Higgs modes in two-dimensional spatially-indirect exciton condensates

Abstract

Higgs modes in condensed matter physics have drawn attention because of analogies to the Higgs bosons of particle physics. Here we use a microscopic time-dependent mean-field theory to study the collective mode spectra of two-dimensional spatially indirect exciton (electron-hole pair) condensates, focusing on the Higgs modes, i.e., those that have a large weight in electron-hole pair amplitude response functions. We find that in the low exciton density (BEC) limit, the dominant Higgs modes of spatially indirect exciton condensates correspond to adding electron-hole pairs that are orthogonal to the condensed pair state. We comment on the previously studied Higgs-like collective excitations of superconductors in light of this finding.

arXiv comment12 pages, 5 figures. Comments are welcome

References in corpus (43)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Many-Body Physics with Ultracold Gases
• Feshbach Resonances in Ultracold Gases
• Theory of ultracold Fermi gases
• Observation of resonance condensation of fermionic atom pairs
• Observation of Superfluidity of Polaritons in Semiconductor Microcavities
• Bose-Einstein Condensation of Excitons in Bilayer Electron Systems
• Experimental Study of the BEC-BCS Crossover Region in Lithium 6
• Evidence of high-temperature exciton condensation in 2D atomic double layers
• Higgs Amplitude Mode in BCS Superconductors Nb${}_{1-x}$Ti${}_x$N induced by Terahertz Pulse Excitation
• Amplitude / Higgs Modes in Condensed Matter Physics
• The `Higgs' Amplitude Mode at the Two-Dimensional Superfluid-Mott Insulator Transition
• Exciton condensate in semiconductor quantum well structures.
• Excitonic superfluid phase in Double Bilayer Graphene
• Quantum Hall Drag of Exciton Superfluid in Graphene
• Quantum Magnets under Pressure: Controlling Elementary Excitations in TlCuCl3
• Higgs Mode in Superconductors
• Exciton Condensation and Perfect Coulomb Drag
• High Temperature Superfluidity in Double Bilayer Graphene
• Monitoring and manipulating Higgs and Goldstone modes in a supersolid quantum gas
• Visibility of the Amplitude (Higgs) Mode in Condensed Matter
• How to make a bilayer exciton condensate flow
• Amplitude `Higgs' mode in 2H-NbSe2 Superconductor
• The Higgs Mode in Disordered Superconductors Close to a Quantum Phase Transition
• Higgs mode and its decay in a two dimensional antiferromagnet
• Non-linear optical effects and third-harmonic generation in superconductors: Cooper-pairs vs Higgs mode contribution
• Quantum and classical criticality in a dimerized quantum antiferromagnet
• Higgs mode in the d-wave superconductor Bi2Sr2CaCu2O8+x driven by an intense terahertz pulse
• Strongly enhanced tunneling at total charge neutrality in double bilayer graphene-WSe${}_2$ heterostructures
• Theory of Two-Dimensional Spatially Indirect Equilibrium Exciton Condensates
• Effective action for Superconductors and BCS-Bose crossover
• Pressure induced collapse of the charge density wave and Higgs mode visibility in 2H-TaS${}_2$
• Non-relativistic dynamics of the amplitude (Higgs) mode in superconductors
• Infrared activation of the Higgs mode by supercurrent injection in superconducting NbN
• Higgs-mode radiance and charge-density-wave order in 2H-NbSe${}_2$
• Higgs bosons in particle physics and in condensed matter
• Evidence from quantum Monte Carlo of large gap superfluidity and BCS-BEC crossover in double electron-hole layers
• Collective modes and superflow instabilities of strongly correlated Fermi superfluids
• Bardasis-Schrieffer polaritons in excitonic insulators
• Amplitude-mode dynamics of polariton condensates
• Higgs amplitude mode in massless Dirac fermion systems
• Direct observation of the quantum-fluctuation driven amplitude mode in a microcavity polariton condensate

Cited by in corpus (5)

• Polaron spectroscopy of a bilayer excitonic insulator
• Direct observation of the quantum-fluctuation driven amplitude mode in a microcavity polariton condensate
• Ground and excited states of coupled exciton liquids in electron-hole quadrilayers
• Topological hybrid electron-hole Cooper pairing
• Ab initio Approach to Collective Excitations in Excitonic Insulators