Computation of topological phase diagram of disordered Pb1-x Snx Te using the kernel polynomial method

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Computation of topological phase diagram of disordered Pb1-x Snx Te using the kernel polynomial method
Varjas, Dániel (Delft University of Technology. Kavli Institute of Nanoscience)
Fruchart, Michel (University of Chicago. James Franck Institute and Department of Physics)
Akhmerov, Anton R. (Delft University of Technology. Kavli Institute of Nanoscience)
Perez-Piskunow, Pablo M.

(Institut Català de Nanociència i Nanotecnologia)

Data:	2020
Resum:	We present an algorithm to determine topological invariants of inhomogeneous systems, such as alloys, disordered crystals, or amorphous systems. Based on the kernel polynomial method, our algorithm allows us to study samples with more than 107 degrees of freedom. Our method enables the study of large complex compounds, where disorder is inherent to the system. We use it to analyze Pb1-xSnxTe and tighten the critical concentration for the phase transition. Moreover, we obtain the topological phase diagram for related alloys in the family of three-dimensional mirror Chern insulators.
Ajuts:	European Commission 638760 European Commission 824140
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Amorphous systems ; Complex compounds ; Critical concentration ; Disordered crystals ; Inhomogeneous system ; Polynomial methods ; Topological invariants ; Topological phase
Publicat a:	Physical Review Research, Vol. 2, Issue 1 (February-April 2020) , art. 13229, ISSN 2643-1564

11 p, 967.8 KB

Registre creat el 2021-12-20, darrera modificació el 2022-12-12