Tongrui Li

Oct 24, 2024 | link.aps.org | Jiayu Liu |Jie Zhan |Tongrui Li

Rutile has been posited as a potential -wave altermagnetism candidate, with a predicted significant spin splitting up to 1.4 eV. Despite accumulating theoretical predictions and transport measurements, direct spectroscopic observation of spin splitting has remained elusive. Here, we employ spin- and angle-resolved photoemission spectroscopy to investigate the band structures and spin polarization of thin-film and single-crystal .

Apr 22, 2024 | nature.com | Yihao Wang |Zhihao Li |Xuan Luo |Jingjing Gao |Yuyan Han |Jin Tang | +12 more

AbstractWhile the monolayer sheet is well-established as a Mott-insulator with a finite energy gap, the insulating nature of bulk 1T-TaS2 crystals remains ambiguous due to their varying dimensionalities and alterable interlayer coupling. In this study, we present a unique approach to unlock the intertwined two-dimensional Mott-insulator and three-dimensional band-insulator states in bulk 1T-TaS2 crystals by structuring a laddering stack along the out-of-plane direction.

Aug 24, 2023 | link.aps.org | Peng Wu |Bo Zhang |Tongrui Li

Abstract Recently, solid crystalline GeSb2Te4 was found to host topological surface states and low lattice thermal conductivity. In this work, we conducted comprehensive investigations on the electronic structures and lattice dynamics of GeSb2Te4. By combining synchrotron-based and spin-resolved angle-resolved photoemission spectroscopy and first-principles calculations, we observed distinctive topological surface states with significant spin polarization near the Fermi level.