235 citations · 1.6k across the 32 of their papers we have counts for
32 papers
Unconventional superconductivity protected from disorder on the kagome lattice
Sofie Castro Holbæk, Morten H. Christensen, Andreas Kreisel +1
Motivated by the recent discovery of superconductivity in the kagome VSb (: K, Rb, Cs) metals, we perform a theoretical study of the symmetry-allowed superconducting…
Superconductivity from Orbital-Selective Electron-Phonon Coupling in
Ethan T. Ritz, Henrik S. Røising, Morten H. Christensen +3
Recent experiments have shown that the phase diagrams of the kagome superconductors are strongly impacted by changes in the -axis lattice parameter.…
Competing magnetic fluctuations and orders in a multiorbital model of doped SrCoAs
Ana-Marija Nedić, Morten H. Christensen, Y. Lee +6
We revisit the intriguing magnetic behavior of the paradigmatic itinerant frustrated magnet , which shows strong and competing magnetic fluctuations yet…
Superconductivity from repulsive interactions on the kagome lattice
Astrid T. Rømer, Shinibali Bhattacharyya, Roser Valentí +2
The discovery of superconductivity in layered vanadium-based kagome metals VSb (: K, Rb, Cs) has added a new family of materials to the growing class of possible unco…
Loop currents in VSb kagome metals: multipolar and toroidal magnetic orders
Morten H. Christensen, Turan Birol, Brian M. Andersen +1
Experiments in the recently discovered vanadium-based kagome metals have suggested that their charge-ordered state displays not only bond distortions, characteristic of a ``real" c…
Hot-lines topology and the fate of the spin resonance mode in three-dimensional unconventional superconductors
Fei Chen, Rafael M. Fernandes, Morten H. Christensen
In the quasi-two-dimensional (quasi-2D) copper- and iron-based superconductors, the onset of superconductivity is accompanied by a prominent peak in the magnetic spectrum at moment…
Tunable nodal kagome superconductivity in charge ordered RbV3Sb5
Z. Guguchia, C. Mielke, D. Das +18
Unconventional superconductors often feature competing orders, small superfluid density, and nodal electronic pairing. While unusual superconductivity has been proposed in the kago…
Dynamical vortices in electron-phonon superconductors
Morten H. Christensen, Andrey V. Chubukov
We analyze the structure of an wave superconducting gap in systems with electron-phonon attraction and electron-electron repulsion. Earlier works have found that superconductiv…
Theory of the charge-density wave in VSb kagome metals
Morten H. Christensen, Turan Birol, Brian M. Andersen +1
The family of metallic kagome compounds VSb (=K, Rb, Cs) was recently discovered to exhibit both superconductivity and charge order. The nature of the charge-density…
Strong-coupling expansion of multi-band interacting models: mapping onto the transverse-field - Ising model
Xiaoyu Wang, Morten. H. Christensen, Erez Berg +1
We investigate a class of two-dimensional two-band microscopic models in which the inter-band repulsive interactions play the dominant role. We first demonstrate three different sc…
Prediction of Double-Weyl Points in the Iron-Based Superconductor CaKFeAs
N. Heinsdorf, M. H. Christensen, M. Iraola +6
Employing a combination of symmetry analysis, low-energy modeling, and ab initio simulations, we predict the presence of magnetic-field-induced Weyl points close to the Fermi level…
Topological Superconductivity Induced by Magnetic Texture Crystals
Daniel Steffensen, Morten H. Christensen, Brian M. Andersen +1
We present a detailed investigation of the topological phases and Majorana fermion (MF) excitations that arise from the bulk interplay between (un)conventional one/two-band spin-si…
Evolution of nematic fluctuations in CaK(FeNi)As with spin-vortex crystal magnetic order
Anna E. Böhmer, Fei Chen, William R. Meier +11
The CaK(FeNi)As superconductors resemble the archetypal 122-type iron-based materials but have a crystal structure with distinctly lower symmetry. This fa…
Nematic Fluctuations in an Orbital Selective Superconductor FeTeSe
Qianni Jiang, Yue Shi, Morten H. Christensen +8
We present a systematic study of the nematic fluctuations in the iron chalcogenide superconductor FeTeSe () using the elastoresistivity te…
Modeling unconventional superconductivity at the crossover between strong and weak electronic interactions
Morten H. Christensen, Xiaoyu Wang, Yoni Schattner +2
High-temperature superconductivity emerges in a host of different quantum materials, often in a region of the phase diagram where the electronic kinetic energy is comparable in mag…
Evidence for a pressure-induced antiferromagnetic quantum critical point in intermediate valence UTe2
S. M. Thomas, F. B. Santos, M. H. Christensen +7
UTe is a recently discovered unconventional superconductor that has attracted much interest due to its many intriguing properties - a large residual density-of-states in the su…
Orbital transmutation and the electronic spectrum of FeSe in the nematic phase
Morten H. Christensen, Rafael M. Fernandes, Andrey V. Chubukov
We consider the electronic spectrum near in the nematic phase of FeSe () and make a detailed comparison with recent ARPES and STM experiments. Our main foc…
Sixfold enhancement of superconductivity in a tunable electronic nematic system
Chris Eckberg, Daniel J. Campbell, Tristin Metz +10
The electronic nematic phase, wherein electronic degrees of freedom lower the crystal rotational symmetry, is a common motif across a number of high-temperature superconductors. Ho…
Intertwined spin-orbital coupled orders in the iron-based superconductors
Morten H. Christensen, Jian Kang, Rafael M. Fernandes
The underdoped phase diagram of the iron-based superconductors exemplifies the complexity common to many correlated materials. Indeed, multiple ordered states that break different…
Laser-induced coherent control of an electronic nematic quantum phase transition
Avraham Klein, Morten H. Christensen, Rafael M. Fernandes
Ultrafast techniques have emerged as promising methods to study and control quantum materials. To maintain the quantum nature of the systems under study, excess heating must be avo…
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…
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.…
Unravelling incommensurate magnetism and its emergence in iron-based superconductors
Morten H. Christensen, Brian M. Andersen, Panagiotis Kotetes
We focus on a broad class of tetragonal itinerant systems sharing a tendency towards the spontaneous formation of incommensurate magnetism with ordering wavevectors $\mathbf{Q}_{1,…