Transient gap generation in BaFeAs driven by coherent lattice vibrations
arXiv:2212.03337 · doi:10.1093/pnasnexus/pgad164
Abstract
The electronic structure and the magnetic properties of iron-based superconductors are highly sensitive to the pnictogen height. Coherent excitation of the phonon by femtosecond laser directly modulates the pnictogen height, which has been used to control the physical properties of iron-based superconductors. Previous studies show that the driven phonon resulted in a transient increase of the pnictogen height in BaFeAs, favoring an enhanced Fe magnetic moment. Here, we use time-resolved broadband terahertz spectroscopy to investigate the dynamics of BaFeAs in the phonon driven state. Below the spin-density wave (SDW) transition temperature, we observe a transient gap generation at early time delays. A similar transient feature is observed in the normal state up to room temperature.
arXiv comment6 pages, 4 figures
References in corpus (30)
- Nematic order in iron superconductors - who is in the driver's seat?
- Kinetic frustration and the nature of the magnetic and paramagnetic states in iron pnictides and iron chalcogenides
- Ultrafast switching to a stable hidden topologically protected quantum state in an electronic crystal
- Pnictogen height as a possible switch between high-T_c nodeless and low-T_c nodal pairings in the iron based superconductors
- Effect of Structural Parameters on Superconductivity in Fluorine-Free LnFeAsO1-y (Ln=La,Nd)
- Symmetry breaking orbital anisotropy on detwinned Ba(Fe1-xCox)2As2 above the spin density wave transition
- Terahertz-Field-Induced Ferroelectricity in Quantum Paraelectric SrTiO
- Ironing out the details of unconventional superconductivity
- Magnetism and Charge Dynamics in Iron Pnictides
- Origin of the spin density wave instability in AFeAs (A=Ba, Sr) as revealed by optical spectroscopy
- Ultrafast transient generation of spin-densitywave order in the normal state of BaFe2As2 driven by coherent lattice vibrations
- Cooperative photoinduced metastable phase control in strained manganite films
- Possible superconductivity above 25 K in single crystalline Co-doped BaFeAs
- Ultrafast transient response and electron-phonon coupling in the iron-pnictide superconductor Ba(Fe(1-x)Co(x))2As2
- Raman scattering study of (KSr)FeAs ( = 0.0, 0.4)
- Momentum dependent ultrafast electron dynamics in antiferromagnetic EuFe2As2
- 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 BaFeAs by coherent phonons
- Lattice and electronic anomalies of CaFe_2As_2 studied by Raman spectroscopy
- Coherent excitations and electron phonon coupling in Ba/EuFe_2As_2 compounds investigated by femtosecond time- and angle-resolved photoemission spectroscopy
- Ultrafast structural dynamics of the Fe-pnictide parent compound BaFe2As2
- Dynamic competition between spin density wave order and superconductivity in underdoped
- Raman scattering study of Spin-Density-Wave order and electron-phonon coupling in Ba(FeCo)As
- Detailed band structure of twinned and detwinned BaFeAs studied with angle-resolved photoemission spectroscopy
- Direct characterization of photo-induced lattice dynamics in BaFe2As2
- Measurement of the c-axis optical reflectance of AFeAs (A=Ba, Sr) single crystals: Evidence of different mechanisms for the formation of two energy gaps
- Antiphase Fermi-surface modulations accompanying displacement excitation in a parent compound of iron-based superconductors
- Spectrally-resolved femtosecond reflectivity relaxation dynamics in undoped SDW 122-structure iron based pnictides
- Vibrational anomalies in AFeAs (ACa, Sr, and Ba) single crystals
- Nematic response revealed by coherent phonon oscillations in BaFeAs