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<p>Transition metal dichalcogenides display a high technological potential due to their wide range of electronic ground states. Here, we unveil that by tuning hydrostatic pressure <i>P</i>, a cascade of electronic phase transitions can be induced in the few-layer transition metal dichalcogenide 1<i>T’</i>-WS<sub>2</sub>. As <i>P</i> increases, we observe the suppression of superconductivity with the concomitant emergence of an anomalous Hall effect (AHE) at <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41467_2025_56919_Article_IEq1.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="66" /> </InlineMediaObject> <EquationSource Format="TEX">\(P\approx 1.15\)</EquationSource> <EquationSource Format="MATHML"><math> <mi>P</mi> <mo>≈</mo> <mn>1.15</mn> </math></EquationSource> </InlineEquation> GPa. Above 1.6GPa, we uncover a reentrant superconducting state emerging from a state still exhibiting AHE. This superconducting state competes with the AHE state and shows a marked increase in superconducting anisotropy with respect to the ambient pressure phase, suggesting a distinct pairing symmetry. We demonstrate that 1<i>T’</i>-WS<sub>2</sub> concomitantly transitions into a strong topological phase with different band orbital characters and Fermi surfaces contributing to the superconductivity. These findings position 1<i>T’</i>-WS<sub>2</sub> as a tunable superconductor, wherein superconductivity, AHE, and band features can be tuned reversibly.</p>

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Tunable superconductivity coexisting with the anomalous Hall effect in a transition metal dichalcogenide

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月10日

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  • Md Shafayat Hossain,
  • Qi Zhang,
  • David Graf,
  • Mikel Iraola,
  • Tobias Müller,
  • Sougata Mardanya,
  • Yi-Hsin Tu,
  • Zhuangchai Lai,
  • Martina O. Soldini,
  • Siyuan Li,
  • Yao Yao,
  • Yu-Xiao Jiang,
  • Zi-Jia Cheng,
  • Maksim Litskevich,
  • Brian Casas,
  • Tyler A. Cochran,
  • Xian P. Yang,
  • Byunghoon Kim,
  • Kenji Watanabe,
  • Takashi Taniguchi,
  • Sugata Chowdhury,
  • Arun Bansil,
  • Hua Zhang,
  • Tay-Rong Chang,
  • Mark H. Fischer,
  • Titus Neupert,
  • Luis Balicas,
  • M. Zahid Hasan

摘要

Transition metal dichalcogenides display a high technological potential due to their wide range of electronic ground states. Here, we unveil that by tuning hydrostatic pressure P, a cascade of electronic phase transitions can be induced in the few-layer transition metal dichalcogenide 1T’-WS2. As P increases, we observe the suppression of superconductivity with the concomitant emergence of an anomalous Hall effect (AHE) at \(P\approx 1.15\) P ≈ 1.15 GPa. Above 1.6GPa, we uncover a reentrant superconducting state emerging from a state still exhibiting AHE. This superconducting state competes with the AHE state and shows a marked increase in superconducting anisotropy with respect to the ambient pressure phase, suggesting a distinct pairing symmetry. We demonstrate that 1T’-WS2 concomitantly transitions into a strong topological phase with different band orbital characters and Fermi surfaces contributing to the superconductivity. These findings position 1T’-WS2 as a tunable superconductor, wherein superconductivity, AHE, and band features can be tuned reversibly.