6 papers
Disorder-robust trivial Majorana-like states from smooth confinement in chiral superconducting nanowires
Eslam Ahmed, Jorge Cayao, Yukio Tanaka
Near-zero-energy states in Majorana nanowires can arise from topologically trivial mechanisms such as smooth spatial inhomogeneity and disorder, making zero-energy pinning alone in…
Universal Transport Theory for Paired Fractional Quantum Hall States in the Quantum Point Contact Geometry
Eslam Ahmed, Ryoi Ohashi, Hiroki Isobe +2
Even-denominator fractional quantum Hall (FQH) states can be viewed as topological superconductors of composite fermions, supporting a charged chiral mode and …
Floquet engineering spin triplet states in unconventional magnets
Pei-Hao Fu, Sayan Mondal, Jun-Feng Liu +2
We consider unconventional magnets with and without spin-singlet -wave superconductivity and demonstrate the emergence of spin triplet states due to light drives. In particular,…
Anomalous proximity effect under Andreev and Majorana bound states
Eslam Ahmed, Yukio Tanaka, Jorge Cayao
We theoretically study the anomalous proximity effect in a ballistic normal metal/diffusive normal metal/superconductor junction based on Rashba semiconductor nanowire model. The s…
Odd-frequency pairing due to Majorana and trivial Andreev bound states
Eslam Ahmed, Shun Tamura, Yukio Tanaka +1
Majorana and trivial Andreev bound states are predicted to appear in superconductor-semiconductor hybrid systems, but their identification is still a challenging task. Here we cons…
Odd-frequency superconducting pairing due to multiple Majorana edge modes in driven topological superconductors
Eslam Ahmed, Shun Tamura, Yukio Tanaka +1
Majorana zero modes have been shown to be the simplest quasiparticles exhibiting pure odd-frequency pairing, an effect that has so far been theoretically established in the static…