749 citations · 3.8k across the 58 of their papers we have counts for
59 papers
Thermally Enhanced Pseudo-Goldstone Spin Gap in the Isotropic Helimagnet ZnCrSe
N. D. Andriushin, A. Sanders, J. Reuther +8
In magnetically ordered systems, the spin gap in the magnon spectrum is normally expected to decrease on warming and close at the transition out of the long-range order. The presen…
From dimensional reduction to tetramerization in mixed ferro-antiferro breathing pyrochlores
Sourin Chatterjee, Kelvin Salou-Smith, Benedikt Schneider +8
We study the spin-1/2 nearest-neighbor Heisenberg model on the breathing pyrochlore lattice in the mixed ferro-antiferromagnetic regime, where one tetrahedral sublattice is antifer…
Pseudo-fermion functional renormalization group with magnetic fields
Vincent Noculak, Johannes Reuther
The pseudo-fermion functional renormalization group is generalized to treat spin Hamiltonians with finite magnetic fields, enabling its application to arbitrary spin lattice models…
Competing Gauge Fields and Entropically-Driven Spin Liquid to Spin Liquid Transition in non-Kramers Pyrochlores
Daniel Lozano-Gómez, Vincent Noculak, Jaan Oitmaa +4
Gauge theories are powerful tools in theoretical physics, allowing complex phenomena to be reduced to simple principles, and are used in both high-energy and condensed matter physi…
$\require{mhchem}$Quantum paramagnetism in the decorated square-kagome antiferromagnet $\ce{Na6Cu7BiO4(PO4)4Cl3}$
Nils Niggemann, Nikita Astrakhantsev, Arnaud Ralko +9
$\require{mhchem}$The square-kagome lattice Heisenberg antiferromagnet is a highly frustrated Hamiltonian whose material realizations have been scarce. We theoretically investigate…
Dynamics of KNi(SO) governed by proximity to a 3D spin liquid model
M. G. Gonzalez, V. Noculak, A. Sharma +9
Quantum spin liquids (QSLs) have become a key area of research in magnetism due to their remarkable properties, such as long-range entanglement, fractional excitations, pinch-point…
Pseudo-fermion functional renormalization group for spin models
Tobias Müller, Dominik Kiese, Nils Niggemann +5
For decades, frustrated quantum magnets have been a seed for scientific progress and innovation in condensed matter. As much as the numerical tools for low-dimensional quantum magn…
Classical spin models of the windmill lattice and their relevance for PbCuTeO
Anna Fancelli, Johannes Reuther, Bella Lake
We investigate classical Heisenberg models on the distorted windmill lattice and discuss their applicability to the spin- spin liquid candidate PbCuTeO. We first consi…
Bilinear Majorana representations for spin operators with spin magnitudes
Yannik Schaden, Johannes Reuther
We present a classification of bilinear Majorana representations for spin- operators, based on the real irreducible matrix representations of SU(2). We identify two types of suc…
Quantum effects on unconventional pinch point singularities
Nils Niggemann, Yasir Iqbal, Johannes Reuther
Fracton phases are a particularly exotic type of quantum spin liquids where the elementary quasiparticles are intrinsically immobile. These phases may be described by unconventiona…
Classical and quantum phases of the pyrochlore magnet with Heisenberg and Dzyaloshinskii-Moriya interactions
Vincent Noculak, Daniel Lozano-Gómez, Jaan Oitmaa +4
We investigate the ground state and critical temperature phase diagrams of the classical and quantum pyrochlore lattice with nearest-neighbor Heisenberg and Dzyaloshinskii-…
Enhanced symmetry-breaking tendencies in the pyrochlore antiferromagnet
Imre Hagymási, Vincent Noculak, Johannes Reuther
We investigate the ground-state properties of the nearest-neighbor pyrochlore Heisenberg antiferromagnet using two complementary numerical methods, density-matrix renormaliza…
Pinch-points to half-moons and up in the stars: the kagome skymap
Dominik Kiese, Francesco Ferrari, Nikita Astrakhantsev +9
Pinch point singularities, associated with flat band magnetic excitations, are tell-tale signatures of Coulomb spin liquids. While their properties in the presence of quantum fluct…
Low energy structure of spiral spin liquids
Han Yan, Johannes Reuther
In this work we identify a previously unexplored type of topological defect in spiral spin liquids -- the momentum vortex -- and reveal its dominant role in shaping the low energy…
Quantitative functional renormalization for three-dimensional quantum Heisenberg models
Nils Niggemann, Johannes Reuther, Björn Sbierski
We employ a recently developed variant of the functional renormalization group method for spin systems, the so-called pseudo Majorana functional renormalization group, to investiga…
Pinwheel valence-bond-crystal ground state of the spin- Heisenberg antiferromagnet on the lattice
Nikita Astrakhantsev, Francesco Ferrari, Nils Niggemann +9
We investigate the nature of the ground-state of the spin- Heisenberg antiferromagnet on the lattice by complementary state-of-the-art numerical techniques,…
Dimerization tendencies of the pyrochlore Heisenberg antiferromagnet: A functional renormalization group perspective
Max Hering, Vincent Noculak, Francesco Ferrari +2
We investigate the ground state properties of the spin- pyrochlore Heisenberg antiferromagnet using pseudofermion functional renormalization group techniques. The first part o…
Magnetic field induced quantum spin liquid in the two coupled trillium lattices of KNi(SO)
Ivica Zivkovic, Virgile Favre, Catalina Salazar Mejia +19
Quantum spin liquids are exotic states of matter which form when strongly frustrated magnetic interactions induce a highly entangled quantum paramagnet far below the energy scale o…
Phase diagram of a distorted kagome antiferromagnet and application to Y-kapellasite
Max Hering, Francesco Ferrari, Aleksandar Razpopov +4
We investigate the magnetism of a previously unexplored distorted spin-1/2 kagome model consisting of three symmetry-inequivalent nearest-neighbor antiferromagnetic Heisenberg coup…
Fracton excitations in classical frustrated kagome spin models
Max Hering, Han Yan, Johannes Reuther
Fractons are topological quasiparticles with limited mobility. While there exists a variety of models hosting these excitations, typical fracton systems require rather complicated…
Frustrated Quantum Spins at finite Temperature: Pseudo-Majorana functional RG approach
Nils Niggemann, Björn Sbierski, Johannes Reuther
The pseudofermion functional renormalization group (PFFRG) method has proven to be a powerful numerical approach to treat frustrated quantum spin systems. In its usual implementati…
Signatures for Berezinsky-Kosterlitz-Thouless critical behaviour in the planar antiferromagnet BaNiVO
E. S. Klyushina, J. Reuther, L. Weber +6
We investigate the critical properties of the spin- honeycomb antiferromagnet BaNiVO, both below and above the ordering temperature using neutron diffraction a…
Projective symmetry group classifications of quantum spin liquids on the simple cubic, body centered cubic, and face centered cubic lattices
Jonas Sonnenschein, Aishwarya Chauhan, Yasir Iqbal +1
We perform extensive classifications of quantum spin liquids on the simple cubic, body centered cubic, and face centered cubic lattices using a spin-rotation invaria…
Classical spiral spin liquids as a possible route to quantum spin liquids
Nils Niggemann, Max Hering, Johannes Reuther
Quantum spin liquids are long-range entangled phases whose magnetic correlations are determined by strong quantum fluctuations. While an overarching principle specifying the precis…