Addressing the spin-valley flavors in moir'e mini-bands of MoS2
arXiv:2304.03316 · doi:10.1103/PhysRevB.109.195106
Abstract
The physics of moir'e superlattices and the resulting formation of mini-bands in van der Waals materials have opened up an exciting new field in condensed matter physics. These systems exhibit a rich phase diagram of novel physical phenomena and exotic correlated phases that emerge in the low-dispersing bands. Transition metal dichalcogenides, in particular, molybdenum disulfide (MoS2), are potential candidates to extend the studies on moir'e electronics beyond graphene. Our transport spectroscopy measurements and analysis reveal a correlation-driven phase transition and the emergence of discrete mini-bands in MoS2 moir'e superlattices that remained elusive so far. We resolve these mini-bands arising from quantum mechanical tunneling through Schottky barriers between the MoS2 and its metallic leads. Energy scales deduced from a first approach exhibit an astounding agreement with our experimental observations. The behavior under thermal activation suggests a Lifshitz phase transition at low temperatures that is driven by a complete spin-valley symmetry breaking. These intriguing observations bring out the potential of twisted MoS2 to explore correlated electron states and associated physics.
References in corpus (31)
- Atomically thin MoS2: A new direct-gap semiconductor
- Magic-angle graphene superlattices: a new platform for unconventional superconductivity
- Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
- Moire bands in twisted double-layer graphene
- Tuning superconductivity in twisted bilayer graphene
- Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene
- Graphene bilayer with a twist: electronic structure
- Intrinsic quantized anomalous Hall effect in a moiré heterostructure
- Magic continuum in twisted bilayer WSe2
- Hubbard model physics in transition metal dichalcogenide moiré bands
- Electric Field Tunable Correlated States and Magnetic Phase Transitions in Twisted Bilayer-Bilayer Graphene
- Spin-polarized Correlated Insulator and Superconductor in Twisted Double Bilayer Graphene
- Lattice relaxation and energy band modulation in twisted bilayer graphenes
- Maximally-localized Wannier orbitals and the extended Hubbard model for the twisted bilayer graphene
- Ultraflat bands and shear solitons in Moiré patterns of twisted bilayer transition metal dichalcogenides
- Cascade of electronic transitions in magic-angle twisted bilayer graphene
- Cascade of Phase Transitions and Dirac Revivals in Magic Angle Graphene
- Isospin magnetism and spin-triplet superconductivity in Bernal bilayer graphene
- Magnetoelectric effects and valley controlled spin quantum gates in transition metal dichalcogenide bilayers
- Effective lattice Hamiltonian for monolayer MoS2 : Tailoring electronic structure with perpendicular electric and magnetic fields
- Band topology, Hubbard model, Heisenberg model, and Dzyaloshinskii-Moriya interaction in twisted bilayer WSe
- Spontaneous symmetry breaking and Lifshitz transition in bilayer graphene
- Cascade of isospin phase transitions in Bernal bilayer graphene at zero magnetic field
- Quantum textures of the many-body wavefunctions in magic-angle graphene
- Controlling interlayer excitons in MoS2 layers grown by chemical vapor deposition
- Optical conductivity, Drude weight and plasmons in twisted graphene bilayers
- Origin and Evolution of Ultraflatbands in Twisted Bilayer Transition Metal Dichalcogenides: Realization of Triangular Quantum Dot Array
- Phonons in Twisted Transition Metal Dichalcogenide Bilayers ("Twistnonics"): Ultra-soft Phasons, and a transition from Superlubric to Pinned Phase
- Accurate force-field methodology capturing atomic reconstructions in transition metal dichalcogenide moiré systems
- Ising superconductivity induced from spin-selective valley symmetry breaking in twisted trilayer graphene
- Mechanism for Negative Differential Conductivity in Holographic Conductors