Evidence for Multiband Gapless Superconductivity in the Topological Superconductor Candidate 4Hb−TaS2
Hanru Wang, Yihan Jiao, Fanyu Meng, Xu Zhang, Dongzhe Dai, Chengpeng Tu, Chengcheng Zhao, Lu Xin, Sicheng Huang, Hechang Lei, Shiyan Li
DOI 10.1103/d13p-mtbz · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We present the ultra-low-temperature thermal conductivity measurements on single crystals of the transition-metal dichalcogenide material 4Hb−TaS2, which has recently been proposed as a topological superconductor candidate. In zero field, a small residual linear term κ0/T is observed, indicating the existence of a residual density of states in the superconducting state. The slow field dependence of κ0/T at low fields rules out the presence of nodes in the superconducting gap, and the S-shaped field dependence across the full field range suggests multiple superconducting gaps in 4Hb−TaS2. Our results provide evidence for multiband gapless superconductivity in 4Hb−TaS2, and the residual density of states come from certain gapless Fermi surfaces.
Similar papers
Robust gapless superconductivity in 4Hb−TaS2
similarity 0.94David Dentelski et al.
Source status unknown — claims are unverified
Evidence for multiband gapless superconductivity in the topological superconductor candidate 4Hb-TaS2
similarity 0.94Hanru Wang et al. · 2024 · arXiv:2412.08450
Source status unknown — claims are unverified
Nodeless superconductivity in 4Hb−TaS2 with broken time-reversal symmetry
similarity 0.93Yuwei Zhou et al.
Source status unknown — claims are unverified
Nodeless superconducting gaps in noncentrosymmetric superconductor PbTaSe2 with topological bulk nodal lines
similarity 0.92M. X. Wang et al.
Source status unknown — claims are unverified
Thermal transport and low-temperature specific heat in 4Hb-TaS
similarity 0.92M. Gillig et al. · 2026 · arXiv:2606.30874
Source status unknown — claims are unverified
Nodeless superconducting gap in the topological superconductor candidate 2M–WS2
similarity 0.91L. S. Wang et al.
Source status unknown — claims are unverified