2026-06-29T22:59:38Zhttps://riubu.ubu.es/oai/request

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

00925njm 22002777a 4500 dc Bolívar, Juan Carlos author Cordero Tejedor, Nicolás A. author Nagy, Ágnes author Romera, Elvira author 2018-09 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. 0020-7608 http://hdl.handle.net/10259/8090 10.1002/qua.25674 1097-461X Bidimensional materials Dirac equation Silicene Topological phases Fidelity as a marker of topological phase transitions in 2D Dirac materials