FI: EMERGENT WEYL NODES AND FERMI ARCS IN A FLOQUET WEYL SEMIMETAL 
 ELENCO COMPLETO 

DATA: 10-05-2017

SEZIONE DI FIRENZE
Seminario teorico di Leda Bucciantini (Max Planck, Dresda) Abstract: When a Dirac semimetal is subject to a circularly polarized laser, it is predicted that the Dirac cone splits into two Weyl nodes and a non-equilibrium transient state called the Floquet Weyl semimetal is realized. We focus on the previously unexplored low frequency regime, where the upper and lower Dirac bands resonantly couples with each other through multi-photon processes, which is a realistic situation in solid state ultrafast pump-probe experiments. We find a series of new Weyl nodes emerging in pairs when the Floquet replica bands hybridize with each other. The nature of the Floquet Weyl semimetal with regard to the number, locations, and monopole charges of these Weyl nodes is highly tunable with the amplitude and frequency of the light. We derive an effective low energy theory using Brillouin-Wigner expansion and further regularise the theory on a cubic lattice. The monopole charges obtained from the low-energy Hamiltonian can be reconciled with the number of Fermi arcs on the lattice which we find numerically.


 SITO COLLEGATO 

 EVENTI RECENTI 
21-06-2018: KLEVER: An experiment to measure BR(KL -> pi0 nu anti-nu) at the CERN SPS
21-06-2018: R. Vaglio, HTS Superconductors for the Beam Impedance Mitigation in CERN Future Circular Collider
20-06-2018: F.L. Villante (Università dell'Aquila e INFN-LNGS)- The physics of the Sun and Solar Neutrinos
20-06-2018: Visita studenti - PhD School “The Dark Side of the Universe”
19-06-2018: Visita gruppo studenti del South Dakota nell'ambito del programma Davis-Bahcall
18-06-2018: Corsi di alta formazione per l'orientamento agli studi post-diploma 18-29 giugno 2018
18-06-2018: Stage Estivo
18-06-2018: Y. Nagai, Quality control tests of 99Mo/99mTc and 67Cu produced using accelerator neutrons for domestic use
18-06-2018: Euclid space mission: shedding light on dark energy and dark matter
18-06-2018: Visita studenti Summer School in Fisica e Tecnologie Nucleari (Ferrara)

[Back]

 

 

 

Istituto Nazionale di Fisica Nucleare - Piazza dei Caprettari, 70 - 00186 Roma
tel. +39 066840031 - fax +39 0668307924 - email: presidenza@presid.infn.it

F.M. F.E.