Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Urban F. P. Seifert"'
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-12 (2024)
Abstract Quantum fluctuations can inhibit long-range ordering in frustrated magnets and potentially lead to quantum spin liquid (QSL) phases. A prime example are gapless QSLs with emergent U(1) gauge fields, which have been understood to be described
Externí odkaz:
https://doaj.org/article/5fac4f9db6ca4856b620d5c5a0293941
Publikováno v:
SciPost Physics, Vol 16, Iss 6, p 147 (2024)
Emergent gauge theories take a prominent role in the description of quantum matter, supporting deconfined phases with topological order and fractionalized excitations. A common construction of $\mathbb{Z}_2$ lattice gauge theories, first introduced b
Externí odkaz:
https://doaj.org/article/a2448a734b224c3cbfd32a0e16e0bc8a
When two layers of two-dimensional materials are assembled with a relative twist, moir\'e patterns arise, inducing a tremendous wealth of exotic phenomena. In this work, we consider twisting two triangular lattices hosting Dirac quantum spin liquids.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec54ac2c0206bae5d1ab8f10856f6d10
http://arxiv.org/abs/2204.09691
http://arxiv.org/abs/2204.09691
Autor:
Lukas Janssen, Urban F. P. Seifert
Publikováno v:
Phys.Rev.B
Phys.Rev.B, 2022, 105 (4), pp.045120. ⟨10.1103/PhysRevB.105.045120⟩
Phys.Rev.B, 2022, 105 (4), pp.045120. ⟨10.1103/PhysRevB.105.045120⟩
We study the zero-temperature phase diagrams of Majorana-Hubbard models with SO($N$) symmetry on two-dimensional honeycomb and $\pi$-flux square lattices, using mean-field and renormalization group approaches. The models can be understood as real cou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf47ccb900f2425c314b296ced788728
Publikováno v:
Physical Review B
In two dimensions, the topological order described by $\mathbb{Z}_2$ gauge theory coupled to free or weakly interacting fermions with a nonzero spectral Chern number $\nu$ is classified by $\nu \; \mathrm{mod}\; 16$ as predicted by Kitaev [Ann. Phys.
Publikováno v:
Phys.Rev.B
Phys.Rev.B, 2021, 103 (7), pp.075144. ⟨10.1103/PhysRevB.103.075144⟩
Physical Review B
Phys.Rev.B, 2021, 103 (7), pp.075144. ⟨10.1103/PhysRevB.103.075144⟩
Physical Review B
Spin-orbital liquids are quantum disordered states in systems with entangled spin and orbital degrees of freedom. We study exactly solvable spin-orbital models in two dimensions with selected Heisenberg-, Kitaev-, and $\Gamma$-type interactions, as w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71d6bd962b90cd38a865479a2b20643b
Autor:
Matthias Vojta, Sreejith Chulliparambil, Hong-Hao Tu, Xiao-Yu Dong, Lukas Janssen, Urban F. P. Seifert
Publikováno v:
Physical Review Letters
We study transitions between topological phases featuring emergent fractionalized excitations in two-dimensional models for Mott insulators with spin and orbital degrees of freedom. The models realize fermionic quantum critical points in fractionaliz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::35425ad0dd4cf23d25d9d75bddbcca74
Autor:
Matthias Vojta, Urban F. P. Seifert
Publikováno v:
Physical Review B. 99
Recent numerical results [Gonzalez $\textit{et al.}$, Phys. Rev. Lett. $\textbf{122}$, 017201 (2019); Shimada $\textit{et al.}$, J. Phys. Conf. Ser. $\textbf{969}$, 012126 (2018)] point to the existence of a partial-disorder ground state for a spin-1
Autor:
Urban F. P. Seifert, Leon Balents
We study the interaction of a (classical) light field with the magnetic degrees of freedom in the two-dimensional antiferromagnet Sr$_2$IrO$_4$. The reduced space group symmetry of the crystal allows for several channels for spin-operator bilinears t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d45e2bb20e322cf49bdd86e9ff7a7417
Autor:
Wolfram Brenig, Darshan G. Joshi, Matthias Vojta, Kai Phillip Schmidt, Urban F. P. Seifert, Erik Wagner, Julian Gritsch
Kitaev's honeycomb-lattice spin-$1/2$ model has become a paradigmatic example for $\mathbb{Z}_2$ quantum spin liquids, both gapped and gapless. Here we study the fate of these spin-liquid phases in differently stacked bilayer versions of the Kitaev m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60f4c61d61cf86788a4e1a1c13b9e91b
http://arxiv.org/abs/1806.01852
http://arxiv.org/abs/1806.01852