0000000000380643

AUTHOR

Paul H. M. Van Loosdrecht

showing 2 related works from this author

Band-selective third-harmonic generation in superconducting MgB$_2$: Possible evidence for Higgs amplitude mode in the dirty limit

2020

We report on time-resolved linear and nonlinear terahertz spectroscopy of the two-band superconductor MgB$_2$ with the superconducting transition temperature $T_c \approx 36$ K. Third-harmonic generation (THG) is observed below $T_c$ by driving the system with intense narrowband THz pulses. For the pump-pulse frequencies $f=$ 0.3, 0.4, and 0.5 THz, temperature-dependent evolution of the THG signals exhibits a resonance maximum at the temperatures with the resonance conditions $2f=2\Delta_\pi(T)$ fulfilled, for the dirty-limit superconducting gap $2\Delta_\pi$. In contrast, for $f=$ 0.6 and 0.7 THz with $2f>2\Delta_\pi(T\rightarrow0)=1.03$ THz, the THG intensity increases monotonically with …

Superconductivity (cond-mat.supr-con)Condensed Matter - Materials ScienceCondensed Matter - Strongly Correlated ElectronsStrongly Correlated Electrons (cond-mat.str-el)Condensed Matter::SuperconductivityCondensed Matter - SuperconductivityMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciences
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Band-selective third-harmonic generation in superconducting MgB2 : Possible evidence for the Higgs amplitude mode in the dirty limit

2021

PhysicsSuperconductivityAmplitudeQuantum electrodynamicsHiggs bosonMode (statistics)Limit (mathematics)Third harmonicPhysical Review B
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