2026-06-29T18:21:31Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/80902023-11-23T01:05:28Zcom_10259.4_2527com_10259_5086com_10259_2604col_10259.4_2528
Fidelity as a marker of topological phase transitions in 2D Dirac materials
Bolívar, Juan Carlos
Cordero Tejedor, Nicolás A.
Nagy, Ágnes
Romera, Elvira
Bidimensional materials
Dirac equation
Silicene
Topological phases
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.
2023-11-22T13:23:38Z
2023-11-22T13:23:38Z
2018-09
info:eu-repo/semantics/article
0020-7608
http://hdl.handle.net/10259/8090
10.1002/qua.25674
1097-461X
eng
International Journal of Quantum Chemistry. 2018, V. 118, n. 17, e25674
https://doi.org/10.1002/qua.25674
info:eu-repo/grantAgreement/Junta de Andalucia//FQM.1861/
info:eu-repo/grantAgreement/Junta de Andalucia//FQM-381/
info:eu-repo/semantics/openAccess
Wiley