120 citations · 234 across the 24 of their papers we have counts for
27 papers
Measuring higher-order bulk topology in a programmable quantum simulator
Pratik Sathe, Niclas Heinsdorf, Majid Kheirkhah +13
Topological insulators lie outside the standard Landau paradigm: Instead of being characterized by local order parameters and spontaneous symmetry breaking, their defining properti…
Reversible field-free superconducting diode effect controlled by an antiferromagnet
Filip Krizek, Kamil Olejník, Tobias Edwinson +19
The semiconductor diode, which allows current to flow preferentially in one direction, is a fundamental building block of numerous modern electronic circuits. Its superconducting a…
Topological superconductivity in an altermagnet-superconductor heterostructure
Michael Liudeng, Hrishikesh Patel, Marcel Franz +1
Fully gapped spin-triplet superconductors offer a natural setting for topological edge transport and Majorana excitations. Here we propose a heterostructure that interfaces alterma…
Magnetic Field Control of the Néel Vector and Magnon Visibility in Altermagnetic MnTe
Tobias Weber, Niclas Heinsdorf, Shane Smolenski +11
Altermagnetic order gives rise to momentum-dependent spin splitting of electronic and magnonic excitations even in the absence of a net magnetization. Here, we investigate the magn…
Higher Berry curvature, second Chern numbers and magnetoelectric coupling in crystalline insulators
Niclas Heinsdorf, Ken Shiozaki
We rewrite a lattice model of the four-dimensional Chern insulator as a family of translationally-invariant infinite chains over the three-dimensional Brillouin zone and compute it…
Non-Reciprocal Zone Boundary Magnon Propagation in CuOSeO
Tobias Weber, Niclas Heinsdorf, Michal Stekiel +3
Inelastic neutron scattering in the chiral magnet CuOSeO reveals strong non-reciprocal effects on magnon propagation at the boundary of the nuclear Brillouin zone. The non-…
Coherent high-velocity chiral magnons in the metallic altermagnet CrSb
Ashutosh K. Singh, Niclas Heinsdorf, Abraham A. Mancilla +8
We report the collective magnetism of the metallic altermagnet CrSb. Magnetic susceptibility and polarized neutron diffraction measurements show that CrSb is a perfectly compensate…
Proximitizing altermagnets with conventional superconductors
Niclas Heinsdorf, Marcel Franz
Recent theoretical work highlighted unique properties of superconducting altermagnets, including the wealth of topologically non-trivial phases as well as their potential uses in s…
Intrinsic defect intolerance in the ultra-pure metal PtSn
Samikshya Sahu, Dong Chen, Niclas Heinsdorf +6
Ultra-pure materials are highly valued as model systems for the study of intrinsic physics. Frequently, however, the crystal growth of such pristine samples requires significant op…
Persistent spin currents in superconducting altermagnets
Kyle Monkman, Joan Weng, Niclas Heinsdorf +2
Superconductors are famously capable of supporting persistent electrical currents, that is, currents that flow without any measurable decay as long as the material is kept in the s…
Coherence and pairing enhancement in a trilayer cuprate with layer-selective charge order
S. Smit, M. Bluschke, P. Moen +26
Trilayer cuprates hold the record for the highest superconducting critical temperatures (), yet the underlying mechanism remains elusive. Using time- and angle-resolv…
Edge-Edge Correlations without Edge-States: -clustering State as Ground State of the Extended Attractive SU(3) Hubbard Chain
Hironobu Yoshida, Niclas Heinsdorf, Hosho Katsura
We explore the phase diagram of the extended attractive SU() Hubbard chain with two-body hopping and nearest-neighbor attraction at half-filling. In the large on-site attraction…
Altermagnetic Instabilities from Quantum Geometry
Niclas Heinsdorf
Altermagnets are a newly identified type of collinear anti-ferromagnetism with vanishing net magnetic moment, characterized by lifted Kramers' degeneracy in parts of the Brillouin…
Gapped nodal planes drive a large topological Nernst effect in a chiral lattice antiferromagnet
N. D. Khanh, S. Minami, M. Hirschmann +15
The electronic structure of compensated antiferromagnets (CAF) has drawn attention for its ability to create large responses, reminiscent of ferromagnets and suitable for data stor…
Beyond-classical computation in quantum simulation
Andrew D. King, Alberto Nocera, Marek M. Rams +60
Quantum computers hold the promise of solving certain problems that lie beyond the reach of conventional computers. However, establishing this capability, especially for impactful…
Quantum error mitigation in quantum annealing
Mohammad H. Amin, Andrew D. King, Jack Raymond +32
Quantum Error Mitigation (QEM) presents a promising near-term approach to reduce error when estimating expectation values in quantum computing. Here, we introduce QEM techniques ta…
Discovery of Superconductivity and Electron-Phonon Drag in the Non-Centrosymmetric Weyl Semimetal LaRhGe
Mohamed Oudah, Hsiang-Hsi Kung, Samikshya Sahu +11
We present an exploration of the effect of electron-phonon coupling and broken inversion symmetry on the electronic and thermal properties of the semimetal LaRhGe. Our transpor…
Fate of Bosonic Topological Edge Modes in the Presence of Many-Body Interactions
Niclas Heinsdorf, Darshan G. Joshi, Hosho Katsura +1
Many magnetic materials are predicted to exhibit bosonic topological edge modes in their excitation spectra, because of the nontrivial topology of their magnon, triplon, or other q…
Nature of the current-induced insulator-to-metal transition in CaRuO as revealed by transport-ARPES
Cissy T Suen, Igor Marković, Marta Zonno +21
The Mott insulator CaRuO exhibits a rare insulator-to-metal transition (IMT) induced by DC current. While structural changes associated with this transition have been track…
Higher Berry curvature from matrix product states
Ken Shiozaki, Niclas Heinsdorf, Shuhei Ohyama
The higher Berry curvature was introduced by Kapustin and Spodyneiko as an extension of the Berry curvature in quantum mechanical systems with finite degrees of freedom to quantum…
Fundamental laws of chiral band crossings: local constraints, global constraints, and topological phase diagrams
Kirill Alpin, Moritz M. Hirschmann, Niclas Heinsdorf +4
We derive two fundamental laws of chiral band crossings: (i) a local constraint relating the Chern number to phase jumps of rotation eigenvalues; and (ii) a global constraint deter…
IrF4: From Tetrahedral Compass Model to Topological Semimetal
C. Shang, O. Ganter, N. Heinsdorf +1
The intersection of topology, symmetry, and magnetism yields a rich structure of possible phases. In this work, we study theoretically the consequences of magnetism on IrF4, which…
Symmetry-enforced topological band crossings in orthorhombic crystals: Classification and materials discovery
Andreas Leonhardt, Moritz M. Hirschmann, Niclas Heinsdorf +3
We identify all symmetry-enforced band crossings in nonmagnetic orthorhombic crystals with and without spin-orbit coupling and discuss their topological properties. We find that or…
A semimetallic square-octagon (fes) two-dimensional polymer with high mobility
Tsai-Jung Liu, Maximilian A. Springer, Niclas Heinsdorf +3
The electronic properties of -conjugated two-dimensional (2D) polymers near the Fermi level are determined by structural topology and chemical composition. Thus, tight-binding (…