39 citations · 47 across the 9 of their papers we have counts for
9 papers
Derivation and application of a general scaling relation between the dc and asymptotic high-frequency optical Hall responses
E. Abelev, R. Romero, N. P. Armitage
Based on the Kramers-Krong relations, we derive and apply a quite general expression that that relates the low frequency quasi-dc Hall conductivity to the asymptotic high frequency…
Terahertz range polarization rotation in the candidate time-reversal symmetry breaking superconductor BiNi
Ralph Romero, Zhenisbek Tagay, Jiahao Liang +3
Here we report the observation of time-reversal symmetry (TRS) breaking superconductivity in a BiNi bilayer using terahertz (THz) polarimetry. Leveraging a novel high-precision THz…
Planckian scattering and parallel conduction channels in the iron chalcogenide superconductors FeTeSe
Ralph Romero, Hee Taek Yi, Seongshik Oh +1
The remarkable linear in temperature resistivity of the cuprate superconductors, which extends in some samples from to the melting temperature, remains unexplained. Although…
Decoupling momentum and energy relaxation rates in cuprate strange metals via giant THz nonlinearities
Dipanjan Chaudhuri, David Barbalas, Fahad Mahmood +7
Understanding the -linear normal-state resistivity of cuprates remains a central physics challenge. The associated momentum relaxation rate, , saturates near the conjecture…
Energy and momentum relaxation through the Curie temperature in an itinerant ferromagnet
Rishi Bhandia, Tim Priessnitz, Jiahao Liang +8
In this work, we combine conventional linear response time-domain THz spectroscopy with non-linear THz-pump THz-probe techniques to study metallic strained thin films of $\mathrm{C…
Amplitude mode in a multi-gap superconductor MgB investigated by terahertz two-dimensional coherent spectroscopy
Kota Katsumi, Jiahao Liang, Ralph Romero +3
We have investigated the terahertz (THz) nonlinear response of the multigap superconductor MgB, using THz two-dimensional coherent spectroscopy (THz 2DCS). With broadband THz d…
Energy Relaxation and dynamics in the correlated metal SrRuO via THz two-dimensional coherent spectroscopy
David Barbalas, Ralph Romero, Dipanjan Chaudhuri +6
Separating out the contributions of different scattering channels in strongly interacting metals is crucial in identifying the mechanisms that govern their properties. While moment…
High-precision measurements of terahertz polarization states with a fiber coupled time-domain THz spectrometer
Zhenisbek Tagay, Ralph Romero, N. P. Armitage
We present a new method for high precision measurements of polarization rotation in the frequency range from 0.2 to 2.2 THz using a fiber coupled time-domain THz spectrometer. A fr…
Revealing novel aspects of light-matter coupling in terahertz two-dimensional coherent spectroscopy: the case of the amplitude mode in superconductors
Kota Katsumi, Jacopo Fiore, Mattia Udina +7
Recently developed terahertz (THz) two-dimensional coherent spectroscopy (2DCS) is a powerful technique to obtain materials information in a fashion qualitatively different from ot…