Observation of electrically tunable Feshbach resonances in twisted bilayer semiconductors
arXiv:2105.03997 · doi:10.1126/science.abj3831
Abstract
Moire superlattices in twisted transition metal dichalcogenide bilayers have emerged as a rich platform for exploring strong correlations using optical spectroscopy. Despite observation of rich Mott-Wigner physics stemming from an interplay between the periodic potential and Coulomb interactions, the absence of tunnel coupling induced hybridization of electronic states ensured a classical layer degree of freedom in these experiments. Here, we investigate a MoSe homobilayer structure where inter-layer coherent tunnelling and layer-selective optical transitions allow for electric field controlled manipulation and measurement of the layer-pseudospin of the ground-state holes. A striking example of qualitatively new phenomena in this system is our observation of an electrically tunable 2D Feshbach resonance in exciton-hole scattering, which allows us to control the strength of interactions between excitons and holes located in different layers. Our findings enable hitherto unexplored possibilities for optical investigation of many-body physics, as well as realization of degenerate Bose-Fermi mixtures with tunable interactions, without directly exposing the itinerant fermions to light fields.
arXiv commentMain text: 9 pages, 4 figures; Supplementary Material: 9 pages, 7 figures
References in corpus (27)
- Many-Body Physics with Ultracold Gases
- Correlated Insulator Behaviour at Half-Filling in Magic Angle Graphene Superlattices
- Feshbach Resonances in Ultracold Gases
- Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene
- Observation of resonance condensation of fermionic atom pairs
- Superconductors, Orbital Magnets, and Correlated States in Magic Angle Bilayer Graphene
- Condensation of Pairs of Fermionic Atoms Near a Feshbach Resonance
- Optical detection of Mott and generalized Wigner crystal states in WSe2/WS2 moiré superlattices
- Magic continuum in twisted bilayer WSe2
- Experimental Study of the BEC-BCS Crossover Region in Lithium 6
- Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
- Spin-polarized Correlated Insulator and Superconductor in Twisted Double Bilayer Graphene
- Fermi polaron-polaritons in charge-tunable atomically thin semiconductors
- Metastability and Coherence of Repulsive Polarons in a Strongly Interacting Fermi Mixture
- Interatomic collisions in a tightly confined Bose gas
- Moiré superlattice in a MoSe/hBN/MoSe heterostructure: from coherent coupling of inter- and intra-layer excitons to correlated Mott-like states of electrons
- Normal state of highly polarized Fermi gases: simple many-body approaches
- Many-Body Theory of Trion Absorption Features in Two-Dimensional Semiconductors
- Universal many-body response of heavy impurities coupled to a Fermi sea
- Fermi polarons in two dimensions
- Polaritonic Feshbach Resonance
- Giant magnetic field from moiré induced Berry phase in homobilayer semiconductors
- Electronic structures, charge transfer and charge orders in twisted transition metal dichalcogenide bilayers
- Optically Probing Spin and Charge Interactions in an Tunable Artificial Molecule
- Charge Transfer Excitations, Pair Density Waves, and Superconductivity in Moiré Materials
- Optical signatures of charge order in a Mott-Wigner state
- Tunable Feshbach resonances and their spectral signatures in bilayer semiconductors
Cited by in corpus (32)
- Exciton-polaron interactions in monolayer WS
- Topological superconductivity in doped magnetic moiré semiconductors
- Observation of Rydberg moiré excitons
- Chiral Pseudo Spin Liquids in Moire Heterostructures
- Tunable Feshbach resonances and their spectral signatures in bilayer semiconductors
- Realizing Topological Superconductivity in Tunable Bose-Fermi Mixtures with Transition Metal Dichalcogenide Heterostructures
- Confined Trions and Mott-Wigner States in a Purely Electrostatic Moiré Potential
- Light-induced topological superconductivity in transition metal dichalcogenide monolayers
- Crossover from exciton polarons to trions in doped two-dimensional semiconductors at finite temperature
- Polaron spectroscopy of interacting Fermi systems: insights from exact diagonalization
- Collective flow of fermionic impurities immersed in a Bose-Einstein Condensate
- Theory of intervalley-coherent AFM order and topological superconductivity in tWSe
- Polaritons in an electron gas -- quasiparticles and Landau effective interactions
- Exciton-exciton Interaction in Monolayer MoSe from Mutual Screening of Coulomb Binding
- The Fate of the Upper Polariton: Breakdown of the Quasiparticle Picture in the Continuum
- Feshbach hypothesis of high-Tc superconductivity in cuprates
- Electrically tunable layer-hybridized trions in doped WSe bilayers
- Exciton interacting with a moiré lattice: Polarons, strings, and optical probing of spin correlations
- Scattering theory of mesons in doped antiferromagnetic Mott insulators: Multichannel perspective and Feshbach resonance
- Atomic interactions for qubit-error compensations
- Boson-fermion pairing and condensation in two-dimensional Bose-Fermi mixtures
- Feshbach Resonances in Exciton-Charge-Carrier Scattering in Semiconductor Bilayers
- Accelerating analysis of Boltzmann equations using Gaussian mixture models: Application to quantum Bose-Fermi mixtures
- Many-Body Entanglement in Solid-State Emitters
- Exciton fractional Chern insulators in moiré heterostructures
- Tuning transport in solid-state Bose-Fermi mixtures by Feshbach resonances
- Multiple polaron quasiparticles with dipolar fermions in a bilayer geometry
- Controllable fusion of electromagnetic bosons in two-dimensional semiconductors
- Optical properties of Fermi polarons in a GaInP/MoSe2 monolayer heterostructure
- Room-temperature tuning and probing of Fermi polarons in atomically thin semiconductors on a plasmonic metasurface
- Probing spatially resolved spin density correlations with trapped excitons
- Emergent spinon-holon Feshbach resonance in a doped Majumdar-Ghosh model