Tailoring the nature and strength of electron-phonon interactions in the SrTiO${}_3$(001) two-dimensional electron liquid

Abstract

Surfaces and interfaces offer new possibilities for tailoring the many-body interactions that dominate the electrical and thermal properties of transition metal oxides. Here, we use the prototypical two-dimensional electron liquid (2DEL) at the SrTiO${}_3$(001) surface to reveal a remarkably complex evolution of electron-phonon coupling with the tunable carrier density of this system. At low density, where superconductivity is found in the analogous 2DEL at the LaAlO${}_3$/SrTiO${}_3$ interface, our angle-resolved photoemission data show replica bands separated by 100\,meV from the main bands. This is a hallmark of a coherent polaronic liquid and implies strong long-range coupling to a single longitudinal optical phonon mode. In the overdoped regime the preferential coupling to this mode decreases and the 2DEL undergoes a crossover to a more conventional metallic state with weaker short-range electron-phonon interaction. These results place constraints on the theoretical description of superconductivity and allow for a unified understanding of the transport properties in SrTiO${}_3$-based 2DELs.

References in corpus (6)

• Electric Field Control of the LaAlO${}_3$/SrTiO${}_3$ Interface Ground State
• Electron-phonon interaction and charge carrier mass enhancement in SrTiO3
• Polaronic metal state at the LaAlO3/SrTiO3 interface
• Structure and Correlation Effects in Semiconducting SrTiO${}_3$
• Diagrammatic Monte Carlo method for many-polaron problems
• Electron-phonon Coupling and the Superconducting Phase Diagram of the LaAlO3-SrTiO3 Interface

Cited by in corpus (97)

