Zobrazeno 1 - 10
of 923
pro vyhledávání: '"S. A. Parameswaran"'
Publikováno v:
Physical Review X, Vol 12, Iss 3, p 031020 (2022)
We study the excitations that emerge upon doping the translationally invariant correlated insulating states in magic-angle twisted bilayer graphene at various integer filling factors ν. We identify parameter regimes where these are excitations assoc
Externí odkaz:
https://doaj.org/article/b4957fa20687457b9fa7469c52d72ac8
Autor:
Y. H. Kwan, G. Wagner, T. Soejima, M. P. Zaletel, S. H. Simon, S. A. Parameswaran, N. Bultinck
Publikováno v:
Physical Review X, Vol 11, Iss 4, p 041063 (2021)
We study magic angle graphene in the presence of both strain and particle-hole symmetry breaking due to nonlocal interlayer tunneling. We perform a self-consistent Hartree-Fock study that incorporates these effects alongside realistic interaction and
Externí odkaz:
https://doaj.org/article/91ea566b047443bdac3e90f625b1df7d
Autor:
Y. H. Kwan, P. Reiss, Y. Han, M. Bristow, D. Prabhakaran, D. Graf, A. McCollam, S. A. Parameswaran, A. I. Coldea
Publikováno v:
Physical Review Research, Vol 2, Iss 1, p 012055 (2020)
Nodal semimetals are a unique platform to explore topological signatures of the unusual band structure that can manifest by accumulating a nontrivial phase in quantum oscillations. Here we report a study of the de Haas–van Alphen oscillations of th
Externí odkaz:
https://doaj.org/article/5830c9b28e014a8880cb53e8961b5585
Publikováno v:
Physical Review X, Vol 10, Iss 1, p 011005 (2020)
We study the classical dimer model on rhombic Penrose tilings, whose edges and vertices may be identified as those of a bipartite graph. We find that Penrose tilings do not admit perfect matchings (defect-free dimer coverings). Instead, their maximum
Externí odkaz:
https://doaj.org/article/d7160fdca2a74c2bbdc6d2b1794ac9b9
We construct models hosting classical fractal spin liquids on two realistic three-dimensional (3D) lattices of corner-sharing triangles: trillium and hyperhyperkagome (HHK). Both models involve the same form of three-spin Ising interactions on triang
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a4606e8371fae8c552bd493712b30be
https://doi.org/10.1103/physrevb.105.224410
https://doi.org/10.1103/physrevb.105.224410
Akademický článek
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We study classical dimers on two-dimensional quasiperiodic Ammann-Beenker (AB) tilings. Despite the lack of periodicity we prove that each infinite tiling admits 'perfect matchings' in which every vertex is touched by one dimer. We introduce an auxil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::462275eebbe9f8c8ffe7cd7aaf4c1b62
http://arxiv.org/abs/2103.01235
http://arxiv.org/abs/2103.01235
Publikováno v:
Proceedings of the National Academy of Sciences of the United States of America
Significance The quasi-1D magnetic insulator CoNb2O6 hosts a paradigmatic example of a quantum phase transition in the 1D Ising universality class. While the physics near the transition is largely insensitive to the microscopic Hamiltonian, several f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::e84363ae6a2b428e09ba82a8f92f3cd1
https://pubmed.ncbi.nlm.nih.gov/32978298
https://pubmed.ncbi.nlm.nih.gov/32978298
We consider fractional quantum Hall states in systems where two flat Chern number $C=\pm 1$ bands are labeled by an approximately conserved 'valley' index and interchanged by time reversal symmetry. At filling factor $\nu=1$ this setting admits an un
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01cd9b4ab94e14b13783c82ee41e23aa
http://arxiv.org/abs/2003.11559
http://arxiv.org/abs/2003.11559
Publikováno v:
Physical Review X, Vol 5, Iss 4, p 041046 (2015)
Surface Fermi arcs are the most prominent manifestation of the topological nature of Weyl semimetals. In the presence of a static magnetic field oriented perpendicular to the sample surface, their existence leads to unique intersurface cyclotron orbi
Externí odkaz:
https://doaj.org/article/5c85114f8b59446c909bc6ea4e0a52de