ANTEZZA Mauro
Fonction : EnseignantChercheur
Organisme : Université Montpellier
Maître de Conférences
(HDR)
mauro.antezza
umontpellier.fr
0467143829
Bureau: 31.0, Etg: 2, Bât: 21  Site : Campus Triolet
Administration Nationale: Elu/nommé au comité national CNRS
 Elu/nommé au CS/CSD CNRS ou IRD
 Expert ANR
 Élu au Bureau de l'IUF  Ministère ENESR

Administration Locale: Membre d'un pool d'experts
 Direction d'équipe
 Responsable de formations

Curriculum Vitae: 
'10today : associate prof., University of Montpellier '07'10 : postdoc, École Normale Supérieure  Paris '06'07 : postdoc, University of Trento '03'06 : PhD (physics), University of Trento '99'03 : Laurea (physics), University of Pavia 
Activités de Recherche: 
Ultracold Quantum Gases, CasimirLifshitz Interaction, Nonequilibrium Systems, RadiationMatter Interaction, Disordered Systems 
Domaines de Recherche:  Physique/Physique Quantique
 Physique/Matière Condensée/Gaz Quantiques
 Physique/Physique/Agrégats Moléculaires et Atomiques
 Physique/Physique/Physique Atomique
 Physique/Physique/Optique

Dernieres productions scientifiques :


Hybridization of topological surface states with a flat band
Auteur(s): Krishtopenko S., Antezza M., Teppe F.
(Article) Publié:
Journal Of Physics: Condensed Matter, vol. 32 p.165501 (2020)
Texte intégral en Openaccess :
Ref HAL: hal02447824_v1
DOI: 10.1088/1361648X/ab6741
Exporter : BibTex  endNote
Résumé: We address the problem of hybridization between topological surface states and a nontopological flat bulk band. Our model, being a mixture of threedimensional Bernevig–Hughes–Zhang and twodimensional pseudospin1 Hamiltonian, allows explicit treatment of the topological surface state evolution by continuously changing the hybridization between the inverted bands and an additional ‘parasitic’ flat band in the bulk. We show that the hybridization with a flat band lying below the edge of the conduction band converts the initial Diraclike surface states into a branch below and one above the flat band. Our results univocally demonstrate that the upper branch of the topological surface states is formed by Dyakonov–Khaetskii surface states, known for HgTe since the 1980s. Additionally we explore an evolution of the surface states and the arising of Fermi arcs in Dirac semimetals when the flat band crosses the conduction band.



Giant Casimir Torque between Rotated Gratings and the θ = 0 Anomaly
Auteur(s): Antezza M., Chan Ho bun, Guizal B., Marachevskii V., Messina R., Wang Mingkang
(Article) Publié:
Physical Review Letters, vol. 124 p.013903 (2020)
Ref HAL: hal02431447_v1
DOI: 10.1103/PhysRevLett.124.013903
Exporter : BibTex  endNote
Résumé: We study the Casimir torque between two metallic onedimensional gratings rotated by an angle θ with respect to each other. We find that, for infinitely extended gratings, the Casimir energy is anomalously discontinuous at θ 1⁄4 0, due to a critical zeroorder geometric transition between a 2D and a 1Dperiodic system. This transition is a peculiarity of the grating geometry and does not exist for intrinsically anisotropic materials. As a remarkable practical consequence, for finitesize gratings, the torque per area can reach extremely large values, increasing without bounds with the size of the system. We show that for finite gratings with only ten period repetitions, the maximum torque is already 60 times larger than the one predicted in the case of infinite gratings. These findings pave the way to the design of a contactless quantum vacuum torsional spring, with possible relevance to micro and nanomechanical devices.



