122 citations · 886 across the 47 of their papers we have counts for
31 papers · 1 filter
Scanning Gate Microscopy Modulation of Supercurrent in Graphene Josephson Junctions
Ivan Villani, Samuele Fracassi, Niccolò Traverso Ziani +9
Graphene Josephson junctions represent an excellent platform for quantum technologies, thanks to the combination of high carrier mobility, ballistic transport, and large gate-tunab…
Confinement-induced Majorana modes in a nodal topological superconductor
Simone Traverso, Niccolò Traverso Ziani, Maura Sassetti +1
We investigate the topological phase diagram of {an extension of the Haldane model with equal spin pairing superconductivity}. In two dimensions, we find a topological nodal superc…
Effects of the Vertices on the Topological Bound States in a Quasicrystalline Topological Insulator
Simone Traverso, Niccolò Traverso Ziani, Maura Sassetti
The experimental realization of twisted bilayer graphene strongly pushed the inspection of bilayer systems. In this context, it was recently shown that a two layer Haldane model wi…
Role of the edges in a quasicrystalline Haldane model
Simone Traverso, Maura Sassetti, Niccolò Traverso Ziani
We study the role of the edges in determining the features of the topological phase in a quasicrystalline higher order topological insulator. We consider a specific model consistin…
Assessing bound states in a one-dimensional topological superconductor: Majorana versus Tamm
Lucia Vigliotti, Fabio Cavaliere, Matteo Carrega +1
Majorana bound states in topological superconductors have attracted intense research activity in view of applications in topological quantum computation. However, they are not the…
Anomalous flux periodicity in proximitised quantum spin Hall constrictions
Lucia Vigliotti, Alessio Calzona, Björn Trauzettel +2
We theoretically analyse a long constriction between the helical edge states of a two-dimensional topological insulator. The constriction is laterally tunnel-coupled to two superco…
Rashba-controlled thermal valve in helical liquids
Alessio Calzona, Niccolò Traverso Ziani, Matteo Carrega +1
In the context of one-dimensional fermionic systems, helical Luttiger liquids are not only characterized by intriguing spin properties, but also by the possibility to be manipulate…
Signature of Generalized Gibbs Ensemble Deviation from Equilibrium: Negative Absorption Induced by a Local Quench
Lorenzo Rossi, Fabrizio Dolcini, Fabio Cavaliere +3
When a parameter quench is performed in an isolated quantum system with a complete set of constants of motion, its out of equilibrium dynamics is considered to be well captured by…
Backscattering off a driven Rashba impurity at the helical edge
Lorenzo Privitera, Niccolò Traverso Ziani, Inès Safi +1
The spin degree of freedom is crucial for both understanding and exploiting the particular properties of the edges of two-dimensional topological insulators. In the absence of supe…
From fractional solitons to Majorana fermions in a paradigmatic model of topological superconductivity
N. Traverso Ziani, C. Fleckenstein, L. Vigliotti +2
Majorana bound states are interesting candidates for applications in topological quantum computation. Low energy models allowing to grasp their properties are hence conceptually im…
Formation and detection of Majorana modes in quantum spin Hall trenches
C. Fleckenstein, N. Traverso Ziani, A. Calzona +2
We propose a novel realization for a topologically superconducting phase hosting Majorana zero-modes on the basis of quantum spin Hall systems. Remarkably, our proposal is complete…
Coherent charge and spin oscillations induced by local quenches in nanowires with spin-orbit coupling
F. Cavaliere, N. Traverso Ziani, F. Dolcini +2
When a local and attractive potential is quenched in a nanowire, the spectrum changes its topology from a purely continuum to a continuum and discrete portion. We show that, under…
Transport signatures of a Floquet topological transition at the helical edge
C. Fleckenstein, N. Traverso Ziani, L. Privitera +2
The manipulation of the helical edge states of two-dimensional topological insulators is crucial for the development of technological applications. Recently, an important step forw…
Interacting topological edge channels
Jonas Strunz, Jonas Wiedenmann, Christoph Fleckenstein +10
Electrical currents in a quantum spin Hall insulator are confined to the boundary of the system. The charge carriers can be described as massless relativistic particles, whose spin…
Feasible model for photo-induced interband pairing
S. Porta, L. Privitera, N. Traverso Ziani +3
Recently, it has been proposed that a mechanism for the appearance of non-equilibrium superconductivity in a resonantly driven semiconductor with repulsive interband interactions e…
Decaying spectral oscillations in a Majorana wire with finite coherence length
C. Fleckenstein, F. Domínguez, N. Traverso Ziani +1
Motivated by recent experiments, we investigate the excitation energy of a proximitized Rashba wire in the presence of a position dependent pairing. In particular, we focus on the…
Signatures of interaction-induced helical gaps in nanowire quantum point contacts
S. Heedt, N. Traverso Ziani, F. Crépin +6
Spin-momentum locking in a semiconductor device with strong spin-orbit coupling (SOC) is a fundamental goal of nanoscale spintronics and an important prerequisite for the formation…
Fractional charge oscillations in quantum spin Hall quantum dots
N. Traverso Ziani, C. Fleckenstein, G. Dolcetto +1
We show that correlated two-particle backscattering can induce fractional charge oscillations in a quantum dot built at the edge of a two-dimensional topological insulator by means…
The chiral anomaly in real space
Christoph Fleckenstein, Niccolò Traverso Ziani, Björn Trauzettel
The chiral anomaly is based on a non-conserved chiral charge and can happen in Dirac fermion systems under the influence of external electromagnetic fields. In this case, the spect…
Correlation and current anomalies in helical quantum dots
Christophe De Beule, Niccolo T. Ziani, Mohammad Zarenia +2
We theoretically investigate the ground-state properties of a quantum dot defined on the surface of a strong three-dimensional time-reversal invariant topological insulator. Confin…
Charge and spin density in the helical Luttinger liquid
N. Traverso Ziani, C. Fleckenstein, F. Crépin +1
The weakly interacting helical Luttinger liquid, due to spin momentum locking, is characterized by extremely peculiar local observables: we show that the density-density correlatio…
Anomalous Friedel oscillations in a quasi-helical quantum dot
F. M. Gambetta, N. Traverso Ziani, S. Barbarino +2
The charge and spin patterns of a quantum dot embedded into a spin-orbit coupled quantum wire subject to a magnetic field are investigated. A Luttinger liquid theory is developed,…
Theory of the STM detection of Wigner molecules in spin incoherent CNTs
N. Traverso Ziani, F. Cavaliere, M. Sassetti
The linear conductance of a carbon nanotube quantum dot in the Wigner molecule regime, coupled to two scanning tunnel microscope tips is inspected. Considering the high temperature…
Spin textures of strongly correlated spin Hall quantum dots
G. Dolcetto, N. Traverso Ziani, M. Biggio +2
We study the spin ordering of a quantum dot defined via magnetic barriers in an interacting quantum spin Hall edge. The spin-resolved density-density correlation functions are comp…