Interface induced Zeeman-protected superconductivity in ultrathin crystalline lead films

Abstract

Two dimensional (2D) superconducting systems are of great importance to exploring exotic quantum physics. Recent development of fabrication techniques stimulates the studies of high quality single crystalline 2D superconductors, where intrinsic properties give rise to unprecedented physical phenomena. Here we report the observation of Zeeman-type spin-orbit interaction protected superconductivity (Zeeman-protected superconductivity) in 4 monolayer (ML) to 6 ML crystalline Pb films grown on striped incommensurate (SIC) Pb layers on Si(111) substrates by molecular beam epitaxy (MBE). Anomalous large in-plane critical field far beyond the Pauli limit is detected, which can be attributed to the Zeeman-protected superconductivity due to the in-plane inversion symmetry breaking at the interface. Our work demonstrates that in superconducting heterostructures the interface can induce Zeeman-type spin-orbit interaction (SOI) and modulate the superconductivity.

References in corpus (12)

• Interface induced high temperature superconductivity in single unit-cell FeSe films on SrTiO3
• Evidence of Ising pairing in superconducting NbSe${}_2$ atomic layers
• Two Dimensional Ising Superconductivity in Gated MoS${}_2$
• Superconductivity protected by spin-valley locking in ion-gated MoS2
• Highly crystalline 2D superconductors
• Direct observation of high temperature superconductivity in one-unit-cell FeSe films
• Ising Superconductivity and Quantum Phase Transition in Macro-Size Monolayer NbSe2
• Hard Superconductivity of a Soft Metal in the Quantum Regime
• Macroscopic Superconducting Current through a Silicon Surface Reconstruction with Indium Adatoms: Si(111)-(R7$\times$R3)-In
• Remarkable effects of disorder on superconductivity of single atomic layers of lead on silicon
• Detection of a superconducting phase in a two-atom layer of hexagonal Ga film grown on semiconducting GaN(0001)
• Spin-orbit coupling effects on the stability of two competing structures in Pb/Si(111) and Pb/Ge(111)

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