Zobrazeno 1 - 10
of 515
pro vyhledávání: '"Vojta, Matthias"'
Superconductivity usually emerges from a metallic normal state which follows the Fermi-liquid paradigm. If, in contrast, the normal state is a fractionalized non-Fermi liquid, then pairing may either eliminate fractionalization via a Higgs-type mecha
Externí odkaz:
http://arxiv.org/abs/2411.07201
Autor:
Fragkopoulou, Georgia, Vojta, Matthias
We study the effect of bond disorder in extended Heisenberg-Kitaev models on the honeycomb lattice, relevant for materials such as $\alpha$-RuCl$_3$, in the semiclassical limit using a combination of T-matrix and real-space spin-wave approaches. Focu
Externí odkaz:
http://arxiv.org/abs/2408.12656
Inspired by the program of discrete holography, we show that Jackiw-Teitelboim (JT) gravity on a hyperbolic tiling of Euclidean AdS$_2$ gives rise to an Ising model on the dual lattice, subject to a topological constraint. The Ising model involves an
Externí odkaz:
http://arxiv.org/abs/2407.06266
Publikováno v:
Phys. Rev. B 110, 125123 (2024)
We characterize, by means of large-scale fermion quantum Monte Carlo simulations, metallic and deconfined quantum phase transitions in a bilayer honeycomb model in terms of their quantum critical and finite-temperature properties.The model features t
Externí odkaz:
http://arxiv.org/abs/2406.17042
Classical spin-liquids are paramagnetic phases which feature nontrivial patterns of spin correlations within their ground-state manifold whose degeneracy scales with system size. Often they harbor fractionalized excitations, and their low-energy fluc
Externí odkaz:
http://arxiv.org/abs/2403.10601
Autor:
Cônsoli, Pedro M., Vojta, Matthias
Altermagnetism, a type of magnetic order that combines properties of ferromagnets and antiferromagnets, has generated significant interest recently, in particular due to its potential spintronics applications. Here, we show that altermagnetic states,
Externí odkaz:
http://arxiv.org/abs/2402.18629
Publikováno v:
Phys. Rev. B 109, 224424 (2024)
Recently several triangular-lattice magnets with delafossite structure have been found to display spin-liquid behavior down to the lowest temperatures. Remarkably, applying a magnetic field destroys the spin liquid which then gives way to symmetry-br
Externí odkaz:
http://arxiv.org/abs/2312.03879
Autor:
Drechsler, Tom, Vojta, Matthias
The destruction of the Kondo effect in a local-moment metal can lead to a topological non-Fermi-liquid phase, dubbed fractionalized Fermi liquid, with spinon-type excitations and an emergent gauge field. We demonstrate that, if the latter displays an
Externí odkaz:
http://arxiv.org/abs/2311.13641
Autor:
Cônsoli, Pedro M., Vojta, Matthias
Publikováno v:
Phys. Rev. B 109, 064423 (2024)
Spiral spin liquids are correlated states of matter in which a frustrated magnetic system evades order by fluctuating between a set of (nearly) degenerate spin spirals. Here, we investigate the response of spiral spin liquids to quenched disorder in
Externí odkaz:
http://arxiv.org/abs/2310.16080
Autor:
Andrade, Eric C., Vojta, Matthias
Publikováno v:
Phys. Rev. B 109, L241102 (2024)
Motivated by the observation of partial magnetic order in kagome-based magnets, we study the classical kagome Ising antiferromagnet, known as kagome spin ice, including further-neighbor interactions at zero and finite temperature. While the nearest-n
Externí odkaz:
http://arxiv.org/abs/2310.02803