Nonlinear Hall effect and potential Ising superconductivity in monolayer MXene heterostructure of T−Mo2C/H−Mo2C
Ning-Ning Zhao, Zhen-Feng Ouyang, Pei-Han Sun, Jian-Feng Zhang, Kai Liu, Zhong-Yi Lu
DOI 10.1103/PhysRevB.108.035140 · Physical Review B
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Abstract
The Berry curvature dipole (BCD) induced nonlinear Hall effect can appear in a material with time-reversal symmetry but breaking space-inversion symmetry. Meanwhile, a two-dimensional (2D) noncentrosymmetric superconducting material can host exotic Ising pairing that leads to an upper critical magnetic field far exceeding the Pauli paramagnetic limit. Based on first-principles electronic structure calculations and theoretical analysis, we demonstrate that the large BCDs and the Ising superconductivity can coexist in the monolayer MXene heterostructures of T−Mo2C/H−Mo2C. The large BCDs are generated by the multiple band anticrossings and the band inversions near the Fermi level. The breaking of in-plane space-inversion symmetry in these 2D superconducting heterostructures can induce an Ising-type spin-orbit coupling. Additionally, one of the superconducting heterostructures is identified as a Z2 topological metal. Our work suggests that the T−Mo2C/H−Mo2C heterostructures may serve as a promising platform to explore the nonlinear Hall effect and potential Ising superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Mo2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | unknown |
| Mo2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | Pressure not reported | unknown |
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