235 citations · 1.6k across the 32 of their papers we have counts for
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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.…
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…
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…
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…
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…
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,…
Spiral magnetic order and topological superconductivity in a chain of magnetic adatoms on a two-dimensional superconductor
M. H. Christensen, M. Schecter, K. Flensberg +2
We study the magnetic and electronic phases of a 1D magnetic adatom chain on a 2D superconductor. In particular, we confirm the existence of a `self-organized' 1D topologically non…
Magnetic fluctuations in pair density wave superconductors
M. H. Christensen, H. Jacobsen, T. M. Maier +1
Pair density wave superconductivity constitutes a novel electronic condensate proposed to be realized in certain unconventional superconductors. Establishing its potential existenc…
Spin-Driven Nematic Instability of the Multi-Orbital Hubbard Model: Application to Iron-Based Superconductors
M. H. Christensen, Jian Kang, B. M. Andersen +1
Nematic order resulting from the partial melting of density-waves has been proposed as the mechanism to explain nematicity in iron-based superconductors. An outstanding question, h…
Self-Organized Topological Superconductivity in a Yu-Shiba-Rusinov Chain
M. Schecter, K. Flensberg, M. H. Christensen +2
We study a chain of magnetic moments exchange coupled to a conventional three dimensional superconductor. In the normal state the chain orders into a collinear configuration, while…
Spin reorientation driven by the interplay between spin-orbit coupling and Hund's rule coupling in iron pnictides
M. H. Christensen, Jian Kang, B. M. Andersen +2
In most magnetically-ordered iron pnictides, the magnetic moments lie in the FeAs planes, parallel to the modulation direction of the spin stripes. However, recent experiments in h…
Spin excitations in the nematic phase and the metallic stripe spin-density wave phase of iron pnictides
M. Kovacic, M. H. Christensen, M. N. Gastiasoro +1
We present a general study of the magnetic excitations within a weak-coupling five-orbital model relevant to itinerant iron pnictides. As a function of enhanced electronic correlat…