Samuel D. Escribano

Samuel D. Escribano
Universidad Autónoma de Madrid | UAM · Department of Theoretical Condensed Matter Physics

PhD student

About

11
Publications
607
Reads
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84
Citations
Citations since 2016
11 Research Items
84 Citations
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Introduction
My research interests include the theoretical study of low-dimensional materials, particularly superconductor-semiconductor heterostructures. I focus on the impact of the electrostatic environment on their basic properties (spin-orbit coupling, band-aligment, orbital effects...) as well as on their possible topological properties (Majorana modes). To this end, I perform detailed numerical simulations of realistic experimental devices.
Additional affiliations
April 2018 - present
Universidad Autónoma de Madrid
Position
  • PhD Student
December 2017 - March 2018
Universidad Autónoma de Madrid
Position
  • Research Assistant
Education
September 2016 - July 2017
Universidad Autónoma de Madrid
Field of study
  • Condensed Matter Physics (nanophysics)
September 2012 - July 2016
Universidad Autónoma de Madrid
Field of study
  • Physics

Publications

Publications (11)
Article
Full-text available
Hybrid structures of semiconducting (SM) nanowires, epitaxially grown superconductors (SC), and ferromagnetic-insulator (FI) layers have been explored experimentally and theoretically as alternative platforms for topological superconductivity at zero magnetic field. Here, we analyze a tripartite SM/FI/SC heterostructure but realized in a planar sta...
Preprint
Full-text available
Hybrid structures of semiconducting (SM) nanowires, epitaxially grown superconductors (SC), and ferromagnetic-insulator (FI) layers have been explored experimentally and theoretically as alternative platforms for topological superconductivity at zero magnetic field. Here, we analyze a tripartite SM/FI/SC heterostructure but realized in a planar sta...
Article
We analyze the subgap excitations and phase diagram of a quantum dot (QD) coupled to a semiconducting nanowire fully wrapped by a superconducting (S) shell. We take into account how a Little-Parks (LP) pairing fluxoid (a winding in the S phase around the shell) influences the proximity effect on the dot. We find that under axially symmetric QD-S co...
Preprint
Full-text available
We analyze the subgap excitations and phase diagram of a quantum dot (QD) coupled to a semiconducting nanowire fully wrapped by a superconducting (S) shell. We take into account how a Little-Parks (LP) pairing vortex in the shell influences the proximity effect on the dot. We find that under axially symmetric QD-S coupling, shell vortices cause the...
Article
Full-text available
Hybrid semiconducting nanowire devices combining epitaxial superconductor and ferromagnetic insulator layers have been recently explored experimentally as an alternative platform for topological superconductivity at zero applied magnetic field. In this proof-of-principle work we show that the topological regime can be reached in actual devices depe...
Preprint
Full-text available
Hybrid semiconducting nanowire devices combining epitaxial superconductor and ferromagnetic insulator layers have been recently explored experimentally as an alternative platform for topological superconductivity at zero applied magnetic field. In this proof-of-principle work we show that the topological regime can be reached in actual devices depe...
Article
Full-text available
Semiconductor Rashba nanowires are quasi-one-dimensional systems that have large spin-orbit (SO) coupling arising from a broken inversion symmetry due to an external electric field. There exist parametrized multiband models that can describe accurately this effect. However, simplified single band models are highly desirable to study geometries of r...
Preprint
Full-text available
Semiconductor Rashba nanowires are quasi-one dimensional materials that have large spin-orbit (SO) coupling arising from a broken crystal potential symmetry due to an external electric field. There exist parametrized multiband models that can describe accurately this effect. However, simplified single band models are highly desirable to study geome...
Article
Full-text available
Finding ways of creating, measuring, and manipulating Majorana bound states (MBSs) in superconducting-semiconducting nanowires is a highly pursued goal in condensed matter physics. It was recently proposed that a periodic covering of the semiconducting nanowire with superconductor fingers would allow both gating and tuning the system into a topolog...
Preprint
Full-text available
Finding ways of creating, measuring and manipulating Majorana bound states (MBSs) in superconducting-semiconducting nanowires is a highly pursued goal in condensed matter physics. It was recently proposed that a periodic covering of the semiconducting nanowire with superconductor fingers would allow both gating and tuning the system into a topologi...
Article
Full-text available
Majorana modes emerge in non-trivial topological phases at the edges of some specific materials, like proximitized semiconducting nanowires under a external magnetic field. Ideally, they are non-local states that are charge neutral superpositions of electrons and holes. However, in nanowires of realistic length their wave functions overlap and acqu...

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Projects

Project (1)
Project
To describe and understand the role of the electrostatic environment and the electron-electron interactions in semiconductor-superconductor heterostructures, with an special focus on Majorana nanowires devices.