Zobrazeno 1 - 10
of 26 457
pro vyhledávání: '"Hove P"'
The discovery of Mott insulators and superconductivity in twisted bilayer graphene has ignited intensive research into strong correlation effects in other stacking geometries. Bernal-stacked bilayer graphene (BBG), when subjected to a perpendicular e
Externí odkaz:
http://arxiv.org/abs/2410.05387
Autor:
Nag, Pranab Kumar, Batabyal, Rajib, Ingham, Julian, Morali, Noam, Tan, Hengxin, Koo, Jahyun, Consiglio, Armando, Liu, Enke, Avraham, Nurit, Queiroz, Raquel, Thomale, Ronny, Yan, Binghai, Felser, Claudia, Beidenkopf, Haim
Materials hosting flat bands at the vicinity of the Fermi level promote exotic symmetry broken states. Common to many of these are van Hove singularities at saddle points of the dispersion or even higher-order van Hove singularities where the dispers
Externí odkaz:
http://arxiv.org/abs/2410.01994
ATi$_3$Bi$_5$ (A = Cs or Rb) are emerging topological kagome metals that exhibit superconductivity and nematicity without intertwining translational symmetry-breaking charge orders. In this work, we explore the Fermionology of their titanium kagome e
Externí odkaz:
http://arxiv.org/abs/2410.20944
Motivated by the growing interest in band structures featuring higher-order Van Hove singularities (HOVHS), we investigate a spinless fermion kagome system characterized by nearest-neighbor (NN) and next-nearest-neighbor (NNN) hopping amplitudes. Whi
Externí odkaz:
http://arxiv.org/abs/2410.07000
We show that an interacting electronic system with a single ordinary or extended Van Hove point, which crosses the Fermi energy, is unstable against triplet superconductivity. The pairing mechanism is unconventional. There is no Cooper instability. I
Externí odkaz:
http://arxiv.org/abs/2408.05572
Autor:
Falconi, Marco, Fratini, Lorenzo
In this paper we study the semiclassical limit $\hslash\to 0$ of a completely solvable model in quantum field theory: the van Hove model, describing a scalar field created and annihilated by an immovable source. Despite its simplicity, the van Hove m
Externí odkaz:
http://arxiv.org/abs/2407.20603
Autor:
Unzog, Martin, Tal, Alexey, Melo, Pedro, Senga, Ryosuke, Suenaga, Kazu, Pichler, Thomas, Kresse, Georg
We investigate the relationship between the K-edge fine structure of isolated single-wall carbon nanotubes (SWCNTs) and the Van Hove singularities (VHSs) in the conduction band density of states. To this end, we model X-ray absorption spectra of SWCN
Externí odkaz:
http://arxiv.org/abs/2409.17619
Publikováno v:
Current Applied Physics 68, 31 (2024)
Vanadium-based kagome systems AV$_3$Sb$_5$ (A = K, Rb, Cs) have emerged as paradigmatic examples exhibiting unconventional charge density waves (CDWs) and superconductivity linked to van Hove singularities (VHSs). Despite extensive studies, the three
Externí odkaz:
http://arxiv.org/abs/2408.10402
In lattice models with quadratic finite-range Hermitian Hamiltonians, the inherently non-Hermitian transfer matrix (TM) governs the band dispersion. The van Hove singularities (VHSs) are special points in the band dispersion where the density of stat
Externí odkaz:
http://arxiv.org/abs/2408.10103
We investigate the nonlinear magneto-optical response in non-centrosymmetric magnetic Weyl semimetals featuring a quadratic tilt, focusing particularly on the influence of the van Hove singularity (VHS). In the absence of a magnetic field, the second
Externí odkaz:
http://arxiv.org/abs/2407.18094