Novel two-dimensional Nb$_2$C MXene for highest-Tc superconductivity
Superconductivity in two-dimensional (2D) materials is a hot topic of research today owing to their promising technological applications. The present work reports superconductivity in a new 2D Nb$_2$C MXene with highest critical temperature of 12.5 K attained till now. We have synthesized two-dimensional Nb$_2$C MXene from its Nb$_2$AlC MAX phase after systematically optimizing the chemical etching process. The X-ray diffraction showed a clear (002) peak indicating the successful formation of MXene as well as a significant increase in the c-lattice parameter from 13.83{\AA} to 22.72{\AA} which is indicated as the delamination of Nb$_2$C MXene sheet as was evident from the morphological study using scanning electron microscopy. The magnetic measurement was done using superconducting quantum interference device (SQUID). The ZFC-FC measurements show a clear transition from normal state to the superconducting state at the superconducting onset transition temperature Tconset (K) ~ 12.5 K. The M-H loops at low temperature show significant broadening that indicate better connectivity of the superconducting grains. The experimental Hc1, Hc2 vs. Temperature fits well in accordance with the Ginzburg-Landau (GL) theory indicating the superconducting nature of our Nb$_2$C MXene. The reasons for existence of highest Tc in our Nb$_2$C MXene is the presence of strong-electron phonon interaction and the large density of states above Fermi level. The present work is a significant advancement in the field of two-dimensional superconductivity which opens up new door towards the research and potential applications of two-dimensional MXene.
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Zaheer Ud Din Babar (edit)
M. S. Anwar (edit)
Muhammad Mumtaz (edit)
Mudassir Iqbal (edit)
Ren-Kui Zheng (add twitter)
Deji Akinwande (add twitter)
Syed Rizwan (edit)
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08/12/19 06:04PM
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tjmlab: Novel two-dimensional Nb2C MXene for highest-Tc superconductivity Tc=12.5Kに達する新しい2次元超伝導物質の発見! https://t.co/4Z1gBayg0l
CondensedPapers: Novel two-dimensional Nb$_2$C MXene for highest-Tc superconductivity. https://t.co/LAZMVtowD1
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