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Träfflista för sökning "WFRF:(Kharzeev Dmitri E.) "

Sökning: WFRF:(Kharzeev Dmitri E.)

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1.
  • Shao, Yinming, et al. (författare)
  • Faraday Rotation Due to Surface States in the Topological Insulator (Bi1-xSbx)(2)Te-3
  • 2017
  • Ingår i: Nano letters (Print). - : American Chemical Society (ACS). - 1530-6984 .- 1530-6992. ; 17:2, s. 980-984
  • Tidskriftsartikel (refereegranskat)abstract
    • Using magneto-infrared spectroscopy, we have explored the charge dynamics of (Bi,Sb)(2)Te-3 thin films on InP substrates. From the magneto-transmission data we extracted three distinct cyclotron resonance (CR) energies that are all apparent in the broad band Faraday rotation (FR) spectra. This comprehensive FR-CR data set has allowed us to isolate the response of the bulk states from the intrinsic surface states associated with both the top and bottom surfaces of the film. The FR data uncovered that electron- and hole-type Dirac Fermions reside on opposite surfaces of our films, which paves the way for observing many exotic quantum phenomena in topological insulators.
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2.
  • Tsuneto, Makoto, et al. (författare)
  • Anomalous thermal effect in ZrTe5 observed via photothermal measurements
  • 2024
  • Ingår i: Physical Review Applied. - : American Physical Society (APS). - 2331-7019. ; 21:3
  • Tidskriftsartikel (refereegranskat)abstract
    • In this study, we explore the magnetothermoelectric power (MTP) of ZrTe5, a canonical Dirac semimetal, through a photothermal technique. Unlike conventional thermoelectric studies that rely on on-chip heaters and are limited by fabrication processes, especially for stress-sensitive materials, our approach utilizes photothermal effects to induce temperature gradients. Our experiments, applying a magnetic field approximately parallel and transverse to the photocurrent detection direction, reveal that the photothermal method efficiently and reliably extracts both diagonal and off-diagonal components of the thermoelectric coefficient of ZrTe5. We observe that the longitudinal MTP reproduces features previously reported in thermal transport studies, while the photoinduced transverse MTP confirms the anomalous Nernst effect. This photothermal measurement technique opens avenues for investigating transport properties in a wide range of quantum materials, in both three-dimensional and two-dimensional systems.
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