Eduardo J. H. Lee

Universidad Autónoma de Madrid

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E. Longo

Universidade Federal de São Carlos

Marko Burghard

Max Planck Institute for Solid State Research

F. M. Pontes

Universidade Estadual Paulista (Unesp)

Klaus Kern

École Polytechnique Fédérale de Lausanne

Edson R. Leite

Universidade Federal de São Carlos

Ramón Aguado

Instituto de Ciencia de Materiales de Madrid

Cauê Ribeiro

Brazilian Agricultural Research Corporation

P.S. Pizani

Universidade Federal de São Carlos

Kannan Balasubramanian

Humboldt-Universität zu Berlin

S. De Franceschi

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Cooperative Institutions

Universidade Federal de São Carlos

Universidade Estadual Paulista (Unesp)

Universidad Autónoma de Madrid

Centre National de la Recherche Scientifique

Max Planck Institute for Solid State Research

Universidade de São Paulo

Delft University of Technology

École Polytechnique Fédérale de Lausanne

Eindhoven University of Technology

Max Planck Society

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From Andreev to Majorana bound states in hybrid superconductor–semiconductor nanowires

Nature Reviews Physics (2020)

Elsa Prada Pablo San-José Michiel W. A. de Moor Attila Geresdi Eduardo J. H. Lee

10.1038/s42254-020-0228-y

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Citations (388)

Preparation, microstructural and electrical characterization of SrTiO3 thin films prepared by chemical route

Journal of the European Ceramic Society (2001)

F. M. Pontes Edson R. Leite Eduardo J. H. Lee E. Longo J.A. Varela

Dissipation factor

Ohmic contact

Strontium titanate

Spin Coating

10.1016/s0955-2219(00)00194-1

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Citations (30)

From Andreev to Majorana bound states in hybrid superconductor-semiconductor nanowires

Bulletin of the American Physical Society (2021)

Elsa Prada Pablo San-José Michiel de Moor Attila Geresdi Eduardo J. H. Lee

Electronic excitations above the ground state must overcome an energy gap in superconductors with spatially-homogeneous s-wave pairing. In contrast, inhomogeneous superconductors such as those with magnetic impurities or weak links, or heterojunctions containing normal metals or quantum dots, can host subgap electronic excitations that are generically known as Andreev bound states (ABSs). With the advent of topological superconductivity, a new kind of ABS with exotic qualities, known as Majorana bound state (MBS), has been discovered. We review the main properties of ABSs and MBSs, and the state-of-the-art techniques for their detection. We focus on hybrid superconductor-semiconductor nanowires, possibly coupled to quantum dots, as one of the most flexible and promising experimental platforms. We discuss how the combined effect of spin-orbit coupling and Zeeman field in these wires triggers the transition from ABSs into MBSs. We show theoretical progress beyond minimal models in understanding experiments, including the possibility of different types of robust zero modes that may emerge without a band-topological transition. We examine the role of spatial non-locality, a special property of MBS wavefunctions that, together with non-Abelian braiding, is the key to realizing topological quantum computation.

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Photoluminescence at room temperature in amorphous SrTiO3 thin films obtained by chemical solution deposition

Materials Chemistry and Physics (2002)

F. M. Pontes E. Longo Edson R. Leite Eduardo J. H. Lee Jesús A. Varela

Strontium titanate

Absorption edge

Pulsed Laser Deposition

10.1016/s0254-0584(02)00112-8

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Citations (102)

Nanoscale‐Confined Terahertz Polaritons in a van der Waals Crystal

Advanced Materials (2020)

Thales V. A. G. de Oliveira Tobias Nörenberg Gonzalo Álvarez‐Pérez Lukas Wehmeier Javier Taboada‐Gutiérrez

Abstract Electromagnetic field confinement is crucial for nanophotonic technologies, since it allows for enhancing light–matter interactions, thus enabling light manipulation in deep sub‐wavelength scales. In the terahertz (THz) spectral range, radiation confinement is conventionally achieved with specially designed metallic structures—such as antennas or nanoslits—with large footprints due to the rather long wavelengths of THz radiation. In this context, phonon polaritons—light coupled to lattice vibrations—in van der Waals (vdW) crystals have emerged as a promising solution for controlling light beyond the diffraction limit, as they feature extreme field confinements and low optical losses. However, experimental demonstration of nanoscale‐confined phonon polaritons at THz frequencies has so far remained elusive. Here, it is provided by employing scattering‐type scanning near‐field optical microscopy combined with a free‐electron laser to reveal a range of low‐loss polaritonic excitations at frequencies from 8 to 12 THz in the vdW semiconductor α‐MoO 3 . In this study, THz polaritons are visualized with: i) in‐plane hyperbolic dispersion, ii) extreme nanoscale field confinement (below λ o ⁄75), and iii) long polariton lifetimes, with a lower limit of >2 ps.

Nanophotonics

Surface phonon

10.1002/adma.202005777

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Citations (76)

Replicas of Andreev spectra in InSb nanowires

Bulletin of the American Physical Society (2018)

Azarin Zarassi Zhaoen Su Jen‐Feng Hsu Pablo San-José Elsa Prada

Andreev reflection

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Effects of post-annealing on the dielectric properties of Au/BaTiO3/Pt thin film capacitors

Materials Letters (2003)

Eduardo J. H. Lee F. M. Pontes Edson R. Leite E. Longo Rodrigo Facchini Magnani

Barium titanate

10.1016/j.matlet.2003.10.047

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Citations (16)

Contact and edge effects in graphene devices

Nature Nanotechnology (2008)

Eduardo J. H. Lee Kannan Balasubramanian R. Thomas Weitz Marko Burghard Klaus Kern

Photocurrent

Charge carrier

10.1038/nnano.2008.172

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Citations (710)

Gate dependent photocurrents at a graphene p-n junction

Applied Physics Letters (2010)

Eva C. Peters Eduardo J. H. Lee Marko Burghard Klaus Kern

We have used scanning photocurrent microscopy to explore the electronic characteristics of a graphene p-n junction fabricated by local chemical doping of a graphene sheet. The photocurrent signal at the junction was found to be most prominent for gate voltages between the two Dirac points of the oppositely doped graphene regions. The gate dependence of this signal agrees well with simulations based upon the Fermi level difference between the two differently doped sections. It is concluded that the photocurrent maps are dominated by the built-in electric field, with only a minor photothermoelectric contribution.

Photocurrent

SIGNAL (programming language)

Photoconductivity

10.1063/1.3505926

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Citations (129)

Journal of Materials Science Letters (2000)

Eduardo J. H. Lee F. M. Pontes Edson R. Leite E. Longo J.A. Varela

10.1023/a:1011027624446

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Citations (32)