20 citations · 142 across the 18 of their papers we have counts for
19 papers
Negative charging energy in LaAlO/SrTiO quantum dots induced by SrTiO polarization
J. Czarnecki, A. Sierant, B. Szafran +12
We propose a microscopic mechanism for the negative charging energy in LaAlO/SrTiO quantum dots, arising from the electrostatic image charge associated with the paraelectri…
Current-driven reduction of topological protection in multichannel superconductors
Alfonso Maiellaro
We investigate the robustness of topological phases in a Kitaev ladder composed of two coupled superconducting chains under the perturbing influence of a finite charge current. By…
Spin Hall and Edelstein effects in a ballistic quantum dot with Rashba spin-orbit coupling
Alfonso Maiellaro, Francesco Romeo, Mattia Trama +11
We study spin-resolved transport in a ballistic quantum dot with Rashba spin-orbit coupling, focusing on charge-to-spin conversion and spin Hall effect. In the regime where the dot…
Boltzmann theory of the inverse Edelstein effect in a two-dimensional Rashba gas
Irene Gaiardoni, Mattia Trama, Alfonso Maiellaro +3
We investigate the inverse Edelstein effect in a non-homogeneous system consisting of a ferromagnetic layer coupled to a Rashba two-dimensional electron gas. Within a semiclassical…
Theory of charge-to-spin conversion under quantum confinement
Alfonso Maiellaro, Francesco Romeo, Mattia Trama +6
The interplay between spin and charge degrees of freedom in low-dimensional systems is a cornerstone of modern spintronics, where achieving all-electrical control of spin currents…
Edelstein Effect in Isotropic and Anisotropic Rashba Models
Irene Gaiardoni, Mattia Trama, Alfonso Maiellaro +3
We investigate spin-to-charge conversion via the Edelstein effect in a 2D Rashba electron gas using the semiclassical Boltzmann approach. We analyze the magnetization arising from…
Non-linear anomalous Edelstein response at altermagnetic interfaces
Mattia Trama, Irene Gaiardoni, Claudio Guarcello +5
In altermagnets, time-reversal symmetry breaking spin-polarizes electronic states, while total magnetization remains zero. In addition, at altermagnetic surfaces Rashba-spin orbit…
Probing Topological Superconductivity of oxide nanojunctions using fractional Shapiro steps
Claudio Guarcello, Alfonso Maiellaro, Jacopo Settino +4
We theoretically discuss the emergence of fractional Shapiro steps in a Josephson junction created by confining a two-dimensional electron gas at an oxide interface. This phenomeno…
Engineered Josephson diode effect in kinked Rashba nanochannels
Alfonso Maiellaro, Mattia Trama, Jacopo Settino +3
The superconducting diode effect, reminiscent of the unidirectional charge transport in semiconductor diodes, is characterized by a nonreciprocal, dissipationless flow of Cooper pa…
Bardeen-Cooper-Schrieffer interaction as an infinite-range Penson-Kolb pairing mechanism
Francesco Romeo, Alfonso Maiellaro
We demonstrate that the well-known Bardeen-Cooper-Schrieffer interaction, when considered in real space, is equivalent to an infinite-range Penson-Kolb…
Local dynamics and detection of topology in spin-1 chains
Alfonso Maiellaro, Hervé Aubin, Andrej Mesaros +1
Antiferromagnetic spin-1 chains host the celebrated symmetry protected topological Haldane phase, whose spin-1/2 edge states were evidenced in bulk by, e.g., Electron Spin Resonanc…
Resilience of topological superconductivity under particle current
Alfonso Maiellaro, Francesco Romeo, Fabrizio Illuminati +1
We investigate the robustness of topological superconductors under the perturbing influence of a finite charge current. To this aim, we introduce a modified Kitaev Hamiltonian para…
Hallmarks of non-trivial topology in Josephson junctions based on oxide nanochannels
Alfonso Maiellaro, Jacopo Settino, Claudio Guarcello +2
We investigate the topological properties of a Josephson junction obtained by constraining a two-dimensional electron gas at oxide interface to form a quasi-1D conductor. We reveal…
Squashed entanglement in one-dimensional quantum matter
Alfonso Maiellaro, Francesco Romeo, Roberta Citro +1
Squashed entanglement and its universal upper bound, the quantum conditional mutual information, are faithful measures of bipartite quantum correlations defined in terms of multipa…
Topological phases of an interacting Majorana Benalcazar-Bernevig-Hughes model
Alfonso Maiellaro, Fabrizio Illuminati, Roberta Citro
We study the effects of Coulomb repulsive interactions on a Majorana Benalcazar-Bernevig-Hughes (MBBH) model. The MBBH model belongs to the class of second--order topological super…
Topological squashed entanglement: nonlocal order parameter for one-dimensional topological superconductors
Alfonso Maiellaro, Antonio Marino, Fabrizio Illuminati
Identifying entanglement-based order parameters characterizing topological systems, in particular topological superconductors and topological insulators, has remained a major chall…
Effects of geometric frustration in Kitaev chains
Alfonso Maiellaro, Francesco Romeo, Roberta Citro
We study the topological phase transitions of a Kitaev chain in the presence of geometric frustration caused by the addition of a single long-range hopping. The latter condition de…
Topological phases of a Kitaev tie
Alfonso Maiellaro, Francesco Romeo, Roberta Citro
We investigate the topological properties of a Kitaev chain in the shape of a legged-ring, which is here referred to as Kitaev tie. We demonstrate that the Kitaev tie is a frustrat…
Unveiling Signatures of Topological Phases in Open Kitaev Chains and Ladders
Alfonso Maiellaro, Francesco Romeo, Carmine Antonio Perroni +2
In this work, the general problem of the characterization of the topological phase of an open quantum system is addressed. In particular, we study the topological properties of Kit…