346 citations · 797 across the 13 of their papers we have counts for
13 papers
Nematicity and superconductivity: Competition versus cooperation
Xiao Chen, S. Maiti, R. M. Fernandes +1
Electronic nematic behavior has been identified and studied in iron-based superconductors for some time, particularly in the well-known BaFeAs system, where it is well-know…
Nematic correlation length in iron-based superconductors probed by inelastic x-ray scattering
A. M. Merritt, F. Weber, J. -P. Castellan +7
Nematicity is ubiquitous in electronic phases of high- superconductors, particularly in the Fe-based systems. We used inelastic x-ray scattering to extract the temperature-dep…
Soft phonons reveal the nematic correlation length in Ba(FeCo)As
F. Weber, D. Parshall, L. Pintschovius +8
Nematicity is ubiquitous in electronic phases of high- superconductors, particularly in the Fe-based systems. While several experiments have probed nematic fluctuations, they…
Local nematic susceptibility in stressed BaFeAs from NMR electric field gradient measurements
T. Kissikov, R. Sarkar, M. Lawson +10
The electric field gradient (EFG) tensor at the As site couples to the orbital occupations of the As p-orbitals and is a sensitive probe of local nematicity in BaFeAs$_2…
Finite-momentum nematic fluctuations soften phonons in the superconducting state of Ba(FeCo)As
F. Weber, D. Parshall, L. Pintschovius +6
Nematic order is ubiquitous in liquid crystals and is characterized by a rotational symmetry breaking in an otherwise uniform liquid. Recently a similar phenomenon has been observe…
Interplay between tetragonal magnetic order, stripe magnetism, and superconductivity in iron-based materials
Jian Kang, Xiaoyu Wang, A. V. Chubukov +1
Motivated by recent experiments in BaKFeAs {[}A. E. Böhmer \textit{et al}, to be published{]}, we analyze the type of spin-density wave (SDW) order in dop…
Crossover from spin-waves to diffusive spin excitations in underdoped Ba(FeCo)As
G. S. Tucker, R. M. Fernandes, D. K. Pratt +12
Using inelastic neutron scattering, we show that the onset of superconductivity in underdoped Ba(FeCo)As coincides with a crossover from well-defined spin…
Observation of incipient charge nematicity in Ba(FeCo)As
Y. Gallais, R. M. Fernandes, I. Paul +7
Using electronic Raman spectroscopy, we report direct measurements of charge nematic fluctuations in the tetragonal phase of strain-free Ba(FeCoAs single c…
Magnetic excitations in underdoped Ba(Fe1-xCox)2As2 with x=0.047
G. S. Tucker, R. M. Fernandes, H. -F. Li +8
The magnetic excitations in the paramagnetic-tetragonal phase of underdoped Ba(Fe0.953Co0.047)2As2, as measured by inelastic neutron scattering, can be well described by a phenomen…
Gap nodes induced by coexistence with antiferromagnetism in iron-based superconductors
S. Maiti, R. M. Fernandes, A. V. Chubukov
We investigate the pairing in iron pnictides in the coexistence phase, which displays both superconducting and antiferromagnetic orders. By solving the pairing problem on the Fermi…
Paramagnetic Spin Correlations in CaFe2As2 Single Crystals
S. O. Diallo, D. K. Pratt, R. M. Fernandes +13
Magnetic correlations in the paramagnetic phase of CaFe2As2 (T_N=172 K) have been examined by means of inelastic neutron scattering from 180 K (~ 1.05 T_N) up to 300 K (~1.8 T_N).…
Effects of nematic fluctuations on the elastic properties of iron arsenide superconductors
Rafael M. Fernandes, Lindsay H. VanBebber, Shobo Bhattacharya +7
We demonstrate that the changes in the elastic properties of the FeAs systems, as seen in our resonant ultrasound spectroscopy data, can be naturally understood in terms of fluctua…
Unusual Fermi surface nesting in parent compounds of iron arsenic high temperature superconductors revealed by Angle Resolved Photoemission Spectroscopy
Takeshi Kondo, R. M. Fernandes, R. Khasanov +10
We use angle resolved photoemission spectroscopy (ARPES) to study the band structure of BaFe2As2 and CaFe2As2, two of the parent compounds of the iron arsenic high temperature supe…