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Enhanced and tunable surface plasmons in two-dimensional<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Ti</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">C</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>stacks: Electronic structure versus boundary effects

Vincent MauchampInstitut Pprime, UPR 3346 CNRS-Université de Poitiers-ISAE-ENSMA, Boîte Postale 30179, 86962 Futuroscope-Chasseneuil Cedex, FranceMatthieu BugnetDepartment of Materials Science and Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1,CanadaEdson P. BellidoDepartment of Materials Science and Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1,CanadaG. A. BottonDepartment of Materials Science and Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1,CanadaPhilippe MoreauInstitut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS, 2 rue de la Houssinière, Boîte Postale 32229, 44322 Nantes Cedex 3, FranceDamien MagnéInstitut Pprime, UPR 3346 CNRS-Université de Poitiers-ISAE-ENSMA, Boîte Postale 30179, 86962 Futuroscope-Chasseneuil Cedex, FranceMichael NaguibDepartment of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USAThierry Cabioc’hInstitut Pprime, UPR 3346 CNRS-Université de Poitiers-ISAE-ENSMA, Boîte Postale 30179, 86962 Futuroscope-Chasseneuil Cedex, FranceMichel W. BarsoumDepartment of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA

2014lv

ABI

Annotatsiya

The dielectric response of two-dimensional (2D) ${\mathrm{Ti}}_{3}{\mathrm{C}}_{2}$ stacked sheets was investigated by high-resolution transmission electron energy-loss spectroscopy and ab initio calculations in the 0.2--30-eV energy range. Intense surface plasmons (SPs), evidenced at the nanometer scale at energies as low as 0.3 eV, are shown to be the dominant screening process up to at least 45-nm-thick stacks. This domination results from a combination of efficient free-electron dynamics, begrenzungs effect, and reduced interband damping. It is shown that, in principle, the SPs energies can be tuned in the mid-infrared, from 0.2 to 0.7 eV, by controlling the sheets' functionalization and/or thickness. This point evidences a new attribute of this new class of 2D materials.

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DOI: 10.1103/physrevb.89.235428

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