381 citations · 5.2k across the 138 of their papers we have counts for
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Raising the critical temperature by disorder in unconventional superconductors mediated by spin fluctuations
Astrid T. Roemer, P. J. Hirschfeld, Brian M. Andersen
We propose a mechanism whereby disorder can enhance the transition temperature Tc of an unconventional superconductor with pairing driven by exchange of spin fluctuations. The theo…
Magnetic phase diagram of the iron pnictides in the presence of spin-orbit coupling: Frustration between and magnetic phases
Morten H. Christensen, Peter P. Orth, Brian M. Andersen +1
We investigate the impact of spin anisotropic interactions, promoted by spin-orbit coupling, on the magnetic phase diagram of the iron-based superconductors. Three distinct magneti…
Emergent magnetic degeneracy in iron pnictides due to the interplay between spin-orbit coupling and quantum fluctuations
Morten H. Christensen, Peter P. Orth, Brian M. Andersen +1
Recent experiments in iron pnictide superconductors reveal that, as the putative magnetic quantum critical point is approached, different types of magnetic order coexist over a nar…
Enhancing Superconductivity by Disorder
Maria N. Gastiasoro, Brian M. Andersen
We study two mechanisms for enhancing the superconducting transition temperature Tc by nonmagnetic disorder in both conventional (sign-preserving gaps) and unconventional (sign-cha…
Spin-Orbit Coupling and Magnetic Anisotropy in Iron-Based Superconductors
Daniel D. Scherer, Brian M. Andersen
We determine theoretically the effect of spin-orbit coupling on the magnetic excitation spectrum of itinerant multi-orbital systems, with specific application to iron-based superco…
Magnetic ground state and magnon-phonon interaction in multiferroic h-YMnO
S. L. Holm, A. Kreisel, T. K. Schäffer +14
Inelastic neutron scattering has been used to study the magneto-elastic excitations in the multiferroic manganite hexagonal YMnO. An avoided crossing is found between magnon an…
Universality of scanning tunneling microscopy in cuprate superconductors
Peayush Choubey, Andreas Kreisel, T. Berlijn +2
We consider the problem of local tunneling into cuprate superconductors, combining model based calculations for the superconducting order parameter with wavefunction information ob…
Role of multiorbital effects in the magnetic phase diagram of iron-pnictides
Morten H. Christensen, Daniel D. Scherer, Panagiotis Kotetes +1
We elucidate the pivotal role of the bandstructure's orbital content in deciding the type of commensurate magnetic order stabilized within the itinerant scenario of iron-pnictides.…
Robustness of Quasiparticle Interference Test for Sign-changing Gaps in Multiband Superconductors
Johannes H. J. Martiny, Andreas Kreisel, P. J. Hirschfeld +1
Recently, a test for a sign-changing gap function in a candidate multiband unconventional superconductor involving quasiparticle interference data was proposed. The test was based…
Imaging the Real Space Structure of the Spin Fluctuations in an Iron-based superconductor
Shun Chi, Ramakrishna Aluru, Stephanie Grothe +8
Spin fluctuations are a leading candidate for the pairing mechanism in high temperature superconductors, supported by the common appearance of a distinct resonance in the spin susc…