374 citations · 845 across the 15 of their papers we have counts for
14 papers · 1 filter
Polar Kerr effect from a time-reversal symmetry breaking unidirectional charge density wave
Martin Gradhand, Ilya Eremin, Johannes Knolle
We analyze the Hall conductivity of a charge ordered state with momentum and calculate the intrinsic contribution to the Kerr angle using the…
Antiferromagnetism in Iron-Based Superconductors: Selection of Magnetic Order and Quasiparticle Interference
Ilya Eremin, Johannes Knolle, Rafael M. Fernandes +2
The recent discovery of superconductivity in the iron-based layered pnictides with T_c ranging between 26 and 56K generated enormous interest in the physics of these materials. Her…
Superconductivity from repulsion in LiFeAs: novel s-wave symmetry and potential time-reversal symmetry breaking
F. Ahn, I. Eremin, J. Knolle +4
We analyze the structure of the pairing interaction and superconducting gap in LiFeAs by decomposing the pairing interaction for various kz cuts into s- and d-wave components and b…
Strong Competition of Superconducting and Magnetic Order Parameters in Ba1-xNaxFe2As2
Hemke Maeter, Gwendolyne Pascua, Hubertus Luetkens +11
We study the interplay of magnetic and superconducting order in single crystalline hole doped Ba1-xNaxFe2As2 using muon spin relaxation. We find microscopic coexistence of magnetic…
Incommensurate magnetic fluctuations and Fermi surface topology in LiFeAs
J. Knolle, V. B. Zabolotnyy, I. Eremin +12
Using the angle-resolved photoemission spectroscopy (ARPES) data accumulated over the whole Brillouin zone (BZ) in LiFeAs we analyze the itinerant component of the dynamic spin sus…
Spin excitations in layered antiferromagnetic metals and superconductors
W. Rowe, J. Knolle, I. Eremin +1
The proximity of antiferromagnetic order in high-temperature superconducting materials is considered a possible clue to the electronic excitations which form superconducting pairs.…
Pair breaking by nonmagnetic impurities in the noncentrosymmetric superconductor CePt3Si
M. Nicklas, F. Steglich, J. Knolle +3
We have studied the effect of Ge substitution and pressure on the heavy-fermion superconductor CePt3Si. Ge substitution on the Si site acts as negative chemical pressure leading to…
Preemptive nematic order, pseudogap, and orbital order in the iron pnictides
R. M. Fernandes, A. V. Chubukov, J. Knolle +2
Starting from a microscopic itinerant model, we derive and analyze the effective low-energy model for collective magnetic excitations in the iron pnictides. We show that the stripe…
Magnetic resonance from the interplay of frustration and superconductivity
J. Knolle, I. Eremin, J. Schmalian +1
Motivated by the iron-based superconductors, we develop a self-consistent electronic theory for the itinerant spin excitations in the regime of coexistence of the antiferromagnetic…
Effect of nodes, ellipticity and impurities on the spin resonance in Iron-based superconductors
S. Maiti, J. Knolle, I. Eremin +1
We analyze doping dependence of the spin resonance of an s+- superconductor and its sensitivity to the ellipticity of electron pockets, to magnetic and non-magnetic impurities, and…
Effect of Fermi Surface Nesting on Resonant Spin Excitations in Ba1-xKxFe2As2
J. -P. Castellan, S. Rosenkranz, E. A. Goremychkin +13
We report inelastic neutron scattering measurements of the resonant spin excitations in Ba1-xKxFe2As2 over a broad range of electron band filling. The fall in the superconducting t…
Multiorbital Spin Susceptibility in a Magnetically Ordered State - Orbital versus Excitonic Spin Density Wave Scenario
J. Knolle, I. Eremin, R. Moessner
We present a general theory of multiorbital spin waves in magnetically ordered metallic systems. Motivated by the itinerant magnetism of iron-based superconductors, we compare the…
Quasiparticle interference in iron-based superconductors
A. Akbari, J. Knolle, I. Eremin +1
We systematically calculate quasiparticle interference (QPI) signatures for the whole phase diagram of iron-based superconductors. Impurities inherent in the sample together with o…
Theory of itinerant magnetic excitations in the SDW phase of iron-based superconductors
J. Knolle, I. Eremin, A. V. Chubukov +1
We argue that salient experimental features of the magnetic excitations in the SDW phase of iron-based superconductors can be understood within an itinerant model. We identify a mi…