130 citations · 330 across the 19 of their papers we have counts for
19 papers
Nonlocal Majorana polarization in non-Hermitian topological superconductors
Arjun S. Kumar, Jorge Cayao, Oladunjoye A. Awoga
The nonlocal Majorana polarization, defined as the product of the expectation values of the particle-hole operator at opposite halves of the system, has been shown to be a reliable…
Detection of spin- and valley-polarized states in van der Waals materials via thermoelectric and non-reciprocal transport
Oladunjoye A. Awoga, Pauli Virtanen, Tero T. Heikkilä +1
We predict thermoelectric and current rectification effects in hybrid junctions formed by Ising superconductors and materials hosting valley-polarized states. Both effects originat…
Identifying trivial and Majorana zero-energy modes using the Majorana polarization
Oladunjoye A. Awoga, Jorge Cayao
In this work we consider superconductor-semiconductor hybrids containing both trivial and Majorana zero modes and explore their signatures in the Majorana polarization. In particul…
Topological superconductivity in Fibonacci quasicrystals
Aksel Kobiałka, Oladunjoye A. Awoga, Martin Leijnse +3
We investigate the properties of a Fibonacci quasicrystal (QC) arrangement of a one-dimensional topological superconductor, such as a magnetic atom chain deposited on a superconduc…
Josephson effect in a Fibonacci quasicrystal
Anna Sandberg, Oladunjoye A. Awoga, Annica M. Black-Schaffer +1
Quasiperiodicity has recently been proposed to enhance superconductivity and its proximity effect. At the same time, there has been significant experimental progress in the fabrica…
Controlling Majorana hybridization in magnetic chain-superconductor systems
Oladunjoye A. Awoga, Ioannis Ioannidis, Archana Mishra +3
We propose controlling the hybridization between Majorana zero modes at the ends of magnetic adatom chains on superconductors by an additional magnetic adatom deposited close by. B…
Superconductivity in twisted bilayer graphene: possible pairing symmetries, impurity-induced states and Chern number
Emile Pangburn, Miguel Alvarado, Oladunjoye A. Awoga +2
We consider the most energetically favorable symmetry-allowed spin-singlet and spin-triplet superconducting pairing symmetries in twisted bilayer graphene at the magic angle, whose…
Superconductivity and magnetism in the surface states of ABC-stacked multilayer graphene
Oladunjoye A. Awoga, Tomas Löthman, Annica M. Black-Schaffer
ABC-stacked multilayer graphene (ABC-MLG) exhibits topological surface flat bands with a divergent density of states, leading to many-body instabilities at charge neutrality. Here,…
Superconductivity in monolayer and few-layer graphene: III Impurity-induced subgap states and quasi-particle interference patterns
Emile Pangburn, Louis Haurie, Adeline Crépieux +5
We consider the most energetically favorable symmetry-allowed spin-singlet and spin-triplet superconducting pairing symmetries in monolayer and few-layer graphene, and for each cal…
Superconductivity in monolayer and few-layer graphene: I. Review of possible pairing symmetries and basic electronic properties
Emile Pangburn, Louis Haurie, Adeline Crépieux +4
We review all symmetry-allowed spin-singlet and spin-triplet superconducting (SC) order parameters in graphene (-wave, -wave, -wave, and -wave) generated by generic ons…
Mitigating disorder-induced zero-energy states in weakly-coupled semiconductor-superconductor hybrid systems
Oladunjoye A. Awoga, Martin Leijnse, Annica M. Black-Schaffer +1
Disorder has appeared as one of the main mechanisms to induce topologically trivial zero-energy states in superconductor-semiconductor systems, thereby challenging the detection of…
Superconductivity in monolayer and few-layer graphene: II. Topological edge states and Chern numbers
Adeline Crépieux, Emile Pangburn, Louis Haurie +5
We study the emergence of electronic edge states in superconducting (SC) monolayer, bilayer, and trilayer graphene for both spin-singlet and spin-triplet SC order parameters. We fo…
Robust topological superconductivity in weakly coupled nanowire-superconductor hybrid structures
Oladunjoye A. Awoga, Jorge Cayao, Annica M. Black-Schaffer
We investigate the role of the coupling between a spin-orbit coupled semiconductor nanowire and a conventional -wave superconductor on the emergence of the topological supercond…
Supercurrent detection of topologically trivial zero-energy states in nanowire junctions
Oladunjoye A. Awoga, Jorge Cayao, Annica M. Black-Schaffer
We report the emergence of zero-energy states in the trivial phase of a short nanowire junction with strong spin-orbit coupling and magnetic field, formed by strong coupling betwee…
Probing unconventional superconductivity in proximitized graphene by impurity scattering
Oladunjoye A. Awoga, Annica M. Black-Schaffer
We demonstrate how potential impurities are a very powerful tool for determining the pairing symmetry in graphene proximity-coupled to a spin-singlet superconductor. All d-wave sta…
Domain walls in a chiral d-wave superconductor on the honeycomb lattice
Oladunjoye A. Awoga, Adrien Bouhon, Annica M. Black-Schaffer
We perform a fully self-consistent study of domain walls between different chiral domains in chiral $d_{x^2-y^2} \pm id_{xy}-wave superconductors with an underlying honeycomb latti…
Disorder robustness and protection of Majorana bound states in ferromagnetic chains on conventional superconductors
Oladunjoye A. Awoga, Kristofer Björnson, Annica M. Black-Schaffer
Majorana bound states (MBS) are well-established in the clean limit in chains of ferromagnetically aligned impurities deposited on conventional superconductors with finite spin-orb…
Exact Solutions of the Klein-Gordon Equation with Hylleraas Potential
Akpan N. Ikot, Oladunjoye A. Awoga, Benedict I. Ita
We present the exact solution of the Klein-Gordon with Hylleraas Potential using the Nikiforov-Uvarov method. We obtain explicitly the bound state energy eigenvalues and the corres…
Solutions of Schrödinger Equation with Generalized Inverted Hyperbolic Potential
Akpan N. Ikot, Oladunjoye A. Awoga, Louis E. Akpabio +1
We present the bound state solutions of the Schrödinger equation with generalized inverted hyperbolic potential using the Nikiforov-Uvarov method. We obtain the energy spectrum and…