• Electron-phonon interactions from first principles
• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Physics of SrTiO${}_3$-based heterostructures and nanostructures: a review
• Origin of the crossover from polarons to Fermi liquids in transition metal oxides
• Polaronic metal state at the LaAlO3/SrTiO3 interface
• Ab initio theory of polarons: formalism and applications
• Polarons from first principles, without supercells
• Holstein polaron in a valley-degenerate two-dimensional semiconductor
• Evidence of large polarons in photoemission band mapping of the perovskite semiconductor CsPbBr${}_3$
• Phonon driven Floquet matter
• Carrier Lifetimes and Polaronic Mass Enhancement in the Hybrid Halide Perovskite CH${}_3$NH${}_3$PbI${}_3$ from Multiphonon Fröhlich Coupling
• Floquet analysis of excitations in materials
• Ubiquitous strong electron phonon coupling at the interface of FeSe/SrTiO3
• Dynamic interfacial polaron enhanced superconductivity of FeSe/SrTiO3
• Predicting charge transport in the presence of polarons: The beyond-quasiparticle regime in SrTiO${}_3$
• Emergence of Frohlich polaron from interlayer electron-phonon coupling in van der Waals heterostructure
• Strong Inter-valley Electron-Phonon Coupling in Magic-Angle Twisted Bilayer Graphene
• Polarons in two-dimensional atomic crystals
• Observation of the polaronic character of excitons in a two-dimensional semiconducting magnet $\mathrm{Cr}{\mathrm{I}}_3$
• Itinerant ferromagnetism of the Pd-terminated polar surface of PdCoO${}_2$
• Band Structure and Spin-Orbital Texture of the (111)-KTaO3 Two-Dimensional Electron Gas
• Enhanced electron-phonon interaction in multi-valley materials
• Electron phonon coupling versus photoelectron energy loss at the origin of replica bands in photoemission of FeSe on SrTiO${}_3$
• Optical Absorption Induced by Small Polaron Formation in Transition Metal Oxides -- The Case of Co${}_3$O${}_4$
• Unified approach to polarons and phonon-induced band structure renormalization
• Direct measurement of electron-phonon coupling with time-resolved ARPES
• Ab initio self-consistent many-body theory of polarons at all couplings
• Microscopic origin of the mobility enhancement at a spinel/perovskite oxide heterointerface revealed by photoemission spectroscopy
• Electron-plasmon and electron-phonon satellites in the angle-resolved photoelectron spectra of n-doped anatase TiO2
• Absence of Giant Spin Splitting in the Two-Dimensional Electron Liquid at the Surface of SrTiO${}_3$ (001)
• Two-dimensional plasmonic polarons in n-doped monolayer MoS2
• Atomically precise lateral modulation of a two-dimensional electron liquid in anatase TiO2 thin films
• Two-dimensional electron system at the magnetically tunable EuO/SrTiO${}_3$ interface
• Decoupling carrier concentration and electron-phonon coupling in oxide heterostructures observed with resonant inelastic x-ray scattering
• Quantum ferroelectric instabilities in superconducting SrTiO${}_3$
• Phonon-Dressed Two-Dimensional Carriers on the ZnO Surface
• Does a pristine, unreconstructed SrTiO${}_3$(001) surface exist?
• Is there a polaron signature in angle-resolved photoemission of CsPbBr3?
• Quantum electron liquid and its possible phase transition
• Heterostructural one-unit-cell FeSe/SrTiO3: from high-temperature superconductivity to topological states
• Orientation-dependent electron-phonon coupling in interfacial superconductors LaAlO3/KTaO3
• Band-Order Anomaly at the γ-Al2O3/SrTiO3 Interface Drives the Electron-Mobility Boost
• Observation of a two-dimensional electron gas at CaTiO${}_3$ film surfaces
• Thermally-Enhanced Fröhlich Coupling in SnSe
• Large polarons as key quasiparticles in SrTiO3 and SrTiO3-based heterostructures
• Electron-polaron dichotomy of charge carriers in perovskite oxides
• Electronic structure of few-layer black phosphorus from $\mu$-ARPES
• Temperature evolution of quasiparticle dispersion dynamics in semimetallic 1T-TiTe2 via high-resolution angle-resolved photoemission spectroscopy and ultrafast optical pump-probe spectroscopy
• Interfacial Electron-Phonon Coupling Constants Extracted from Intrinsic Replica Bands in Monolayer FeSe/SrTiO${}_3$
• Superconducting properties of a nonideal bipolaron gas
• Metal-Insulator Transition and Emergent Gapped Phase in the Surface-Doped 2D Semiconductor 2H-MoTe${}_2$
• High-density two-dimensional electron system induced by oxygen vacancies in ZnO
• Tuneable electron-magnon coupling of ferromagnetic surface states in PdCoO${}_2$
• Multipole polaron in the devil's staircase of CeSb
• The thickness dependence of quantum oscillations in ferromagnetic Weyl metal SrRuO${}_3$
• Spontaneous gap opening and potential excitonic states in an ideal Dirac semimetal Ta${}_2$Pd${}_3$Te${}_5$
• Proposal for a bulk material based on a monolayer FeSe on SrTiO3 high-temperature superconductor
• 2D surprises at the surface of 3D materials: confined electron systems in transition metal oxides
• From carriers and virtual excitons to exciton populations: Insights into time-resolved ARPES spectra from an exactly solvable model
• Two-dimensional electron systems in ATiO3 perovskites (A = Ca, Ba, Sr): control of orbital hybridization and order
• Long living carriers in a strong electron-phonon interacting two-dimensional doped semiconductor
• Identification of large polarons and exciton polarons in rutile and anatase polymorphs of titanium dioxide
• Tunable two-dimensional electron system at the (110) surface of SnO${}_2$
• Plasmons at the LaAlO${}_3$/SrTiO${}_3$ interface and Graphene-LaAlO${}_3$/SrTiO${}_3$ double layer
• Electron-plasmon interaction induced plasmonic-polaron band replication in epitaxial perovskite SrIrO${}_3$ films
• Phonon-assisted damping of plasmons in three- and two-dimensional metals
• Engineering ultra-strong electron-phonon coupling and nonclassical electron transport in crystalline gold with nanoscale interfaces
• Observation of Wannier-Stark localization at the surface of BaTiO${}_3$ films by photoemission
• Electronic structure of SrTi${}_{1-x}$V${}_x$O${}_3$ films studied by $insitu$ photoemission spectroscopy: Screening for a transparent electrode material
• Isostructural Metal-Insulator Transition Driven by Dimensional-Crossover in SrIrO3 Heterostructures
• Single spin-polarised Fermi surface in SrTiO${}_3$ thin films
• $d_{xz/yz}$ Orbital Subband Structures and Chiral Orbital Angular Momentum in the (001) Surface States of SrTiO${}_3$
• Manifestations of the electron-phonon interaction range in angle resolved photoemission spectra
• Artificial quantum confinement in LAO3/STO heterostructure
• Nonperturbative self-consistent electron-phonon spectral functions and transport
• Domes of $T_c$ in single-band and multiband superconductors with finite-range attractive interactions
• Direct observation of two-dimensional small polarons at correlated oxide interface
• Ground state features and spectral properties of large polaron liquids from low to high charge densities
• Electronic phase diagram of Cr-doped VO2 epitaxial films studied by in situ photoemission spectroscopy
• Imaging Se diffusion across the FeSe/SrTiO${}_3$ interface
• A Laser-ARPES View of the 2D Electron Systems at LaAlO3/SrTiO3 and Al/SrTiO3 Interfaces
• Cooling a polaronic liquid: Phase mixture and pseudogap-like spectra in superconducting $B{a}_{1-x}{K}_{x}Bi{O}_3$
• Duality and degeneracy lifting in two-dimensional electron liquids on SrTiO${}_3$(001)
• Band-selective Plasmonic Polaron in Thermoelectric Semimetal Ta${}_2$PdSe${}_6$ with ultra-high power factor
• Electronic spin susceptibility in metallic strontium titanate
• Dichotomy of electron-phonon interactions in the delafossite PdCoO${}_2$: From weak bulk to polaronic surface coupling
• Beyond-quasiparticle transport with vertex correction: self-consistent ladder formalism for electron-phonon interactions
• Observation of quasi-steady dark excitons and gap phase in a doped semiconductor
• Two-dimensional conducting layer on SrTiO${}_3$ surface induced by hydrogenation
• Many-body calculations of plasmon and phonon satellites in angle-resolved photoelectron spectra using the cumulant expansion approach
• Three-dimensionality of mobile electrons at X-ray-irradiated LaAlO${}_3$/SrTiO${}_3$ interfaces
• Symmetry-protected topological polarons
• Interfacial Polarons Driven by Charge Transfer In WSe2/Cuprate Superconductor Systems
• Many-body Green's function approaches to the doped Fröhlich solid: Exact solutions and anomalous mass enhancement
• Orientation-dependent superconductivity and electronic structure of the rare-earth metal/KTaO3 interfaces
• A two-dimensional electron gas at the (001) surface of ferromagnetic EuTiO${}_3$(001)
• Going Beyond the Cumulant Approximation: Power Series Correction to Single Particle Green's Function in Holstein System