Weakly superconducting anisotropy in 4Hb-Nb0.95Ti0.05Se2 with 1T/1H heterostructure

Fanyu Meng; Hechang Lei

Weakly superconducting anisotropy in 4Hb-Nb0.95Ti0.05Se2 with 1T/1H heterostructure

Superconductivity 2025-09-11 v1 Strongly Correlated Electrons

Authors: Fanyu Meng , Hechang Lei

Abstract

Heterostructures of layered transition metal dichalcogenide (TMD) exhibit rich physical properties by the combination of strong electronic correlation effects in 1T layer and superconductivity in 1H layer. But the limited number of bulk TMD materials with such heterostructures impedes the in-depth understanding of the physical mechanisms behind these properties, as well as research on tuning of these properties. Here, we report a systematic study on physical properties of the 4Hb-Nb0.95Ti0.05Se2 single crystals with 1T/1H heterostructure. It exhibits a superconducting transition at temperature below 3.3 K. Further analysis indicates that 4Hb-Nb0.95Ti0.05Se2 is an intermediately coupled type-II superconductor. Moreover, 4Hb-Nb0.95Ti0.05Se2 shows a rather weak superconducting anisotropy (~ 2), distinctly different from other known TMD superconductors with 4Hb heterostructure.

Keywords

transition metal dichalcogenide superconductivity heterostructure anisotropy Nb-Ti alloy

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@article{arxiv.2509.08716,
  title  = {Weakly superconducting anisotropy in 4Hb-Nb0.95Ti0.05Se2 with 1T/1H heterostructure},
  author = {Fanyu Meng and Hechang Lei},
  journal= {arXiv preprint arXiv:2509.08716},
  year   = {2025}
}

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16 pages and 4 figures

Weakly superconducting anisotropy in 4Hb-Nb0.95Ti0.05Se2 with 1T/1H heterostructure

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