Magnetictunable nanoscale thermal radiation between twisted graphene gratings
Auteur(s): He Mingjian, Qi Hong, Ren Yatao, Zhao Yijun, Antezza M.
(Article) Publié:
International Journal Of Heat And Mass Transfer, vol. 150 p.119305 (2020)
Ref HAL: hal02431405_v1
DOI: 10.1016/j.ijheatmasstransfer.2020.119305
Exporter : BibTex  endNote
Résumé: In this paper, magnetoplasmonic manipulation of nearfield radiative heat transfer (NFRHT) is realized using two twisted graphene gratings. As a result of the quantum Hall regime of magnetooptical graphene and the grating effect, three types of graphene surface plasmon polaritons (SPPs) modes are observed in the system: nearzero modes, highfrequency hyperbolic modes, and elliptic modes. The elliptic SPPs modes, which are caused by the combined effect of magnetic field and grating, are observed in the graphene grating system for the first time. In addition, the nearzero modes can be greatly enhanced by the combined effect grating and magnetic field, rendering graphene devices promising for thermal communication at ultralow frequency. In particular, the nearzero modes result in a unique enhancement region of heat transfer, no matter for any twisted angle between gratings. The combined effect of grating and magnetic field is investigated simultaneously. By changing the strength of magnetic field, the positions and intensities of the modes can be modulated, and hence the NFRHT can be tuned accordingly, no matter for parallel or twisted graphene gratings. The magnetic field endows the grating action (graphene filling factors and twisted angles) with a higher modulation ability to modulate the NFRHT compared with zerofield. Moreover, the modulation ability of twist can be tuned by the magnetic field at different twisted angles. In sum, the combined effect of magnetic field and grating provides a tunable way to realize the energy modulation or multifrequency thermal communications related to graphene devices.



Graphenebased thermal repeater
Auteur(s): He Mingjian, Qi Hong, Ren Yatao, Zhao Yijun, Antezza M.
(Article) Publié:
Applied Physics Letters, vol. 115 p.263101 (2019)
Texte intégral en Openaccess :
Ref HAL: hal02424284_v1
DOI: 10.1063/1.5132995
Exporter : BibTex  endNote
Résumé: In this Letter, we have demonstrated the possibility to efficiently relay the radiative heat flux between two nanoparticles by opening a smooth channel for heat transfer. By coating the nanoparticles with a silica shell and modifying the substrate with multilayered graphene sheets, respectively, the localized phonon polaritons excited near the nanoparticles can couple with the multiple surface plasmon polaritons near the substrate to realize the heat relay at a long distance. The heat transfer can be enhanced by more than six orders of magnitude, and the relay distance can be as high as 35 times in the farfield regime. This work may provide a way to realize the energy modulation or thermal communications especially at long distances.



Giant resonant radiative heat transfer between nanoparticles
Auteur(s): Zhang Yong, Yi Hingliang, Tan Heping, Antezza M.
(Article) Publié:
Physical Review B, vol. 100 p.134305 (2019)
Texte intégral en Openaccess :
Ref HAL: hal02317225_v1
DOI: 10.1103/PhysRevB.100.134305
Exporter : BibTex  endNote
Résumé: Nearfield radiative heat transfer exhibits various effects, such as amplification due to the geometry of the system. In this work, we construct a periodic layered structure which consists of multiple layers of alternating materials. Radiative heat transfer (RHT) between nanoparticles placed on each side of an intermediate structure is studied. Thermal energy exchange between nanoparticles is assisted by transmitted evanescent fields, which is theoretically included in the system's Green's function. We show that the resulting heat transfer with the assistance of a multilayered structure is more than five orders of magnitude higher than that in the absence of the multilayered structure at the same interparticle distance. This increase is observed over a broad range of distances ranging from near to far field. This is due to the fact that the intermediate multilayered structure supports hyperbolic phonon polaritons, where the edge frequencies of the typeI and typeII reststrahlen bands coincide at a value that is approximately equal to the nanoparticle resonance. This allows highk evanescent modes to resonate with the nanoparticles. The effects of the number of layers and fill factor in the multilayered structure on RHT are examined. Finally, we show that when there is a lateral distance between the two particles assisted by the interference of surface waves, RHT conductance exhibits an oscillating and nonmonotonic behavior with respect to the lateral distance between nanoparticles. These results illustrate a powerful method for regulating energy transport in particle systems and can be relevant for effective energy management at nanomicro scales.

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