2026-06-29T22:11:05Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/91842024-05-27T07:09:17Zcom_10259.4_2527com_10259_5086com_10259_2604col_10259.4_2528

Mayorgas, Alberto Calixto, Manuel Cordero Tejedor, Nicolás A. Romera, Elvira Castaños Garza, Octavio Héctor 2024-05-25T15:15:55Z 2024-05-25T15:15:55Z 2024-05-13 2666-9366 http://hdl.handle.net/10259/9184 10.21468/SciPostPhysCore.7.2.029 2666-9366 The time evolution of a wave packet is a tool to detect topological phase transitions in two-dimensional Dirac materials, such as graphene and silicene. Here we extend the analysis to HgTe/CdTe quantum wells and study the evolution of their electron current wave packet, using 2D effective Dirac Hamiltonians and different layer thicknesses. We show that the two different periodicities that appear in this temporal evolution reach a minimum near the critical thickness, where the system goes from normal to inverted regime. Moreover, the maximum of the electron current amplitude changes with the layer thickness, identifying that current maxima reach their higher value at the critical thickness. Thus, we can characterize the topological phase transitions in terms of the periodicity and amplitude of the electron currents. We thank the support of Spanish MICIU through the project PID2022- 138144NB-I00. AM thanks the Spanish MIU for the FPU19/06376 predoctoral fellowship. OC is on sabbatical leave at Granada University, Spain, since the 1st of September 2023. OC thanks support from the program PASPA from DGAPA-UNAM. eng SciPost Foundation SciPost Physics Core. 2024, V. 7, n. 2, p. 1-18 https://scipost.org/SciPostPhysCore.7.2.029 Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Física Materiales Physics Materials Quantum revivals in HgTe/CdTe quantum wells and topological phase transitions info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion SciPost Physics Core 7 2 1 18