71 citations · 458 across the 31 of their papers we have counts for
9 papers · 1 filter
Revealing Intrinsic Anisotropy of Collective Magnetic Excitations in Twinned Crystals of a Kitaev-Heisenberg Quantum Magnet
Naipeng Zhang, Nikolai Simonov, Mykhaylo Ozerov +11
Quantum magnets with competing interactions often emerge from delicate balances among microscopic parameters, making it essential to disentangle intrinsic spin dynamics from extrin…
Isotropic Dirac fermion and anomalous oscillator strength of zeroth Landau level transition
Zeping Shi, Wenbin Wu, Guangyi Wang +12
Dirac fermions, characterized by their linear dispersion and relativistic nature, have emerged as a prominent class of quasiparticles in condensed matter physics. While the Dirac e…
Unveiling three types of fermions in a nodal ring topological semimetal through magneto-optical transitions
Jiwon Jeon, Taehyeok Kim, Jiho Jang +5
We investigate the quasiparticles of a single nodal ring semimetal SrAs through axis-resolved magneto-optical measurements. We observe three types of Landau levels scaling as $…
Revealing temperature evolution of the Dirac band in ZrTe via magneto-infrared spectroscopy
Yuxuan Jiang, Tianhao Zhao, Luojia Zhang +5
We report the temperature evolution of the Dirac band in semiconducting zirconium pentatelluride (ZrTe) using magneto-infrared spectroscopy. We find that the band gap is temper…
Topological Lifshitz transition and one-dimensional Weyl mode in HfTe5
Wenbin Wu, Zeping Shi, Yuhan Du +11
Landau band crossings typically stem from the intra-band evolution of electronic states in magnetic fields and enhance the interaction effect in their vicinity. Here in the extreme…
Coherent strong-coupling of terahertz magnons and phonons in a Van der Waals antiferromagnetic insulator
Qi Zhang, Mykhaylo Ozerov, Emil Vinas Boström +10
Emergent cooperative motions of individual degrees of freedom, i.e. collective excitations, govern the low-energy response of system ground states under external stimulations and p…
Electron-Hole Asymmetry of Surface States in Topological Insulator Sb2Te3 Thin Films Revealed by Magneto-Infrared Spectroscopy
Yuxuan Jiang, Mahmoud M. Asmar, Xingyue Han +7
When surface states (SSs) form in topological insulators (TIs), they inherit the properties of bulk bands, including the electron-hole (e-h) asymmetry but with much more profound i…
Field-Induced Gap in a Quantum Spin-1/2 Chain in a Strong Magnetic Field
S. A. Zvyagin, E. Čižmár, M. Ozerov +4
Magnetic excitations in copper pyrimidine dinitrate, a spin-1/2 antiferromagnetic chain with alternating -tensor and Dzyaloshinskii-Moriya interactions that exhibits a field-ind…
THz-range free-electron laser ESR spectroscopy: techniques and applications in high magnetic fields
S. A. Zvyagin, M. Ozerov, E. Čižmár +6
The successful use of picosecond-pulse free-electron-laser (FEL) radiation for the continuous-wave THz-range electron spin resonance (ESR) spectroscopy has been demonstrated. The c…