268 citations · 1.6k across the 22 of their papers we have counts for
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cond-mat.supr-con2020★ 40 cited
Theory of optical responses in clean multi-band superconductors
Junyeong Ahn, Naoto Nagaosa
Electromagnetic responses in superconductors provide valuable information on the pairing symmetry as well as physical quantities such as the superfluid density. However, at the sup…
cond-mat.mes-hall2020★ 246 cited
Low-frequency divergence and quantum geometry of the bulk photovoltaic effect in topological semimetals
Junyeong Ahn, Guang-Yu Guo, Naoto Nagaosa
We study the low-frequency properties of the bulk photovoltaic effect in topological semimetals. The bulk photovoltaic effect is a nonlinear optical effect that generates DC photoc…
cond-mat.mes-hall2020★ 10 cited
Unconventional Majorana fermions on the surface of topological superconductors protected by rotational symmetry
Junyeong Ahn, Bohm-Jung Yang
Topological superconductors are exotic gapped phases of matter hosting Majorana mid-gap states on their boundary. In conventional topological superconductors, Majorana in-gap state…