Ultrahigh supercurrent density in a two-dimensional topological material

Qi Zhang, Md Shafayat Hossain, Brian Casas, Wenkai Zheng, Zi Jia Cheng, Zhuangchai Lai, Yi Hsin Tu, Guoqing Chang, Yao Yao, Siyuan Li, Yu Xiao Jiang, Sougata Mardanya, Tay Rong Chang, Jing Yang You, Yuan Ping Feng, Guangming Cheng, Jia Xin Yin, Nana Shumiya, Tyler A. Cochran, Xian P. YangMaksim Litskevich, Nan Yao, Kenji Watanabe, Takashi Taniguchi, Hua Zhang, Luis Balicas, M. Zahid Hasan

Research output: Journal article publicationJournal articleAcademic researchpeer-review


Ongoing advances in superconductors continue to revolutionize technology thanks to the increasingly versatile and robust availability of lossless supercurrents. In particular, high supercurrent density can lead to more efficient and compact power transmission lines, high-field magnets, as well as high-performance nanoscale radiation detectors and superconducting spintronics. Here, we report the discovery of an unprecedentedly high superconducting critical current density (17MA/cm2 at 0 T and 7MA/cm2 at 8 T) in 1T′-WS2, exceeding those of all reported two-dimensional superconductors to date. 1T′-WS2 features a strongly anisotropic (both in- and out-of-plane) superconducting state that violates the Pauli paramagnetic limit signaling the presence of unconventional superconductivity. Spectroscopic imaging of the vortices further substantiates the anisotropic nature of the superconducting state. More intriguingly, the normal state of 1T′-WS2 carries topological properties. The band structure obtained via angle-resolved photoemission spectroscopy and first-principles calculations points to a Z2 topological invariant. The concomitance of topology and superconductivity in 1T′-WS2 establishes it as a topological superconductor candidate, which is promising for the development of quantum computing technology.

Original languageEnglish
Article numberL071801
JournalPhysical Review Materials
Issue number7
Publication statusPublished - 26 Jul 2023

ASJC Scopus subject areas

  • General Materials Science
  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Ultrahigh supercurrent density in a two-dimensional topological material'. Together they form a unique fingerprint.

Cite this