Zobrazeno 1 - 10
of 176
pro vyhledávání: '"Lobos, A. M."'
We theoretically propose a one-dimensional electronic nanodevice inspired in recently fabricated semiconductor-superconductor-ferromagnetic insulator (SE-SC-FMI) hybrid heterostructures, and investigate its zero-temperature transport properties. Whil
Externí odkaz:
http://arxiv.org/abs/2410.14887
Quantum spin impurities coupled to superconductors are under intense investigation for their relevance to fundamental research as well as the prospects to engineer novel quantum phases of matter. Here we develop a large-$N$ mean-field theory of a str
Externí odkaz:
http://arxiv.org/abs/2408.17281
We theoretically propose a polymer-based nano-device consisting of a single trans-polyacetylene (tPA) molecule capacitively coupled to external voltage gates. We model the integrated device using a Su-Schrieffer-Heeger (SSH)-like Hamiltonian, and we
Externí odkaz:
http://arxiv.org/abs/2404.15257
Using the density-matrix renormalization group, we determine the different topological phases and low-energy excitations of a time-reversal invariant topological superconducting (TRITOPS) wire with extended s-wave superconductivity, Rashba spin-orbit
Externí odkaz:
http://arxiv.org/abs/2311.01880
We theoretically study the spectral properties of a one dimensional semiconductor-superconductor-ferromagnetic insulator (SE-SU-FMI) hybrid nanostructure, motivated by recents experiments where such devices have been fabricated using epitaxial growin
Externí odkaz:
http://arxiv.org/abs/2301.03967
Publikováno v:
Phys. Rev. B, volume 106, year 2022, page 245426
In this work we study the dynamics and stability of charged solitons in trans-polyacetylene (tPA), and revisit the issue of the stability of these non-linear excitations under the effect of an external electric field applied parallel to the polymer.
Externí odkaz:
http://arxiv.org/abs/2207.05173
Publikováno v:
Phys. Rev. B 100, 235110 (2019)
Using the framework of the density-matrix renormalization group (DMRG), we study a quantum dot coupled to a superconducting nanowire with strong Rashba spin-orbit coupling. Regarding the singlet-to-doublet "0-$\pi$" transition that takes place when t
Externí odkaz:
http://arxiv.org/abs/1909.08486
Autor:
Rébola, Alejandro, Lobos, Alejandro M.
Publikováno v:
Phys. Rev. B 100, 235412 (2019)
Motivated by recent experiments, here we study the indirect interactions between magnetic impurities deposited on top of a clean Pb(110) surface induced by the underlying conduction electrons. Our approach makes use of \textit{ab initio} calculations
Externí odkaz:
http://arxiv.org/abs/1908.11268
Publikováno v:
Phys. Rev. B 100, 155111 (2019)
A characteristic feature of Shiba impurities is the existence of a spin- and parity-changing quantum phase transition (known as "0-$\pi$" transition) which has been observed in scanning tunneling microscopy (STM) and transport experiments. Using the
Externí odkaz:
http://arxiv.org/abs/1904.02834
Publikováno v:
iScience 21, 241 (2019)
In this paper, we formulate and quantitatively examine the effect of dissipation on topological systems. We use a specific model of Kitaev quantum wire with an onsite Ohmic dissipation, and perform a numerically exact quantum Monte Carlo simulation t
Externí odkaz:
http://arxiv.org/abs/1812.04471