Journal ArticleDOI
Surface phononic graphene.
Si-Yuan Yu,Xiaochen Sun,Xu Ni,Qing Wang,Xue-Jun Yan,Cheng He,Xiaoping Liu,Liang Feng,Ming-Hui Lu,Yan-Feng Chen +9 more
TLDR
The demonstrated fully integrated artificial phononic graphene platform here constitutes a step towards on-chip quantum simulators of graphene and unique monolithic electro-acoustic integrated circuits.Abstract:
Strategic manipulation of wave and particle transport in various media is the key driving force for modern information processing and communication. In a strongly scattering medium, waves and particles exhibit versatile transport characteristics such as localization, tunnelling with exponential decay, ballistic, and diffusion behaviours due to dynamical multiple scattering from strong scatters or impurities. Recent investigations of graphene have offered a unique approach, from a quantum point of view, to design the dispersion of electrons on demand, enabling relativistic massless Dirac quasiparticles, and thus inducing low-loss transport either ballistically or diffusively. Here, we report an experimental demonstration of an artificial phononic graphene tailored for surface phonons on a LiNbO3 integrated platform. The system exhibits Dirac quasiparticle-like transport, that is, pseudo-diffusion at the Dirac point, which gives rise to a thickness-independent temporal beating for transmitted pulses, an analogue of Zitterbewegung effects. The demonstrated fully integrated artificial phononic graphene platform here constitutes a step towards on-chip quantum simulators of graphene and unique monolithic electro-acoustic integrated circuits.read more
Citations
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Journal ArticleDOI
Topological phases in acoustic and mechanical systems
TL;DR: In this paper, the essential physical concepts that underpin various classes of topological phenomena realized in acoustic and mechanical systems are introduced, including Dirac points, the quantum Hall, quantum spin Hall and valley Hall effects, Floquet topological phases, 3D gapless states and Weyl crystals.
Journal ArticleDOI
Artificial gauge fields in materials and engineered systems
Monika Aidelsburger,Monika Aidelsburger,Monika Aidelsburger,Sylvain Nascimbene,Nathan Goldman +4 more
TL;DR: In this paper, the authors present a review of various forms of artificial electromagnetic fields and spin-orbit couplings for matter and light and connect different communities, by revealing explicit links between the diverse forms and realizations of artificial gauge fields.
Journal ArticleDOI
Breaking the barriers: advances in acoustic functional materials
TL;DR: In this article, the authors present a review of recent developments in the field of acoustic metamaterials, including zero/negative refraction, subwavelength imaging, sound cloaking, total sound absorption, metasurface and phase engineering, Dirac physics and topology-inspired acoustic engineering, non-Hermitian parity-time synthetic active active metammaterials, and one-way propagation of sound waves.
Journal ArticleDOI
Electrical tuning of elastic wave propagation in nanomechanical lattices at MHz frequencies.
Jinwoong Cha,Chiara Daraio +1 more
TL;DR: One-dimensional, non-linear, nanoelectromechanical lattices (NEML) with active control of the frequency band dispersion in the radio-frequency domain (10–30 MHz), inspired by NEMS-based phonon waveguides, and includes the voltage-induced frequency tuning of the individual resonators.
Journal ArticleDOI
Physics of surface vibrational resonances: pillared phononic crystals, metamaterials, and metasurfaces.
Yabin Jin,Yan Pennec,Bernard Bonello,Hossein Honarvar,Leonard Dobrzynski,Bahram Djafari-Rouhani,Mahmoud I. Hussein +6 more
TL;DR: The history and development of pillared materials are overviewed, a detailed synopsis of a selection of key research topics that involve the utilization of pillars or similar branching substructures in different contexts are provided, and some perspectives on the state of the field are provided.
References
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Journal ArticleDOI
Acoustic topological insulator and robust one-way sound transport
TL;DR: In this article, the acoustic analogue of a topological insulator is shown: a metamaterial exhibiting one-way sound transport along its edge, a graphene-like array of stainless-steel rods.
Journal ArticleDOI
Dirac cones induced by accidental degeneracy in photonic crystals and zero-refractive-index materials
TL;DR: This work shows that by employing accidental degeneracy, dielectric photonic crystals can be designed and fabricated that exhibit Dirac cone dispersion at the centre of the Brillouin zone at a finite frequency and numerically and experimentally demonstrates in the microwave regime that these crystals manipulate waves as if they had near-zero refractive indices at and near the Dirac point frequency.
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Quantum simulation of the Dirac equation
Rene Gerritsma,Rene Gerritsma,Gerhard Kirchmair,Gerhard Kirchmair,F. Zähringer,F. Zähringer,Enrique Solano,Enrique Solano,Rainer Blatt,Rainer Blatt,Christian F. Roos,Christian F. Roos +11 more
TL;DR: A proof-of-principle quantum simulation of the one-dimensional Dirac equation using a single trapped ion set to behave as a free relativistic quantum particle and study Zitterbewegung for different initial superpositions of positive- and negative-energy spinor states.
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Sub-Poissonian Shot Noise in Graphene
TL;DR: It is found that the minimum conductivity of order e2/h at the Dirac point (when the electron and hole excitations are degenerate) is associated with a maximum of the Fano factor (the ratio of noise power and mean current).
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Creating, moving and merging Dirac points with a Fermi gas in a tunable honeycomb lattice
TL;DR: In this paper, the authors exploit the unique tunability of a honeycomb optical lattice to adjust the effective mass of the Dirac fermions by breaking inversion symmetry and changing the lattice anisotropy.