Staff directory
Pablo Matías Pérez Piskunow
Senior Postdoctoral Researcher
pablo.piskunow(ELIMINAR)@icn2.cat
Theoretical and Computational Nanoscience - Physics and Engineering of Nanodevices
- ORCID: 0000-0002-5607-2076
Publications
2020
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Computation of topological phase diagram of disordered Pb1-xSnxTe using the kernel polynomial method
Dániel Varjas, Michel Fruchart, Anton R. Akhmerov, Pablo M. Perez-Piskunow Physical Review Research; 2 (13229) 2020. 10.1103/PhysRevResearch.2.013229 .
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.