Modulated Kondo screening along magnetic mirror twin boundaries in monolayer MoS2 on graphene

Abstract

A many-body resonance emerges at the Fermi energy when an electron bath screens the magnetic moment of a half-filled impurity level. This Kondo effect, originally introduced to explain the abnormal resistivity behavior in bulk magnetic alloys, has been realized in many quantum systems over the past decades, such as quantum dots, quantum point contacts, nanowires, single-molecule transistors, heavy-fermion lattices, down to adsorbed single atoms. Here we describe a unique Kondo system which allows us to experimentally resolve the spectral function consisting of impurity levels and Kondo resonance in a large Kondo temperature range, as well as their spatial modulation. Our experimental Kondo system, based on a discrete half-filled quantum confined state within a MoS2 grain boundary, in conjunction with numerical renormalization group calculations, enables us to test the predictive power of the Anderson model which is the basis of the microscopic understanding of Kondo physics.

References in corpus (9)

• The electronic properties of graphene
• The numerical renormalization group method for quantum impurity systems
• Dense network of one-dimensional mid-gap metallic modes in monolayer MoSe2 and their spatial undulations
• Orbital Picture of Yu-Shiba-Rusinov Multiplets
• Angle resolved photoemission spectroscopy reveals spin charge separation in metallic MoSe2 grain boundary
• Imaging gate-tunable Tomonaga-Luttinger liquids in 1H-MoSe${}_2$ mirror twin boundaries
• Metal-insulator transition in monolayer MoS${}_2$ via contactless chemical doping
• Manipulating Hubbard-type Coulomb blockade effect of metallic wires embedded in an insulator
• Observability of superconductivity in Sr-doped Bi2Se3 at the surface using scanning tunneling microscope

Cited by in corpus (4)

• Novel 2D vanadium sulphides: synthesis, atomic structure engineering and charge density waves
• Doped Mott phase and charge correlations in monolayer 1T-NbSe${}_2$
• Probing the spin polarization of an Anderson impurity
• On-chip quantum sensing of Kondo spins in a high-mobility quasi-one-dimensional nanoconstriction