This work would not have been possible without the support from my family and friends. A special thanks to Julia for correcting my grammar.I'd like to thank Prof. Luis Gregório Dias for not only taking me as his student during these two years, but also for introducing me to this exciting and lively field of topological materials. I extend this thanks to Bruna, João, Marcos, Raphael and Vinícius, for all the helpful discussions and conversations.I'd also like to thank Prof. Annica Black-Schaffer for welcoming me into her research group during my exchange program to Uppsala University, as well as Jorge Cayao and Oladunjoye Awoga, for mentoring me during that period. This work would not have been possible without their help.