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Dirac Magnons in a Honeycomb Lattice Quantum XY Magnet CoTiO 3
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Light-Driven Raman Coherence as a Nonthermal Route to Ultrafast Topology Switching in a Dirac Semimetal
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Coexistence of Surface Superconducting and Three-Dimensional Topological Dirac States in Semimetal KZnBi
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Revealing Fano resonance in the Dirac material ZrTe 5 through Raman scattering
Here, we explore the Fano resonance in ZrTe 5 , using terahertz Raman scattering measurements. We identified two closely spaced B 2g phonon modes, B 2g I and B 2g II, around 9 meV and 11 meV, respectively. Interestingly, only B 2g I exhibited the Fano resonance, an outcome of quantum interference between discrete phonon modes and continuous electronic excitations. This is consistent with the much stronger electron-phonon coupling of B 2g I mode demonstrated by first-principles calculations. Additionally, temperature-dependent measurements highlight an enhanced Fano asymmetry at elevated temperatures, contributed by the thermal renormalization of the band structure and electron-phonon coupling. This study offers insights into the complex interrelation of electron-phonon coupling, thermal effects, and Fano resonances in topological materials.
Solving DWF dirac equation using multi-splitting preconditioned conjugate gradient with tensor cores on NVIDIA GPUs
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Zero-field Josephson diode effect in dirac semimetal-based asymmetric squids
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Zero-magnetic-field superconducting Josephson diode effect in a Dirac semimetal
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Prospects for Ultra-Low MTE Photocathodes: A Case Study on Dirac Semimetal Cd3As2
Presentation at the Photocathode Physics for Photoinjectors Workshop (Arizona State University, Tempe, AZ, November 13, 2025) on the prospects for Ultra-Low MTE Photocathodes.
Terahertz Landau level spectroscopy of Dirac fermions in millimeter-scale twisted bilayer graphene
Exotic electronic physics including correlated insulating states and fractional Chern insulators have been observed in twisted bilayer graphene in a magnetic field when the Fermi velocity vanishes, however a question remains as to the stability of these states which is controlled by the gap to the first excited state. Free-space terahertz magneto-optics can directly probe the gap to charge excitations which bounds the stability of electronic states, but this measurement has thus-far been inaccessible due to the micron size of twisted bilayer graphene samples, while the wavelength of terahertz light is up to a millimeter. Here we leverage advances in fabrication to create twisted bilayer graphene samples over 5 mm x 5 mm in size with a uniform twist angle and study the magnetic field dependence of the cyclotron resonance by a complex Faraday rotation experiment in p-doped large angle twisted bilayer graphene. These measurements directly probe charge excitations in inter-Landau level transitions and determine the Fermi velocity as a function of twist angle.
The Bactrian Effect: Multiple Resonances and Light Dirac Dark Matter
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Anomalous Shaprio steps in a Dirac semimetal Cd3As2-based SQUID.
Abstract not provided.
Josephson-Leggett modes in a Dirac semimetal Cd3As2-based SQUID.
Abstract not provided.
Elucidating the chiral anomaly in the electronic structure of Dirac materials
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