Results 41 to 50 of about 1,704 (228)

Light composite fermions [PDF]

Physics Letters B, 1981
't Hooft's conditions for massless composite fermions are discussed. We then study the various mechanisms through which such composite fermions can acquire a small mass. Two new mass generation mechanisms are proposed.
openaire   +1 more source

Light fermions in composite models [PDF]

Physical Review D, 1993
22 pages, 2 figures not included, latex, UCLA/92/TEP ...
Khlebnikov, S. Yu., Peccei, R. D.
openaire   +3 more sources

Trial Wavefunctions for the Goldstone Mode in 𝜈=1/2+1/2 Quantum Hall Bilayers

Advances in Condensed Matter Physics, 2011
Based on the known physics of the excitonic superfluid or 111 state of the quantum Hall 𝜈=1/2+1/2 bilayer, we create a simple trial wavefunction ansatz for constructing a low-energy branch of (Goldstone) excitations by taking the overall ground state ...
Gunnar Möller, Steven H. Simon
doaj   +1 more source

Resonant and nonresonant new phenomena of four-fermion operators for experimental searches

Physics Letters B, 2015
In the fermion content and gauge symmetry of the standard model (SM), we study the four-fermion operators in the torsion-free Einstein–Cartan theory. The collider signatures of irrelevant operators are suppressed by the high-energy cutoff (torsion-field ...
She-Sheng Xue
doaj   +1 more source

Low‐Symmetry Weyl Semimetals: A Path to Ideal Topological States

Advanced Functional Materials, EarlyView.
This study presents a theoretical framework for realizing ideal Weyl semimetals, where Weyl nodes are well‐isolated at the Fermi level. The approach is exemplified in the low‐symmetry material Cu2SnSe3, which exhibits tunable topological phases, current‐induced orbital magnetization, and a strong circular photogalvanic effect, making it a promising ...
Darius‐Alexandru Deaconu, Varun Shah, Rodion Vladimirovich Belosludov, Mohammad Saeed Bahramy   +3 more
wiley   +1 more source

Coupled first-order transitions and unconventional superfluidity in a Fermi-Bose mixture

Physical Review Research, 2020
A model of a mixture of spinless fermions and spin-zero hardcore bosons, with filling fractions ρ_{F} and ρ_{B}, respectively, on a two-dimensional square lattice with composite hopping t is presented.
K. Sheshadri, A. Chainani
doaj   +1 more source

Large Anomalous and Topological Hall Effect and Nernst Effect in a Dirac Kagome Magnet Fe3Ge

Advanced Functional Materials, EarlyView.
Fe3Ge, a Kagome‐lattice magnet, exhibits remarkable anomalous Hall and Nernst effects, with transverse thermoelectric conductivity surpassing or comaprable to some well‐known ferromagnets. First‐principles calculations attribute these to Berry curvature from massive Dirac gaps. Additionally, topological Hall and Nernst signals emerge from field‐induced
Chunqiang Xu, Shuvankar Gupta, Hengxin Tan, Hyeonhu Bae, Olajumoke Oluwatobiloba Emmanuel, Mingyu Xu, Yan Wu, Xiaofeng Xu, Pengpeng Zhang, Weiwei Xie, Binghai Yan, Xianglin Ke   +11 more
wiley   +1 more source

Direct Evidence of Topological Dirac Fermions in a Low Carrier Density Correlated 5d Oxide

Advanced Functional Materials, EarlyView.
The 5d oxide BiRe2O6 is discovered as a low‐carrier‐density topological semimetal hosting symmetry‐protected Dirac fermions stabilized by nonsymmorphic symmetries. Angle‐resolved photoemission spectroscopy, quantum oscillations, and magnetotransport measurements reveal gapless Dirac cones, quasi‐2D Fermi surfaces, high carrier mobility, and a field ...
Premakumar Yanda, Jorge Cardenas‐Gamboa, Ding Pei, François Bertran, Leila Noohinejad, Snehashish Chatterjee, Changjiang Yi, Iñigo Robredo, Horst Borrmann, Maia G. Vergniory, Chandra Shekhar, Claudia Felser   +11 more
wiley   +1 more source

Particle-vortex duality in topological insulators and superconductors

Journal of High Energy Physics, 2017
We investigate the origins and implications of the duality between topological insulators and topological superconductors in three and four spacetime dimensions.
Jeff Murugan, Horatiu Nastase
doaj   +1 more source

W boson mass tension caused by its right-handed gauge coupling at high energies?

Nuclear Physics B, 2022
The CDF collaboration's recent high-precision measurement of the W mass is in 7.0σ disagreement with the Standard Model expectation. This tension will be relieved if the W boson has a non-trivial right-handed gauge coupling at high energies.
She-Sheng Xue
doaj   +1 more source