Zobrazeno 1 - 10
of 513
pro vyhledávání: '"Vojta, Matthias"'
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
We use large-scale fermion quantum Monte Carlo simulations to study metallic and deconfined quantum phase transitions in a bilayer honeycomb model, focusing on their quantum critical and finite-temperature properties. At weak interaction, a fully sym
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
Autor:
Kourris, Christos, Vojta, Matthias
Publikováno v:
Phys. Rev. B 108, 235106 (2023)
The formation of a heavy Fermi liquid in metals with local moments is characterized by multiple energy and temperature scales, most prominently the Kondo temperature and the coherence temperature, characterizing the onset of Kondo screening and the e
Externí odkaz:
http://arxiv.org/abs/2305.16198
Autor:
Köhler, Fabian, Vojta, Matthias
Publikováno v:
Phys. Rev. B 109, 075123 (2024)
Non-uniform strain applied to graphene's honeycomb lattice can induce pseudo-Landau levels in the single-particle spectrum. Various generalizations have been put forward, including a particular family of hopping models in $d$ space dimensions. Here w
Externí odkaz:
http://arxiv.org/abs/2305.07051