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Showing 1–8 of 8 results
Advanced filters: Author: Seongshik Oh Clear advanced filters

  • Charge-to-spin conversion is a key theme of spintronics and its realization in topological materials is highly desired. Here, Liu et al. report spatial imaging of current-induced spin accumulation at the edges of Bi2Se3 and BiSbTeSe2 topological insulators.

    • Yang Liu
    • Jean Besbas
    • Hyunsoo Yang
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-6

  • Researchers demonstrate a method based on circularly polarized laser-field-driven high-harmonic generation for probing non-trivial and trivial topological phases in a three-dimensional topological insulator.

    • Christian Heide
    • Yuki Kobayashi
    • Shambhu Ghimire
    Research
    Nature Photonics
    Volume: 16, P: 620-624

  • Delafossite PdCoO2 boasts outstanding electronic transport properties, making it an interesting plasmonic material. Here, experimental evidence of surface plasmons in micro-ribbon samples is presented.

    • Salvatore Macis
    • Luca Tomarchio
    • Stefano Lupi
    ResearchOpen Access
    Communications Physics
    Volume: 5, P: 1-6

  • The terahertz response of topological insulator surface states, in which relativistic electrons are protected from backscattering, possesses potential optic and plasmonic applications. Here, the authors demonstrate a nonlinear absorption response of Bi2Se3to terahertz electric fields.

    • Flavio Giorgianni
    • Enrica Chiadroni
    • Stefano Lupi
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-6

  • For optical control of plasmons metals require a large amount of power in the control pulse, yielding a small modulation depth. Here, Sim et al. fabricate arrays of Bi2Se3 and report a modulation depth of 2,400% at 1.5 THz with an optical fluence of 45 μJ/cm2, demonstrating a novel route for controlling plasmons.

    • Sangwan Sim
    • Houk Jang
    • Hyunyong Choi
    ResearchOpen Access
    Nature Communications
    Volume: 6, P: 1-7

  • PdCoO2 belongs to a class of materials where both weakly and strongly correlated electrons co-exist side-by-side in different layers of the crystal structure. Here, the authors investigate PdCoO2 using standing wave photoemission spectroscopy and many-body calculations reporting layer-specific details about the electronic structure.

    • Qiyang Lu
    • Henrique Martins
    • Slavomir Nemsak
    ResearchOpen Access
    Communications Physics
    Volume: 4, P: 1-8

  • Using a combination of angle-dependent spectroscopic ellipsometry and angle-resolved photoemission spectroscopy as a function of temperature and supported by first-principles calculations, we reveal a new pair of correlated plasmonic excitations at 1.04 and 1.52 eV and a significant Fermi level shift of 0.12 eV, accompanied by spectral weight transfer in the topological insulator, Bismuth Selenide (Bi2Se3). Interestingly, such a spectral weight transfer over a broad energy range causes a drastic change in the charge-carrier density whereby the contribution of charge-carriers in the bulk starts to rival those in the surface states and Bi2Se3 becomes more uniformly conducting.

    • Thomas J. Whitcher
    • Mathieu G. Silly
    • Andrivo Rusydi
    ResearchOpen Access
    NPG Asia Materials
    Volume: 12, P: 1-9