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8 papers · 2 filters
STM/S Observations of Graphene on SiC(0001) Etched by H-plasma
André E. B. Amend, Tomohiro Matsui, Hiroki Hibino +1
Monolayer graphene epitaxially grown on SiC(0001) was etched by H-plasma and studied by scanning tunneling microscopy and spectroscopy. The etching created partly hexagonal nanopit…
Pulse-width modulated oscillations in a nonlinear resonator under two-tone driving as a means for MEMS sensor readout
Samer Houri, Ryuichi Ohta, Motoki Asano +2
A MEMS Duffing resonator is driven by two adjacent frequency tones into the nonlinear regime. We show that if the two-tone drive is applied at a frequency where a bistable response…
Electrostatically induced phononic crystal
Daiki Hatanaka, Adrian Bachtold, Hiroshi Yamaguchi
The possibility of realizing an electrostatically induced phononic crystal is investigated numerically in an acoustic waveguide based on a graphene sheet that is suspended over per…
Energy relaxation in hot electron quantum optics via acoustic and optical phonon emission
Clive Emary, Lewis A. Clark, Masaya Kataoka +1
We study theoretically the relaxation of hot quantum-Hall edge-channel electrons under the emission of both acoustic and optical phonons. Aiming to model recent experiments with si…
Signatures of a non-thermal metastable state in copropagating quantum Hall edge channels
Kosuke Itoh, Ryo Nakazawa, Tomoaki Ota +3
A Tomonaga-Luttinger (TL) liquid is known as an integrable system, in which a non-equilibrium many-body state survives without relaxing to a thermalized state. This intriguing char…
Massive Dirac Fermions Signal in Raman Spectrum of Graphene
Ken-ichi Sasaki
Massless Dirac fermions in graphene can acquire a mass through different kinds of sublattice-symmetry-breaking perturbations, and there is a growing need to determine this mass usi…