scholarly journals Critical particle-hole composites at twice the Fermi wave vector in a U(1) spin liquid with a Fermi surface

2011 ◽  
Vol 83 (3) ◽  
Author(s):  
Ki-Seok Kim
Keyword(s):  
Fermi Surface ◽  
Wave Vector ◽  
Spin Liquid ◽  
Fermi Wave Vector

scholarly journals The influence of the electroneutrality of the metal layer on the plasmon spectrum in "dielectric-metal-dielectric" structures

2019 ◽  
pp. 141-144
Author(s):  
Vitalii Polovyi ◽  
Kostrobiy Petro
Keyword(s):  
Wave Vector ◽  
Metal Layer ◽  
Energy Levels ◽  
Metal Thickness ◽  
Fermi Wave Vector ◽  
Dielectric Structures ◽  
Plasmon Spectrum

This paper proposes a model that takes into account the discretization of the Fermi wave vector and energy levels, as well as the condition of electroneutrality when investigating the influence of metal thickness on the spectrum of SPPs waves in heterogeneous dielectric-metal-dielectric structures.

scholarly journals Field-Induced Instability of a Gapless Spin Liquid with a Spinon Fermi Surface

2017 ◽  
Vol 119 (13) ◽  
Author(s):  
M. Gomilšek ◽  
M. Klanjšek ◽  
R. Žitko ◽  
M. Pregelj ◽  
F. Bert ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Spin Liquid

scholarly journals Magnetic field-induced intermediate quantum spin liquid with a spinon Fermi surface

2019 ◽  
Vol 116 (25) ◽  
pp. 12199-12203 ◽  
Author(s):  
Niravkumar D. Patel ◽  
Nandini Trivedi
Keyword(s):  
Magnetic Field ◽  
Fermi Surface ◽  
Intermediate Phase ◽  
Quantum Spin ◽  
Spin Liquid ◽  
Spin Correlations ◽  
Density Matrix Renormalization ◽  
Static Spin ◽  
Kitaev Model ◽  
Quantum Spin Liquid

The Kitaev model with an applied magnetic field in the H∥[111] direction shows two transitions: from a nonabelian gapped quantum spin liquid (QSL) to a gapless QSL at Hc1≃0.2K and a second transition at a higher field Hc2≃0.35K to a gapped partially polarized phase, where K is the strength of the Kitaev exchange interaction. We identify the intermediate phase to be a gapless U(1) QSL and determine the spin structure function S(k) and the Fermi surface ϵFS(k) of the gapless spinons using the density matrix renormalization group (DMRG) method for large honeycomb clusters. Further calculations of static spin-spin correlations, magnetization, spin susceptibility, and finite temperature-specific heat and entropy corroborate the gapped and gapless nature of the different field-dependent phases. In the intermediate phase, the spin-spin correlations decay as a power law with distance, indicative of a gapless phase.

scholarly journals Evidence for a spinon Fermi surface in the triangular S=1 quantum spin liquid Ba3NiSb2O9

2017 ◽  
Vol 95 (6) ◽  
Author(s):  
B. Fåk ◽  
S. Bieri ◽  
E. Canévet ◽  
L. Messio ◽  
C. Payen ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Quantum Spin ◽  
Spin Liquid ◽  
Quantum Spin Liquid
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