Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Johannes, Reuther"'
Autor:
Matías G. Gonzalez, Vincent Noculak, Aman Sharma, Virgile Favre, Jian-Rui Soh, Arnaud Magrez, Robert Bewley, Harald O. Jeschke, Johannes Reuther, Henrik M. Rønnow, Yasir Iqbal, Ivica Živković
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-9 (2024)
Abstract 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, and topologically protected phenomena. Recently, the search for QSLs has
Externí odkaz:
https://doaj.org/article/0eaff1967e054f40964099801cc55144
Autor:
Max Hering, Francesco Ferrari, Aleksandar Razpopov, Igor I. Mazin, Roser Valentí, Harald O. Jeschke, Johannes Reuther
Publikováno v:
npj Computational Materials, Vol 8, Iss 1, Pp 1-10 (2022)
Abstract We investigate the magnetism of a previously unexplored distorted spin-1/2 kagome model consisting of three symmetry-inequivalent nearest-neighbor antiferromagnetic Heisenberg couplings J ⬡, J, and $$J^{\prime}$$ J ′ , and uncover a rich
Externí odkaz:
https://doaj.org/article/0e5e6eab9e5049ee989c2f28601ad72b
Autor:
Dominik Kiese, Francesco Ferrari, Nikita Astrakhantsev, Nils Niggemann, Pratyay Ghosh, Tobias Müller, Ronny Thomale, Titus Neupert, Johannes Reuther, Michel J. P. Gingras, Simon Trebst, Yasir Iqbal
Publikováno v:
Physical Review Research, Vol 5, Iss 1, p L012025 (2023)
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 fluctuations have been widely studied, the fate of the complementary nonana
Externí odkaz:
https://doaj.org/article/95e429732ecf45f686299a1400c180df
Autor:
Yannik Schaden, Johannes Reuther
Publikováno v:
Physical Review Research, Vol 5, Iss 2, p 023067 (2023)
We present a classification of bilinear Majorana representations for spin-S operators, based on the real irreducible matrix representations of SU(2). We identify two types of such representations: While the first type can be straightforwardly mapped
Externí odkaz:
https://doaj.org/article/5697f6fd36d7441e8733c34202c66d06
Autor:
Shravani Chillal, Yasir Iqbal, Harald O. Jeschke, Jose A. Rodriguez-Rivera, Robert Bewley, Pascal Manuel, Dmitry Khalyavin, Paul Steffens, Ronny Thomale, A. T. M. Nazmul Islam, Johannes Reuther, Bella Lake
Publikováno v:
Nature Communications, Vol 11, Iss 1, Pp 1-9 (2020)
Quantum spin liquids have magnetic moments that do not form magnetic order even as the temperature approaches zero, leading to the dominance of quantum fluctuations. Chillal et al. present evidence that the hyper-hyperkagome lattice of PbCuTe2O6 host
Externí odkaz:
https://doaj.org/article/642bee470cef401abaaec214f9520347
Autor:
Han Yan (闫寒), Johannes Reuther
Publikováno v:
Physical Review Research, Vol 4, Iss 2, p 023175 (2022)
In this paper 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 physics of such systems. Spiral spin liquids are a class of classical s
Externí odkaz:
https://doaj.org/article/0f711ab6df264e35a191fdc9248c78ea
Publikováno v:
SciPost Physics, Vol 12, Iss 5, p 156 (2022)
We employ a recently developed variant of the functional renormalization group method for spin systems, the so-called pseudo Majorana functional renormalization group, to investigate three-dimensional spin-1/2 Heisenberg models at finite temperatures
Externí odkaz:
https://doaj.org/article/ec008eaf33be4cc69c2a34aad3fe56c3
Autor:
Yannik Schaden, Johannes Reuther
We present a classification of bilinear Majorana representations for spin-$S$ operators, based on the real irreducible matrix representations of SU(2). We identify two types of such representations: While the first type can be straightforwardly mappe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e40f3367b74c4dfc997466dfa1fac5b
http://arxiv.org/abs/2212.07837
http://arxiv.org/abs/2212.07837
Autor:
Yasir Iqbal, Tobias Müller, Pratyay Ghosh, Michel J. P. Gingras, Harald O. Jeschke, Stephan Rachel, Johannes Reuther, Ronny Thomale
Publikováno v:
Physical Review X, Vol 9, Iss 1, p 011005 (2019)
We investigate the quantum Heisenberg model on the pyrochlore lattice for a generic spin S in the presence of nearest-neighbor J_{1} and second-nearest-neighbor J_{2} exchange interactions. By employing the pseudofermion functional renormalization gr
Externí odkaz:
https://doaj.org/article/1f20e9619c8d43b0bc57d24c2db56a4d
Publikováno v:
Physical Review B. 105
We investigate the ground state properties of the spin-$1/2$ pyrochlore Heisenberg antiferromagnet using pseudofermion functional renormalization group techniques. The first part of our analysis is based on an enhanced parton mean-field approach whic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7bb641ab42c5ef23f6226b61cd53f89
https://doi.org/10.1103/physrevb.105.054426
https://doi.org/10.1103/physrevb.105.054426