Elasto-Raman scattering: arsenic optical phonon as a probe of nematicity in BaFe${}_2$As${}_2$

Abstract

We report a Raman scattering study of nematic degrees of freedom in the iron-based superconductor parent compound BaFe${}_2$As${}_2$ under tunable uniaxial strain. We demonstrate that the polarization resolved arsenic (As) phonon intensity can be used to monitor the nematic order parameter as a function of both temperature and strain. At low temperature in the nematic ordered phase we use it to track the continuous and reversible orientation of nematic domains under variable strain. At higher temperature, the evolution of the As phonon intensity under strain reflects an enhanced nematic susceptibility close to the nematic transition $T_S$. Its temperature dependence under strong strain follows qualitatively the expected behavior of an Ising order parameter under a symmetry breaking field. Our elasto-Raman study illustrates the interest of combining selective anisotropic strain with a symmetry resolved probe like Raman scattering. Elasto-Raman scattering can be applied to a wide variety of quantum materials where uniaxial strain tunes electronic orders.

arXiv comment14 pages (including appendix), 11 figures

References in corpus (47)

• 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
• 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)
• Divergent nematic susceptibility in an iron arsenide superconductor
• Effects of nematic fluctuations on the elastic properties of iron arsenide superconductors
• Ubiquitous signatures of nematic quantum criticality in optimally doped Fe-based superconductors
• Strong Peak in $T_c$ of Sr${}_2$RuO${}_4$ Under Uniaxial Pressure
• The Unprecedented Giant Coupling of Fe-spin State and the As-As Hybridization in Iron-Pnictide
• Nematic quantum critical point without magnetism in FeSe1-xSx superconductors
• Structural quantum criticality and superconductivity in iron-based superconductor Ba(Fe1-xCox)2As2
• Piezoelectric-based apparatus for strain tuning
• Observation of incipient charge nematicity in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Nematic susceptibility of hole- and electron-doped BaFe2As2 iron-based superconductors from shear modulus measurements
• Electronic nematic susceptibility of iron-based superconductors
• Charge Nematicity and Electronic Raman Scattering in Iron-based Superconductors
• Effect of uniaxial strain on the structural and magnetic phase transitions in BaFe${}_2$As${}_2$
• Charge induced nematicity in FeSe
• Measurement of the elastoresistivity coefficients of the underdoped iron-arsenide Ba(Fe${}_{0.975}$Co${}_{0.025}$)${}_2$As${}_2$
• Doping dependence of the lattice dynamics in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ studied by Raman spectroscopy
• Critical Quadrupole Fluctuations and Collective Modes in Iron Pnictide Superconductors
• Nematic fluctuations and the magneto-structural phase transition in $\mathrm{Ba}(\mathrm{F}{\mathrm{e}}_{1-\mathrm{x}}\mathrm{C}{\mathrm{o}}_{\mathrm{x}}{)}_2\mathrm{A}{\mathrm{s}}_2$
• Phonon anomalies in pure and underdoped R{1-x}K{x}Fe{2}As{2} (R = Ba, Sr) investigated by Raman light scattering
• Momentum Dependence of the Nematic Order Parameter in Iron-Based Superconductors
• Drastic suppression of superconducting $T_c$ by anisotropic strain near a nematic quantum critical point
• Uniaxial strain control of spin-polarization in multicomponent nematic order of BaFe${}_2$As${}_2$
• Raman scattering study of Spin-Density-Wave order and electron-phonon coupling in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Origin of the resistive anisotropy in the electronic nematic phase of BaFe${}_2$As${}_2$ revealed by optical spectroscopy
• Symmetric and antisymmetric strain as continuous tuning parameters for electronic nematic order
• Nematic quantum criticality in an Fe-based superconductor revealed by strain-tuning
• Impact of Uniaxial Pressure on Structural and Magnetic Phase Transitions in Electron-Doped Iron Pnictides
• The relationship between transport anisotropy and nematicity in FeSe
• Elastocaloric signature of nematic fluctuations
• Transverse fields to tune an Ising-nematic quantum critical transition
• Anomalous electron-phonon interaction in doped LaOFeAs: a First Principles calculation
• The transport-structural correspondence across the nematic phase transition probed by elasto-x-ray diffraction
• Nematic crossover in BaFe${}_2$As${}_2$ under uniaxial stress
• Uniaxial pressure effect on the magnetic ordered moment and transition temperatures in BaFe${}_{2-x}{T}_x$As${}_2$ ($T=$Co, Ni)
• Interplay of lattice, electronic and spin degrees of freedom in detwinned BaFe${}_2$As${}_2$: a Raman scattering study
• Diverse fluctuations and anisotropic Gr{\" u}neisen parameter behavior in iron-based superconductor Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ and their correlation with superconductivity
• Coupling of the A_{1g} As-phonon to magnetism in iron pnictides
• Elastoresistive and Elastocaloric Anomalies at Magnetic and Electronic-Nematic Critical Points
• Effect of uniaxial pressure on the magneto-structural transitions of iron arsenide superconductors
• Nuclear Magnetic Resonance Probe Head Design for Precision Strain Control
• Anomalous magneto-elastic coupling in Au-doped BaFe2As2
• Strain-derivative of thermoelectric properties: a sensitive probe for nematicity
• Magneto-elastic coupling in Fe-based superconductors

Cited by in corpus (1)

• Nematic fluctuations mediated superconductivity revealed by anisotropic strain in Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$