Direct characterization of photo-induced lattice dynamics in BaFe2As2

Abstract

Ultrafast light pulses can modify the electronic properties of quantum materials by perturbing the underlying, intertwined degrees of freedom. In particular, iron-based superconductors exhibit a strong coupling among electronic nematic fluctuations, spins, and the lattice, serving as a playground for ultrafast manipulation. Here we use time-resolved x-ray scattering to measure the lattice dynamics of photo-excited BaFe2As2. Upon optical excitation, no signature of an ultrafast change of the crystal symmetry is observed, but the lattice oscillates rapidly in time due to the coherent excitation of an A1g mode that modulates the Fe-As-Fe bond angle. We directly quantify the coherent lattice dynamics and show that even a small photo-induced lattice distortion can induce notable changes in the electronic and magnetic properties. Our analysis implies that transient structural modification can generally be an effective tool for manipulating the electronic properties of multi-orbital systems, where electronic instabilities are sensitive to the orbital character of bands near the Fermi level.

References in corpus (29)

• Complexity in Strongly Correlated Electronic Systems
• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• High-temperature superconductivity in iron-based materials
• Nematic order in iron superconductors - who is in the driver's seat?
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
• Pnictogen height as a possible switch between high-T_c nodeless and low-T_c nodal pairings in the iron based superconductors
• Divergent nematic susceptibility in an iron arsenide superconductor
• Symmetry breaking orbital anisotropy on detwinned Ba(Fe1-xCox)2As2 above the spin density wave transition
• Anomalous suppression of the orthorhombic distortion in superconducting Ba[Fe(1-x)Cox]2As2
• Pressure-induced volume-collapsed tetragonal phase of CaFe2As2 as seen via neutron scattering
• Comparison of Ab initio Low-Energy Models for LaFePO, LaFeAsO, BaFe2As2, LiFeAs, FeSe and FeTe: Electron Correlation and Covalency
• Similarities between structural distortions under pressure and chemical doping in superconducting BaFe2As2
• Critical change in the Fermi surface of iron arsenic superconductors at the onset of superconductivity
• Observation of Temperature-Induced Crossover to an Orbital-Selective Mott Phase in A${}_x$Fe${}_{2-y}$Se${}_2$ (A=K, Rb) Superconductors
• Spin fluctuations and superconductivity in a 3D tight-binding model for BaFe2As2
• Bandwidth and Fermi surface of Iron-Oxypnictides: covalency and sensitivity to structural changes
• Ultrafast transient generation of spin-densitywave order in the normal state of BaFe2As2 driven by coherent lattice vibrations
• Nematic susceptibility of hole- and electron-doped BaFe2As2 iron-based superconductors from shear modulus measurements
• Character of the structural and magnetic phase transitions in the parent and electron doped BaFe2As2 compounds
• Importance of Fermi surface topology for high temperature superconductivity in electron-doped iron arsenic superconductors
• Phonon anomalies in pure and underdoped R{1-x}K{x}Fe{2}As{2} (R = Ba, Sr) investigated by Raman light scattering
• Ultrafast modulation of the chemical potential in BaFe${}_2$As${}_2$ by coherent phonons
• Ultrafast structural dynamics of the Fe-pnictide parent compound BaFe2As2
• Coherent excitations and electron phonon coupling in Ba/EuFe_2As_2 compounds investigated by femtosecond time- and angle-resolved photoemission spectroscopy
• Dynamic competition between spin density wave order and superconductivity in underdoped $B{a}_{1-x}{K}_{x}F{e}_{2}A{s}_2$
• Tunneling spectroscopy for probing orbital anisotropy in iron pnictides

Cited by in corpus (23)

• Nonthermal pathways to ultrafast control in quantum materials
• Photo-induced semimetallic states realised in electron-hole coupled insulators
• Photo-induced Superconducting State with Long-lived Disproportionate Band Filling in FeSe
• Mode-selective coupling of coherent phonons to the Bi2212 electronic band structure
• Strong spin-phonon coupling unveiled by coherent phonon oscillations in Ca2RuO4
• Antiphase Fermi-surface modulations accompanying displacement excitation in a parent compound of iron-based superconductors
• Using Nonequilibrium Dynamics to Probe Competing Orders in a Mott-Peierls System
• Observing photo-induced chiral edge states of graphene nanoribbons in pump-probe spectroscopies
• Ultrafast destruction and recovery of the spin density wave order in iron based pnictides: a multi-pulse optical study
• Abnormal $phase$ flip in coherent phonon oscillations of Ca${}_2$RuO${}_4$
• Experimental Determination of the Fermi Surface of Sr3Ir4Sn13
• A Microscopic Description of Displacive Coherent Phonons
• Disentangling charge and structural contributions during coherent atomic motions studied by ultrafast resonant x-ray diffraction
• Anomalous magneto-elastic coupling in Au-doped BaFe2As2
• Ultrafast Melting of Spin Density Wave Order in BaFe${}_2$As${}_2$ Observed by Time- and Angle-Resolved Photoemission Spectroscopy with Extreme-Ultraviolet Higher Harmonic Generation
• Magneto-elastic coupling in Fe-based superconductors
• Nematic response revealed by coherent phonon oscillations in BaFe${}_2$As${}_2$
• Ultrafast dynamics in the Lifshitz-type 5$d$ pyrochlore antiferromagnet Cd${}_2$Os${}_2$O${}_7$
• Transient gap generation in BaFe${}_2$As${}_2$ driven by coherent lattice vibrations
• Analysis methodology of coherent oscillations in time- and angle-resolved photoemission spectroscopy
• Probing superconductivity and pairing symmetry by coherent phonons in multiorbital superconductors
• Time-Resolved Photoemission Spectroscopy of Quantum Materials Using High Harmonic Generation: Probing Electron-Phonon Interactions and Non-Equilibrium Dynamics
• Phase separation in iron chalcogenide superconductor Rb0.8+xFe1.6+ySe2 as seen by Raman light scattering and band structure calculations