@article{5d8e36a674cb43fd827e759e231aa2b4,
title = "Ultrahigh supercurrent density in a two-dimensional topological material",
abstract = "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.",
author = "Qi Zhang and Hossain, {Md Shafayat} and Brian Casas and Wenkai Zheng and Cheng, {Zi Jia} and Zhuangchai Lai and Tu, {Yi Hsin} and Guoqing Chang and Yao Yao and Siyuan Li and Jiang, {Yu Xiao} and Sougata Mardanya and Chang, {Tay Rong} and You, {Jing Yang} and Feng, {Yuan Ping} and Guangming Cheng and Yin, {Jia Xin} and Nana Shumiya and Cochran, {Tyler A.} and Yang, {Xian P.} and Maksim Litskevich and Nan Yao and Kenji Watanabe and Takashi Taniguchi and Hua Zhang and Luis Balicas and Hasan, {M. Zahid}",
note = "Funding Information: Experimental and theoretical work at Princeton University was supported by the Gordon and Betty Moore Foundation (Grant No. GBMF4547; M.Z.H.). The material characterization is supported by the United States Department of Energy (US DOE) under the Basic Energy Sciences (BES) program (Grant No. DOE/BES DE-FG-288 02-05ER46200). L.B. is supported by the DOE-BES (Grant No. DE-SC0002613). The National High Magnetic Field Laboratory acknowledges support from a US-NSF Cooperative Agreement (Grant No. DMR-1644779) and the state of Florida. The authors acknowledge the sample characterization of the Imaging and Analysis Center at Princeton University, supported in part by the Princeton Center for Complex Materials and the NSF-MRSEC program (Grant No. DMR-2011750). G. C. acknowledges the support of the National Research Foundation, Singapore, under its Fellowship Award (Grant No. NRF-NRFF13-2021-0010) and the Nanyang Assistant Professorship grant from Nanyang Technological University. J.Y.Y. and Y.P.F. are supported by the Ministry of Education, Singapore, under its MOE AcRF Tier 3 Award (Grant No. MOE2018-T3-1-002). H.Z. acknowledges the support from the Science Technology and Innovation Committee of Shenzhen Municipality (Grant No. JCYJ20200109143412311), the Research Grants Council of Hong Kong (Grant No. AoE/P-701/20), the Start-Up Grant (Project No. 9380100), the grant from the City University of Hong Kong (Project No. 1886921), and the support from ITC via the Hong Kong Branch of National Precious Metals Material Engineering Research Center. K.W. and T.T. acknowledge support from JSPS KAKENHI (Grants No. 19H05790, No. 20H00354, and No. 21H05233). T.-R.C. was supported by the 2030 Cross-Generation Young Scholars Program from the National Science and Technology Council (NSTC) in Taiwan (Program No. MOST111-2628-M-006-003-MY3), National Cheng Kung University (NCKU, Taiwan) and National Center for Theoretical Sciences (Taiwan) and Higher Education Sprout Project, Ministry of Education to the Headquarters of University Advancement at NCKU. Publisher Copyright: {\textcopyright} 2023 American Physical Society.",
year = "2023",
month = jul,
doi = "10.1103/PhysRevMaterials.7.L071801",
language = "English (US)",
volume = "7",
journal = "Physical Review Materials",
issn = "2475-9953",
publisher = "American Physical Society",
number = "7",
}