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Title: Transmission in a Fano-Anderson chain with a topological defect
Authors: Nehra, Ritu
Ramachandran, Ajith
Wuster, Sebastian
Sharma, Auditya
Issue Date: Apr-2021
Publisher: American Physical Society
Citation: Physical Review B, 2021, Vol.103, p155111
Abstract: The Fano-Anderson chain consists of a linear lattice with a discrete side-unit, and it exhibits Fano-resonant scattering due to coupling between the discrete states of the side-unit and the tight-binding continuum. We study Fano-resonance-assisted transport for the case of a topologically nontrivial side unit. We find that the topology of the side-unit influences the transmission characteristics, which thus can be an effective detection tool of the topological phases of the side unit. Furthermore, we explore the role of dual links between the linear tight-binding chain and the side unit. The secondary connection between the main chain and the side-unit can modify the position or width of the Fano resonance dip in the transmission probability, and thus can yield additional control.
Description: Open Access
ISSN: 2469-9950
2469-9969 (Online)
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Copyright: 2021 American Physical Society
Appears in Collections:Research Papers (TP)

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