In gapped graphene, the Berry connection produces a spectral component in attosecond transient absorption that oscillates at the pump frequency rather than only at twice it.
Figures 4(a) and 4(b) display the analytical spectra ∆ SA kK1 and ∆ SA kK2 , respectively
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Effect of Berry connection on attosecond transient absorption spectroscopy in gapped graphene
In gapped graphene, the Berry connection produces a spectral component in attosecond transient absorption that oscillates at the pump frequency rather than only at twice it.