114 citations · 336 across the 32 of their papers we have counts for
34 papers
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…
Odd-parity surface magnetism in a Kondo insulator
Maxim Dzero, Brian M. Andersen
We formulate a theory of spin-polarized tunneling between a nanowire tip of a topological Kondo insulator SmB and the bi-collinear antiferromagnet FeTe in which the tun…
Multi-orbital physics in inverse Lieb lattice altermagnets
Mercè Roig, Jannik Gondolf, Andreas Kreisel +2
The inverse Lieb lattice has recently emerged as a promising platform for altermagnetism, with several materials with this structure proposed as -wave altermagnetic candidates.…
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…
Electronic and structural properties of Rh- and Pd-based kagome layered shandites from first principles
Luca Buiarelli, Turan Birol, Brian M. Andersen +1
The shandite structure hosts transition metal ions arranged in kagome layers. These layers are stacked rhombohedrally and are interspersed with post-transition metal ions and chalc…
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…
Robust spin splitting and fermiology in the layered altermagnet CoNb4Se8
Alessandro De Vita, Chiara Bigi, Davide Romanin +44
Altermagnetism defies conventional classifications of collinear magnetic phases, combining compensated magnetization with momentum-dependent, nonrelativistic spin splitting. While…
Local signatures of altermagnetism
Jannik Gondolf, Andreas Kreisel, Mercè Roig +3
Altermagnets constitute a class of collinear compensated Néel ordered magnets that break time-reversal symmetry and feature spin-split band structures. Based on versatile microscop…
Odd-parity Magnetism Driven by Antiferromagnetic Exchange
Yue Yu, Magnus B. Lyngby, Tatsuya Shishidou +5
Realizing odd-parity, time-reversal-preserving, non-relativistic spin splitting is a central goal for spintronics applications. We propose a group-theory-based microscopic framewor…
Quasi-symmetry Constrained Spin Ferromagnetism in Altermagnets
Mercè Roig, Yue Yu, Rune C. Ekman +3
Altermagnets break time-reversal symmetry and their spin-orbit coupling (SOC) allow for an anomalous Hall effect (AHE) that depends on the direction of the Néel ordering vector. Th…
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…