RT info:eu-repo/semantics/article
T1 Fidelity as a marker of topological phase transitions in 2D Dirac materials
A1 Bolívar, Juan Carlos
A1 Cordero Tejedor, Nicolás A.
A1 Nagy, Ágnes
A1 Romera, Elvira
K1 Bidimensional materials
K1 Dirac equation
K1 Silicene
K1 Topological phases
K1 Física
K1 Physics
K1 Química
K1 Chemistry
AB Silicene, as other 2D buckled structures, is a gapped Dirac material with intrinsic spin-orbit coupling whose band structure can be controlled by applying a perpendicular electric field. It presents a topological phase transition from a topological insulator to a band insulator at the charge neutrality point. We present in this article a characterization of this phase transition by using fidelity of Loschmidt echoes when a magnetic and two slightly different electric fields are applied by considering the time evolution of two kinds of wave packets, one with a single Gaussian profile and the other with a double Gaussian profile creating a cat state. We also show that Zitterbewegung, classical, and revival Loschmidt periods diverge close to but not exactly at the charge neutrality point and explain this behavior.
PB Wiley
SN 0020-7608
YR 2018
FD 2018-09
LK http://hdl.handle.net/10259/8090
UL http://hdl.handle.net/10259/8090
LA eng
NO This research was supported by the Junta de Andalucía projects FQM.1861 and FQM-381, the EU-funded Hungarian grant EFOP-3.6.2-16-2017-00005 and the National Research, Development and Innovation Fund of Hungary, financed under 123988 funding scheme.
DS Repositorio Institucional de la Universidad de Burgos
RD 04-dic-2024