114 citations · 336 across the 32 of their papers we have counts for
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Superconductivity from altermagnetic fluctuations: the crucial role of sublattice polarization
Mats Barkman, Andreas Kreisel, Brian M. Andersen
Unconventional superconductivity in correlated systems often appears in the vicinity of a magnetically ordered state. This situation is also relevant for altermagnets, characterize…
Kohn-Luttinger Superconductivity of Weyl Fermi Arcs in PtBi
Reuel Dsouza, Nikolaos Parthenios, Brian M. Andersen +1
Recent experimental observations in the noncentrosymmetric Weyl semimetal PtBi indicate unconventional superconductivity hosted by topological surface states -- Weyl Fermi arcs…
Topological surface states revealed by the Zeeman effect in superconducting UTe2
Zhen Zhu, Hans Christiansen, Yudi Huang +11
Intrinsic topological superconductors with protected boundary modes obeying non-Abelian statistics constitute a vanishingly small class of quantum materials. A defining spectroscop…
Zero-field superconducting vortices and Majorana zero modes pinned by magnetic islands in correlated Rashba systems
Panagiotis Kotetes, Brian M. Andersen
We propose a route for pinning zero-field superconducting vortices in systems which are exchange-coupled to magnetic islands and feature Rashba spin-orbit coupling. We consider isl…
Fractional quantum vortices in chiral kagome superconductors
Frederik A. S. Philipsen, Mats Barkman, Andreas Kreisel +1
We perform a theoretical investigation of the nature of vortices in chiral superconductors on the kagome lattice. The study is motivated by recent experimental developments…
Protection of Unconventional Superconductivity from Disorder
Sofie Castro Holbæk, Morten H. Christensen, Andreas Kreisel +1
Unconventional superconductivity is a desirable state of matter due to its potential for high transition temperatures and associated favorable superconducting prop…
Visualizing the low-energy electronic structure of the triplet superconductor UTe through quasiparticle interference
Anuva Aishwarya, Hans Christiansen, Sheng Ran +6
The identification, control and theoretical modelling of spin-triplet superconductors (STC) remain a central theme in quantum materials research. Intrinsic STC are rare but offer r…
Unconventional superconductivity in monolayer transition metal dichalcogenides
Subhojit Roy, Andreas Kreisel, Brian M. Andersen +1
A variety of experimental observations in monolayer transition metal dichalcogenide superconductors with Ising spin-orbit coupling suggest the presence of an unconventional superco…
Inherent momentum-dependent gap structure of altermagnetic superconductors
Christian L. H. Rasmussen, Jannik Gondolf, Mats Barkman +4
Altermagnetic metals break time-reversal symmetry and feature spin-split Fermi surfaces generated by compensated Néel-ordered collinear magnetic moments. Being metallic, such alter…
Odd-Parity Magnetism in Fe-Based Superconductors
Reuel Dsouza, Andreas Kreisel, Brian M. Andersen +2
Odd-parity magnetism constitutes an intriguing phase of matter which breaks inversion symmetry while preserving time-reversal symmetry. Here we demonstrate that the Fe-based superc…
Gapless superconductivity from extremely dilute magnetic disorder in 2H-NbSe2-xSx
Jose Antonio Moreno, Mercè Roig, Víctor Barrena +14
Most superconducting materials exhibit a vanishing density of states at the Fermi level and Anderson's theorem posits that the superconducting gap is robust against nonmagnetic dis…
Quasiparticle Interference of Spin-Triplet Superconductors: Application to UTe
Hans Christiansen, Brian M. Andersen, P. J. Hirschfeld +1
Quasiparticle interference (QPI) obtained from scanning tunneling microscopy (STM) is a powerful method to help extract the pairing symmetry of unconventional superconductors. We e…
Nodal superconducting gap structure and topological surface states of UTe
Hans Christiansen, Max Geier, Brian M. Andersen +1
The heavy-fermion compound UTe is a candidate for hosting intrinsic spin-triplet superconductivity. At present, however, the type of triplet Cooper pairing realized in UTe…
Nonreciprocal Equilibrium Josephson Effect of Arbitrary Periodicity from Poor Man's Majorana Zero Modes
Panagiotis Kotetes, Mercè Roig, Brian M. Andersen
We show that the Josephson diode effect becomes possible when two coupled antiferromagnetic dimers of point-like magnetic adatoms are deposited on top of a Rashba superconductor. T…
Signatures of Amorphous Shiba State in FeTeSe
Jinwon Lee, Sanghun Lee, Andreas Kreisel +7
The iron-based superconductor FeTeSe is a peculiar material: it hosts a surface state with a Dirac dispersion, is a putative topological superconductor hosting Ma…
Evidence chain for time-reversal symmetry-breaking kagome superconductivity
Hanbin Deng, Guowei Liu, Z. Guguchia +25
Superconductivity and magnetism are antagonistic quantum matter, while their intertwining has long been considered in frustrated-lattice systems1-3. In this work, we utilize scanni…
Unconventional pairing in Ising superconductors: Application to monolayer NbSe
Subhojit Roy, Andreas Kreisel, Brian M. Andersen +1
The presence of a non-centrosymmetric crystal structure and in-plane mirror symmetry allows an Ising spin-orbit coupling to form in some two-dimensional materials. Examples include…
Nonlocal electrodynamics and the penetration depth of superconducting SrRuO
Henrik S. Røising, Andreas Kreisel, Brian M. Andersen
The thermal quasiparticles in a clean type-II superconductor with line nodes give rise to a quadratic low-temperature change of the penetration depth, , as first shown…
Existence of Hebel-Slichter peak in unconventional kagome superconductors
Yi Dai, Andreas Kreisel, Brian M. Andersen
We perform a theoretical investigation of the spin susceptibility of unconventional superconductivity on the kagome lattice. Despite the existence of a sign-changing gap structure,…
Superconducting diodes from magnetization gradients
Mercè Roig, Panagiotis Kotetes, Brian M. Andersen
The superconducting diode effect may exist in bulk systems as well as in junctions when time-reversal and inversion symmetries are simultaneously broken. Magnetization gradients an…
Spontaneous time-reversal symmetry breaking by disorder in superconductors
Brian M. Andersen, Andreas Kreisel, P. J. Hirschfeld
A growing number of superconducting materials display evidence for spontaneous time-reversal symmetry breaking (TRSB) below their critical transition temperatures. Precisely what t…
Thermodynamic transitions and topology of spin-triplet superconductivity: Application to UTe
Henrik S. Røising, Max Geier, Andreas Kreisel +1
The discovery of unconventional superconductivity in the heavy-fermion material UTe has reinvigorated research of spin-triplet superconductivity. We perform a theoretical study…
Lateral quantum confinement effect on monolayer high-Tc superconductors
Guanyang He, Yu Li, Yuxuan Lei +3
Despite decades of research in spatially confined superconducting systems to understand the modification of superconductivity from reduced length scales, the investigation of the q…
Role of anion in the pairing interaction of iron-based superconductivity
J. -X. Yin, Y. Y. Zhao, Zheng Wu +20
High-temperature iron-based superconductivity develops in a structure with unusual lattice-orbital geometry, based on a planar layer of Fe atoms with 3d orbitals and tetrahedrally…