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oai:riubu.ubu.es:10259/80902023-11-23T01:05:28Zcom_10259.4_2527com_10259_5086com_10259_2604col_10259.4_2528

2023-11-22T13:23:38Z urn:hdl:10259/8090 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