92 citations · 237 across the 8 of their papers we have counts for
8 papers
Nonlinear Meissner effect in Nb3Sn coplanar resonators
J. Makita, C. Sundahl, G. Ciovati +2
We investigated the nonlinear Meissner effect (NLME) in NbSn thin film coplanar resonators by measuring the resonance frequency as a function of a parallel magnetic field at di…
Ultrafast generation and detection of propagating coherent acoustic phonon wave packets in ultra-thin iron pnictide films
D. Cheng, B. Song, J. H. Kang +9
We observe pronounced oscillations in differential reflectivity of 9 nm and 60 nm BaFe\textsubscript{2}As\textsubscript{2} (Ba-122) thin films using ultrafast optical spectroscopy.…
Light Quantum Control of Persisting Higgs Modes in Iron-Based Superconductors
C. Vaswani, J. H. Kang, M. Mootz +12
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 m…
Discovery of Light-induced Metastable Martensitic Anomaly Controlled by Single-Cycle Terahertz Pulses
X. Yang, B. Song, C. Vaswani +9
We report on an ultrafast photoinduced phase transition with a strikingly long-lived Martensitic anomaly driven by above-threshold single-cycle terahertz (THz) pulses in NbSn.…
Superconductivity in Undoped BaFe2As2 by Tetrahedral Geometry Design
J. H. Kang, J. -W. Kim, P. J. Ryan +9
Fe-based superconductors exhibit a diverse interplay between charge, orbital, and magnetic ordering1-4. Variations in atomic geometry affect electron hopping between Fe atoms5,6 an…
Spontaneous Hall Effect enhanced by local Ir moments in epitaxial PrIrO thin films
Lu Guo, Neil Campbell, Yongseong Choi +10
Rare earth pyrochlore Iridates (RE2Ir2O7) consist of two interpenetrating cation sublattices, the RE with highly-frustrated magnetic moments, and the Iridium with extended conducti…
Discovery of Terahertz Second Harmonic Generation from Lightwave Acceleration of Symmetry--Breaking Nonlinear Supercurrents
C. Vaswani, C. Sundahl, M. Mootz +11
We report terahertz (THz) second harmonic generation (SHG) in superconductors (SC) with inversion symmetric equilibrium states that forbid even-order nonlinearities. Such SHG signa…
Competing Orders and Ultrafast Energy Transfer at the Quantum Limit in a NbSn Superconductor Probed by Terahertz Electrodynamics
X. Yang, X. Zhao, C. Vaswani +10
We report the low-energy electrodynamics of a moderately clean A15 superconductor (SC) following ultrafast excitation to understand and manipulate terahertz (THz) quasi--particle (…