Light quantum control of persisting Higgs modes in iron-based superconductors
Sign Up to like & getrecommendations! Published in 2021 at "Nature Communications"
DOI: 10.1038/s41467-020-20350-6
Abstract: The Higgs mechanism, i.e., spontaneous symmetry breaking of the quantum vacuum, is a cross-disciplinary principle, universal for understanding dark energy, antimatter and quantum materials, from superconductivity to magnetism. Unlike one-band superconductors (SCs), a conceptually distinct Higgs… read more here.
Keywords: interband; control; higgs mode; quantum control ... See more keywords
Signatures of collective modes in fifth harmonic generation of BCS superconductor.
Sign Up to like & getrecommendations! Published in 2022 at "Faraday discussions"
DOI: 10.1039/d2fd00067a
Abstract: Recent advances in the field of THz spectroscopy allow for controlled experiments to measure signatures of collective excitations in the conventional s-wave superconductor in the fifth harmonic generation current (FHG). Here, we analyze this process… read more here.
Keywords: superconductor; fifth harmonic; signatures collective; harmonic generation ... See more keywords
Response of the Higgs amplitude mode of superfluid Bose gases in a three-dimensional optical lattice
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review A"
DOI: 10.1103/physreva.97.043628
Abstract: We study the Higgs mode of superfluid Bose gases in a three-dimensional optical lattice, which emerges near the quantum phase transition to the Mott insulator at commensurate fillings. Specifically, we consider responses of the Higgs… read more here.
Keywords: bose gases; gases three; response; mode superfluid ... See more keywords
Current-assisted Raman activation of the Higgs mode in superconductors
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.101.220507
Abstract: The Higgs mode in superconductors is a scalar mode without electric or magnetic dipole moment. Thus, it is commonly believed that its excitation is restricted to a nonlinear two-photon Raman process. However, recent efforts have… read more here.
Keywords: activation; mode superconductors; higgs mode; excitation ... See more keywords
Theory of Higgs modes in d -wave superconductors
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.102.014511
Abstract: By applying a microscopic gauge-invariant kinetic theory in $d$-wave superconductors, we analytically derive the energy spectra of the breathing Higgs mode and, in particular, rotating Higgs mode that is unique for the $d$-wave order parameter.… read more here.
Keywords: rotating higgs; higgs mode; theory higgs; higgs modes ... See more keywords
Superconducting fluctuations probed by the Higgs mode in Bi2Sr2CaCu2O8+x thin films
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review B"
DOI: 10.1103/physrevb.102.054510
Abstract: Superconducting (SC) fluctuations in cuprate superconductors have been extensively studied to gain a deep insight into preformed Cooper pairs above the SC transition temperature ${T}_{\mathrm{c}}$. While the various measurements, such as the terahertz (THz) optical… read more here.
Keywords: superconducting fluctuations; mathrm mathrm; higgs mode; thin films ... See more keywords
Following the Higgs mode across the BCS-BEC crossover in two dimensions
Sign Up to like & getrecommendations! Published in 2023 at "Physical Review B"
DOI: 10.1103/physrevb.107.134519
Abstract: Although substantial effort has been dedicated to analyzing the Higgs (amplitude) mode in superconducting systems, there are relatively few studies of the Higgs peak's dispersion and width, quantities which are observable in spectroscopic measurements. These… read more here.
Keywords: crossover; higgs mode; bcs; bec ... See more keywords
Nonlinear electromagnetic response and Higgs-mode excitation in BCS superconductors with impurities
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.99.224511
Abstract: We reveal that due to the presence of disorder oscillations of the order parameter amplitude called the Higgs mode can be effectively excited by the external electromagnetic radiation in usual BCS superconductors. This mechanism works… read more here.
Keywords: excitation; higgs mode; response; bcs superconductors ... See more keywords
Higgs Mode in the d-Wave Superconductor Bi_{2}Sr_{2}CaCu_{2}O_{8+x} Driven by an Intense Terahertz Pulse.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.120.117001
Abstract: We investigate the terahertz (THz)-pulse-driven nonlinear response in the d-wave cuprate superconductor Bi_{2}Sr_{2}CaCu_{2}O_{8+x} (Bi2212) using a THz pump near-infrared probe scheme in the time domain. We observe an oscillatory behavior of the optical reflectivity that… read more here.
Keywords: mode wave; terahertz; superconductor cacu; higgs mode ... See more keywords
Higgs Mode of Planar Coupled Spin Ladders and its Observation in C_{9}H_{18}N_{2}CuBr_{4}.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.122.127201
Abstract: Polarized inelastic neutron scattering experiments recently identified the amplitude (Higgs) mode in C_{9}H_{18}N_{2}CuBr_{4}, a two-dimensional near-quantum-critical spin-1/2 two-leg ladder compound, which exhibits a weak easy-axis exchange anisotropy. Here, we theoretically examine the dynamic spin structure… read more here.
Keywords: higgs mode; coupled spin; planar coupled;
Chiral Higgs Mode in Nematic Superconductors.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.123.237001
Abstract: Nematic superconductivity with spontaneously broken rotation symmetry has recently been reported in doped topological insulators, M_{x}Bi_{2}Se_{3} (M=Cu, Sr, Nb). Here we show that the electromagnetic (EM) response of these compounds provides a spectroscopy for bosonic… read more here.
Keywords: chiral higgs; higgs mode; spectroscopy; nematic superconductors ... See more keywords