Superconductivity and High-Pressure Performance of 2D Mo2C Crystals
KAUST DepartmentPhysical Science and Engineering (PSE) Division
KAUST Catalysis Center (KCC)
Material Science and Engineering Program
Material Science and Engineering
Chemical Science Program
Biological and Environmental Sciences and Engineering (BESE) Division
Embargo End Date2022-02-26
Permanent link to this recordhttp://hdl.handle.net/10754/667683
MetadataShow full item record
AbstractTwo-dimensional (2D) materials have attracted significant attention for their ability to support novel magneto-electrical transport and their optical and magnetic properties, of which their superconductivity is particularly of interest. Here we report on the behavior of superconductivity in 2D Mo2C crystals when hydrostatic pressure is applied, which has not yet been described in the literature. We found that the localization of boundary atoms disorder-induced Cooper pairs can suppress the superconducting transition temperature (Tc) as effectively as a magnetic field and current. We observed that the Tc initially decreased as the pressure increased to 1.75 GPa but then began to increase as the pressure increased further to 2.5 GPa. Our density functional theory calculations revealed that this behavior was linked to the modulation of the strength of the electron-phonon coupling and the electron property, which was triggered by compression of the lattice under high pressure. We attributed the inflection point in the hydrostatic pressure-dependent Tc curve to the structural phase transition of Mo2C from a hexagonal to an orthorhombic structure. This work presents a new avenue for the study of the superconductivity of Mo2C, which can be extended to apply to other 2D superconductors to modulate their electronic states.
CitationZhang, J., Cao, Z., He, X., Liu, W., Wen, Y., Cavallo, L., … Zhang, X. (2021). Superconductivity and High-Pressure Performance of 2D Mo2C Crystals. The Journal of Physical Chemistry Letters, 2219–2225. doi:10.1021/acs.jpclett.1c00071
PublisherAmerican Chemical Society (ACS)
- Magnetotransport Properties in High-Quality Ultrathin Two-Dimensional Superconducting Mo2C Crystals.
- Authors: Wang L, Xu C, Liu Z, Chen L, Ma X, Cheng HM, Ren W, Kang N
- Issue date: 2016 Apr 26
- Unique Domain Structure of Two-Dimensional α-Mo2C Superconducting Crystals.
- Authors: Liu Z, Xu C, Kang N, Wang L, Jiang Y, Du J, Liu Y, Ma XL, Cheng HM, Ren W
- Issue date: 2016 Jul 13
- Layer-Stacking, Defects, and Robust Superconductivity on the Mo-Terminated Surface of Ultrathin Mo<sub>2</sub>C Flakes Grown by CVD.
- Authors: Zhang Z, Gedeon H, Cheng Z, Xu C, Shao Z, Sun H, Li S, Cao Y, Zhang X, Bian Q, Liu L, Liu Z, Cheng HM, Ren W, Pan M
- Issue date: 2019 May 8
- Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride system.
- Authors: Drozdov AP, Eremets MI, Troyan IA, Ksenofontov V, Shylin SI
- Issue date: 2015 Sep 3
- Structure-property correlations in phase-pure B-doped Q-carbon high-temperature superconductor with a record T<sub>c</sub> = 55 K.
- Authors: Bhaumik A, Narayan J
- Issue date: 2019 May 9