observed a decrease of the spin splittings with increasing temperature. Such behavior might be understood from several physical mechanisms that could induce a temperature dependence of the spin-orbit coupling. These includes the difference in the expansion coefficients between the graphene and the boron nitride substrate or the metal contacts, the electronphonon interactions, and the presence of a magnetic order at low temperature.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publication and Content Type
- kon (subject category)
- ref (subject category)
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- By the author/editor
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Maussang, K.
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Dinar, K.
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Bray, C.
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Consejo, C.
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Delgado-Notario, ...
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Krishtopenko, S.
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show more...
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Yahniuk, I.
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Gerbert, S.
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Ruffenach, S.
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Moench, E.
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Indykiewicz, Kor ...
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Benhamoumbui, B.
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Jouault, B.
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Torres, J.
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Meziani, Y. M.
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Knap, W.
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Yurgens, Avgust, ...
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Ganichev, S.D.
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Teppe, F.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
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International Co ...
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Chalmers University of Technology