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Article Dans Une Revue Physical Review B Année : 2024

Disorder-induced topological phase transition in a driven Majorana chain

Résumé

We study a periodically driven one-dimensional Kitaev model in the presence of disorder. In the clean limit our model exhibits four topological phases corresponding to the existence or nonexistence of edge modes at zero and π quasienergy. When potential disorder is added, the system parameters get renormalized and the system may exhibit a topological phase transition. When starting from the Majorana π mode (MPM) phase, which hosts only edge Majoranas with quasienergy π, disorder induces a transition into a neighboring phase with both π and zero modes on the edges. We characterize the disordered system using (i) exact diagonalization, (ii) Arnoldi mapping onto an effective tight-binding chain, and (iii) topological entanglement entropy.

Dates et versions

hal-04559384 , version 1 (25-04-2024)

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Henry Ling, Philip Richard, Saeed Rahmanian Koshkaki, Michael Kolodrubetz, Dganit Meidan, et al.. Disorder-induced topological phase transition in a driven Majorana chain. Physical Review B, 2024, 109 (15), pp.155144. ⟨10.1103/PhysRevB.109.155144⟩. ⟨hal-04559384⟩
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