138 citations · 486 across the 9 of their papers we have counts for
16 papers
Electric-field-tunable intervalley excitons and phonon replicas in bilayer WSe
Mashael M. Altaiary, Erfu Liu, Ching-Tarng Liang +7
We report the direct observation of intervalley exciton between the Q conduction valley and valence valley in bilayer WSe by photoluminescence. The Q exciton lies at ~18…
Excitonic and valleytronic signatures of correlated states at fractional fillings of a moiré superlattice
Erfu Liu, Takashi Taniguchi, Kenji Watanabe +3
Moiré superlattices are excellent platforms to realize strongly correlated quantum phenomena, such as Mott insulation and superconductivity. In particular, recent research has reve…
Gate-tunable exciton-polaron Rydberg series with strong roton effect
Erfu Liu, Jeremiah van Baren, Zhengguang Lu +5
The electronic exciton polaron is a hypothetical many-body quasiparticle formed by an exciton dressed with a polarized electron-hole cloud in the Fermi sea (FS). It is predicted to…
Multipath optical recombination of intervalley dark excitons and trions in monolayer WSe
Erfu Liu, Jeremiah van Baren, Ching-Tarng Liang +5
Excitons and trions (or exciton-polarons) in transition metal dichalcogenides (TMDs) are known to decay predominantly through intravalley transitions. Electron-hole recombination a…
Landau-quantized excitonic absorption and luminescence in a monolayer valley semiconductor
Erfu Liu, Jeremiah van Baren, Takashi Taniguchi +3
We investigate Landau-quantized excitonic absorption and luminescence of monolayer WSe under magnetic field. We observe gate-dependent quantum oscillations in the bright excito…
Valley-selective chiral phonon replicas of dark excitons and trions in monolayer WSe2
Erfu Liu, Jeremiah van Baren, Takashi Taniguchi +3
We observe a set of three replica luminescent peaks at ~21.4 meV below the dark exciton, negative and positive dark trions (or exciton-polarons) in monolayer WSe2. The replica reds…