Polaritonic Probe of an Emergent 2D Dipole Interface.

Autor:	Rizzo DJ; Department of Physics, Columbia University, New York, New York 10027, United States., Zhang J; Theory Department, Max Planck Institute for Structure and Dynamics of Matter and Center for Free-Electron Laser Science, 22761 Hamburg, Germany., Jessen BS; Department of Physics, Columbia University, New York, New York 10027, United States., Ruta FL; Department of Physics, Columbia University, New York, New York 10027, United States.; Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States., Cothrine M; Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States., Yan J; Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States.; Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States., Mandrus DG; Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States.; Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States., Nagler SE; Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, United States., Taniguchi T; Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan., Watanabe K; Research Center for Electronic and Optical Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan., Fogler MM; Department of Physics, University of California San Diego, La Jolla, California 92093, United States., Pasupathy AN; Department of Physics, Columbia University, New York, New York 10027, United States., Millis AJ; Department of Physics, Columbia University, New York, New York 10027, United States.; Center for Computational Quantum Physics, Flatiron Institute, New York, New York 10010, United States., Rubio A; Theory Department, Max Planck Institute for Structure and Dynamics of Matter and Center for Free-Electron Laser Science, 22761 Hamburg, Germany.; Center for Computational Quantum Physics, Flatiron Institute, New York, New York 10010, United States.; Nano-Bio Spectroscopy Group, Universidad del País Vasco UPV/EHU, San Sebastián 20018, Spain., Hone JC; Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States., Dean CR; Department of Physics, Columbia University, New York, New York 10027, United States., Basov DN; Department of Physics, Columbia University, New York, New York 10027, United States.
Jazyk:	angličtina
Zdroj:	Nano letters [Nano Lett] 2023 Sep 27; Vol. 23 (18), pp. 8426-8435. Date of Electronic Publication: 2023 Jul 26.
DOI:	10.1021/acs.nanolett.3c01611
Abstrakt:	The use of work-function-mediated charge transfer has recently emerged as a reliable route toward nanoscale electrostatic control of individual atomic layers. Using α-RuCl 3 as a 2D electron acceptor, we are able to induce emergent nano-optical behavior in hexagonal boron nitride ( h BN) that arises due to interlayer charge polarization. Using scattering-type scanning near-field optical microscopy (s-SNOM), we find that a thin layer of α-RuCl 3 adjacent to an h BN slab reduces the propagation length of h BN phonon polaritons (PhPs) in significant excess of what can be attributed to intrinsic optical losses. Concomitant nano-optical spectroscopy experiments reveal a novel resonance that aligns energetically with the region of excess PhP losses. These experimental observations are elucidated by first-principles density-functional theory and near-field model calculations, which show that the formation of a large interfacial dipole suppresses out-of-plane PhP propagation. Our results demonstrate the potential utility of charge-transfer heterostructures for tailoring optoelectronic properties of 2D insulators.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu