Magnetism-driven unconventional effects in Ising superconductors: Role of proximity, tunneling, and nematicity
Darshana Wickramaratne, Menashe Haim, Maxim Khodas, I. I. Mazin
DOI 10.1103/PhysRevB.104.L060501 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Hybrid Ising superconductor-ferromagnetic insulator heterostructures provide a unique opportunity to explore the interplay between proximity-induced magnetism, spin-orbit coupling, and superconductivity. Here we use a combination of first-principles calculations of NbSe2/CrBr3 heterostructures and an analytical theory of Ising superconductivity to analyze the existing experiments and provide a complete explanation of highly nontrivial and largely counterintuitive effects: an increase in the magnitude of the superconducting gap accompanied by the broadening of the tunneling peaks; hysteretic behavior of the tunneling conductance that sets in ≈2 K below Tc; and nematic symmetry breaking in the superconducting state. The microscopic reason in all three cases appears to be the interplay between the proximity-induced exchange splitting and intrinsic defects. Finally, we predict additional interesting effects that at the moment cannot be addressed experimentally: spin-filtering when tunneling across CrBr3 and tunneling “hot spots” in momentum space that are anticorrelated with regions where the spin-orbit splitting is maximum.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NbSe2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Interplay of magnetic field and magnetic impurities in Ising superconductors
similarity 0.98Wuzhang Fang et al.
Source status unknown — claims are unverified
Strongly enlarged topological regime and enhanced superconducting gap in nanowires coupled to Ising superconductors
similarity 0.96Yingming Xie et al.
Source status unknown — claims are unverified
Superconductivity in atomically thin films: Two-dimensional critical state model
similarity 0.96Filippo Gaggioli et al.
Source status unknown — claims are unverified
Unconventional superconductivity in monolayer transition metal dichalcogenides
similarity 0.96Subhojit Roy et al.
Source status unknown — claims are unverified
Mechanisms of in-plane magnetic anisotropy in superconducting NbSe2
similarity 0.96Menashe Haim et al.
Source status unknown — claims are unverified
Multifaceted impact of a surface step on superconductivity in atomically thin films
similarity 0.95L.-F. Zhang et al.
Source status unknown — claims are unverified