Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Nematic fluctuations and phase transitions in LaFeAsO: A Raman scattering study

Journal Article · · Physical Review B
 [1];  [2];  [3];  [4];  [5];  [1];  [5];  [1]
  1. Univ. of Campinas-UNICAMP, Sao Paulo (Brazil)
  2. Univ. of Campinas-UNICAMP, Sao Paulo (Brazil); Federal Univ. of Goias-UFG, Goias (Brazil)
  3. Federal Univ. of ABC-UFABC, Sao Paulo (Brazil)
  4. Ames Lab., Ames, IA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
+ Show Author Affiliations
Raman scattering experiments on LaFeAsO with distinct antiferromagnetic (TAFM=140 K) and tetragonal-orthorhombic (TS=155 K) transitions show a quasielastic peak (QEP) in B2g symmetry (2 Fe tetragonal cell) that fades away below ~TAFM and is ascribed to electronic nematic fluctuations. A scaling of the reported shear modulus with the T dependence of the QEP height rather than the QEP area indicates that magnetic degrees of freedom drive the structural transition. As a result, the large separation between TS and TAFM in LaFeAsO compared to BaFe2As2 manifests itself in slower dynamics of nematic fluctuations in the former.
Research Organization:
Ames Lab. (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1374745
Alternate ID(s):
OSTI ID: 1369090
Report Number(s):
IS-J--9405
Journal Information:
Physical Review B, Journal Name: Physical Review B Journal Issue: 1 Vol. 96; ISSN 2469-9950; ISSN PRBMDO
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (45)

Superconductivity and fluctuations in Ba 1- p K p Fe 2 As 2 and Ba(Fe 1- n Co n ) 2 As 2 : Superconductivity and fluctuations in Fe-based compounds journal August 2016
Synthesis and Characterization of BaFe2As2 Single Crystals Grown by In-flux Technique journal July 2013
Charge nematicity and electronic Raman scattering in iron-based superconductors journal January 2016
Iron-Based Layered Superconductor La[O 1- x F x ]FeAs ( x = 0.05−0.12) with T c = 26 K journal March 2008
Orbital-driven nematicity in FeSe journal November 2014
Superconductivity above 100 K in single-layer FeSe films on doped SrTiO3 journal November 2014
High-temperature superconductivity in iron-based materials journal August 2010
What drives nematic order in iron-based superconductors? journal January 2014
Critical spin fluctuations and the origin of nematic order in Ba(Fe1−xCox)2As2 journal January 2016
Flux growth at ambient pressure of millimeter-sized single crystals of LaFeAsO, LaFeAsO1−xFx, and LaFe1−xCoxAsO journal November 2009
Charge-induced nematicity in FeSe journal August 2016
Manifestations of nematic degrees of freedom in the magnetic, elastic, and superconducting properties of the iron pnictides journal July 2012
Spin nematic fluctuations near a spin-density-wave phase journal July 2015
Magnetic ordering effects in the Raman spectra of La 1 − x Mn 1 − x O 3 journal November 1999
Raman spectroscopy of R FeAsO ( R =Sm, La) journal June 2008
Raman-scattering study of K x Sr 1 − x Fe 2 As 2 ( x = 0.0 , 0.4 ) journal August 2008
Phase transitions in LaFeAsO: Structural, magnetic, elastic, and transport properties, heat capacity and Mössbauer spectra journal September 2008
Lattice and electronic anomalies of CaFe 2 As 2 studied by Raman spectroscopy journal December 2008
Doping dependence of the lattice dynamics in Ba ( Fe 1 − x Co x ) 2 As 2 studied by Raman spectroscopy journal September 2009
Phase transitions and iron-ordered moment form factor in LaFeAsO journal August 2010
Impact of the spin-density-wave order on the superconducting gap of Ba ( Fe 1 − x Co x ) 2 As 2 journal November 2010
Character of the structural and magnetic phase transitions in the parent and electron-doped BaFe 2 As 2 compounds journal April 2011
Raman scattering study of spin-density-wave order and electron-phonon coupling in Ba(Fe 1 − x Co x ) 2 As 2 journal September 2011
Anisotropic magnetoelastic coupling in single-crystalline CeFeAsO as seen via high-resolution x-ray diffraction journal December 2011
Anisotropic electrical resistivity of LaFeAsO: Evidence for electronic nematicity journal October 2012
Interplay between lattice and spin states degree of freedom in the FeSe superconductor: Dynamic spin state instabilities journal April 2013
Electronic Raman scattering from orbital nematic fluctuations journal September 2013
Coupling of the As A 1 g phonon to magnetism in iron pnictides journal October 2013
Superconductivity-induced phonon renormalization on NaFe 1 − x Co x As journal May 2014
Origin of nematic order in FeSe journal May 2015
Raman scattering as a probe of nematic correlations journal June 2015
Manifestation of nematic degrees of freedom in the Raman response function of iron pnictides journal August 2015
Critical quadrupole fluctuations and collective modes in iron pnictide superconductors journal February 2016
Raman scattering study of spin-density-wave-induced anisotropic electronic properties in A Fe 2 As 2 ( A = Ca , Eu) journal May 2016
Tetragonal-to-Orthorhombic Structural Phase Transition at 90 K in the Superconductor Fe 1.01 Se journal July 2009
Coexistence of Competing Antiferromagnetic and Superconducting Phases in the Underdoped Ba ( Fe 0.953 Co 0.047 ) 2 As 2 Compound Using X-ray and Neutron Scattering Techniques journal August 2009
Effects of Nematic Fluctuations on the Elastic Properties of Iron Arsenide Superconductors journal October 2010
NMR Search for the Spin Nematic State in a LaFeAsO Single Crystal journal December 2012
Observation of Incipient Charge Nematicity in Ba ( Fe 1 − X Co X ) 2 As 2 journal December 2013
Origin of the Tetragonal-to-Orthorhombic Phase Transition in FeSe: A Combined Thermodynamic and NMR Study of Nematicity journal January 2015
Neutron-Scattering Measurements of Spin Excitations in LaFeAsO and Ba ( Fe 0.953 Co 0.047 ) 2 As 2 : Evidence for a Sharp Enhancement of Spin Fluctuations by Nematic Order journal February 2015
Electrical Resistivity Anisotropy from Self-Organized One Dimensionality in High-Temperature Superconductors journal March 2002
In-Plane Resistivity Anisotropy in an Underdoped Iron Arsenide Superconductor journal August 2010
Ubiquitous signatures of nematic quantum criticality in optimally doped Fe-based superconductors journal May 2016
Spin-Density-Wave Gap with Dirac Nodes and Two-Magnon Raman Scattering in BaFe 2 As 2 journal February 2012

Cited By (3)

Evidence of precursor orthorhombic domains well above the electronic nematic transition temperature in Sr(Fe 1− x Co x ) 2 As 2 journal September 2019
Intertwined spin-orbital coupled orders in the iron-based superconductors journal July 2019
Superconducting gap and nematic resonance at the quantum critical point observed by Raman scattering in BaFe 2 ( As 1 − x P x ) 2 journal February 2020

Similar Records

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY