Results 51 to 60 of about 7,151,360 (379)
Isolated zeros destroy Fermi surface in holographic models with a lattice
Journal of High Energy Physics, 2020 We study the fermionic spectral density in a strongly correlated quantum system described by a gravity dual. In the presence of periodically modulated chemical potential, which models the effect of the ionic lattice, we explore the shapes of the ...
Floris Balm +4 more
doaj +1 more source
Infinite critical boson non-Fermi liquid
npj Quantum Materials, 2023 We study a distinct type of non-Fermi liquid where there exists an infinite number of critical bosonic modes instead of finite number of bosonic modes for the conventional ones. We consider itinerant magnets with both conduction electrons and fluctuating
Xiao-Tian Zhang, Gang Chen
doaj +1 more source
Zeeman-induced gapless superconductivity with a partial Fermi surface [PDF]
, 2018 We show that an in-plane magnetic field can drive two-dimensional spin-orbit-coupled systems under superconducting proximity effect into a gapless phase where parts of the normal state Fermi surface are gapped, and the ungapped parts are reconstructed ...
N. Yuan, L. Fu
semanticscholar +1 more source
Pressure-induced Anderson-Mott transition in elemental tellurium
Communications Materials, 2021 Elemental tellurium is a natural p-type semiconductor with a chiral structure and spin-polarized Fermi surface. Here, the authors show that the pressure-induced topological change of the Fermi surface at 17 kbar triggers an Anderson-Mott insulator-to ...
Jaime F. Oliveira +6 more
doaj +1 more source
New Journal of Physics, 2015 A three-orbital itinerant-electron model involving d _xz , d _yz and d _xy Fe 3d orbitals is proposed for iron pnictides towards understanding the ( $\pi ,0$ ) ordered magnetism and magnetic excitations in these materials.
Sayandip Ghosh, Avinash Singh
doaj +1 more source
Effective mass and Fermi surface complexity factor from ab initio band structure calculations
npj Computational Materials, 2017 The effective mass is a convenient descriptor of the electronic band structure used to characterize the density of states and electron transport based on a free electron model.
Z. M. Gibbs +9 more
semanticscholar +1 more source
Topological semimetals carrying arbitrary Hopf numbers: Fermi surface topologies of a Hopf link, Solomon's knot, trefoil knot, and other linked nodal varieties [PDF]
, 2017 We propose a type of Hopf semimetal indexed by a pair of numbers $(p,q)$, where the Hopf number is given by $pq$. The Fermi surface is given by a preimage of the Hopf map, which consists of loops nontrivially linked for a nonzero Hopf number.
M. Ezawa
semanticscholar +1 more source
Pseudogap and Fermi surface topology in the two-dimensional Hubbard model. [PDF]
, 2017 One of the distinctive features of hole-doped cuprate superconductors is the onset of a `pseudogap' below a temperature $T^*$. Recent experiments suggest that there may be a connection between the existence of the pseudogap and the topology of the Fermi ...
Wéi Wú +5 more
semanticscholar +1 more source
Fermi Surface of Sr_{2}RuO_{4}: Spin-Orbit and Anisotropic Coulomb Interaction Effects. [PDF]
Physical Review Letters, 2016 The topology of the Fermi surface of Sr_{2}RuO_{4} is well described by local-density approximation calculations with spin-orbit interaction, but the relative size of its different sheets is not.
Guoren Zhang +3 more
semanticscholar +1 more source
Evolution of electron Fermi surface with doping in cobaltates [PDF]
J. Phys.: Condens. Matter 28, 335601 (2016), 2016 The notion of the electron Fermi surface is one of the characteristic concepts in the field of condensed matter physics, and it plays a crucial role in the understanding of the physical properties of doped Mott insulators. Based on the t-J model, we study the nature of the electron Fermi surface in the cobaltates, and qualitatively reproduce the ...
arxiv +1 more source