Evidence for d-wave superconductivity of infinite-layer nickelates from low-energy electrodynamics

B Cheng, D Cheng, K Lee, L Luo, Z Chen, Y Lee… - Nature Materials, 2024 - nature.com
The discovery of superconductivity in infinite-layer nickelates established another category
of unconventional superconductors that shares structural and electronic similarities with …

A light-induced phononic symmetry switch and giant dissipationless topological photocurrent in ZrTe5

L Luo, D Cheng, B Song, LL Wang, C Vaswani… - Nature Materials, 2021 - nature.com
Dissipationless currents from topologically protected states are promising for disorder-
tolerant electronics and quantum computation. Here, we photogenerate giant anisotropic …

Quantum coherence tomography of light-controlled superconductivity

L Luo, M Mootz, JH Kang, C Huang, K Eom, JW Lee… - Nature Physics, 2023 - nature.com
The coupling between superconductors and oscillation cycles of light pulses, ie, lightwave
engineering, is an emerging control concept for superconducting quantum electronics …

Lightwave-driven gapless superconductivity and forbidden quantum beats by terahertz symmetry breaking

X Yang, C Vaswani, C Sundahl, M Mootz, L Luo… - Nature …, 2019 - nature.com
Light-induced supercurrents chart a path forward for the electromagnetic design of emergent
materials phases and collective modes for quantum engineering applications. However …

Light-driven Raman coherence as a nonthermal route to ultrafast topology switching in a Dirac semimetal

C Vaswani, LL Wang, DH Mudiyanselage, Q Li… - Physical Review X, 2020 - APS
A grand challenge underlies the entire field of topology-enabled quantum logic and
information science: how to establish topological control principles driven by quantum …

Phase-resolved Higgs response in superconducting cuprates

H Chu, MJ Kim, K Katsumi, S Kovalev… - Nature …, 2020 - nature.com
In high-energy physics, the Higgs field couples to gauge bosons and fermions and gives
mass to their elementary excitations. Experimentally, such couplings can be inferred from …

Light quantum control of persisting Higgs modes in iron-based superconductors

C Vaswani, JH Kang, M Mootz, L Luo, X Yang… - Nature …, 2021 - nature.com
The Higgs mechanism, ie, spontaneous symmetry breaking of the quantum vacuum, is a
cross-disciplinary principle, universal for understanding dark energy, antimatter and …

Terahertz second-harmonic generation from lightwave acceleration of symmetry-breaking nonlinear supercurrents

C Vaswani, M Mootz, C Sundahl, DH Mudiyanselage… - Physical Review Letters, 2020 - APS
We report terahertz (THz) light-induced second harmonic generation, in superconductors
with inversion symmetry that forbid even-order nonlinearities. The THz second harmonic …

Chirality manipulation of ultrafast phase switches in a correlated CDW-Weyl semimetal

B Cheng, D Cheng, T Jiang, W **a, B Song… - Nature …, 2024 - nature.com
Light engineering of correlated states in topological materials provides a new avenue of
achieving exotic topological phases inaccessible by conventional tuning methods. Here we …

Terahertz nanoimaging of perovskite solar cell materials

RHJ Kim, Z Liu, C Huang, JM Park, SJ Haeuser… - ACS …, 2022 - ACS Publications
Direct visualization and quantitative evaluation of charge filling in grain boundary (GB) traps
of hybrid metal halide perovskites require dynamic conductivity imaging simultaneously at …