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Crystallizing electrons with artificially patterned lattices
Trevor G. Stanfill, Daniel N. Shanks, Michael R. Koehler +6
Wigner crystals are typically confined to ultralow temperatures where thermal motion is frozen out. Moiré superlattices in twisted two-dimensional materials have extended their sta…
Dynamic Interfacial Quantum Dipoles in Charge Transfer Heterostructures
Ziyu Liu, Emil Viñas Boström, Dihao Sun +7
Hysteretic gate responses of two-dimensional material heterostructures serve as sensitive probes of the underlying electronic states and hold significant promise for the developmen…
Cryogenic Nano-Imaging of Excitons in a Monolayer Semiconductor
Anna Roche, Michael R. Koehler, David G. Mandrus +4
Excitons, Coulomb bound electron-hole pairs, dominate the optical response of two-dimensional semiconductors across near-infrared and visible frequencies due to their large binding…
Spontaneously formed phonon frequency combs in van der Waals solid CrXTe (X=Ge,Si)
Lebing Chen, Gaihua Ye, Cynthia Nnokwe +10
Optical phonon engineering through nonlinear effects has been utilized in ultrafast control of material properties. However, nonlinear optical phonons typically exhibit rapid decay…
Intrinsic Donor-Bound Excitons in Ultraclean Monolayer Semiconductors
Pasqual Rivera, Minhao He, Bumho Kim +16
The monolayer transition metal dichalcogenides are an emergent semiconductor platform exhibiting rich excitonic physics with coupled spin-valley degree of freedom and optical addre…
Nano-optical imaging of WSe2 waveguide modes revealing light-exciton interactions
Z. Fei, M. E. Scott, D. J. Gosztola +12
We report on nano-optical imaging study of WSe2 thin flakes with the scanning near-field optical microscopy (NSOM). The NSOM technique allows us to visualize in real space various…
Electrically Tunable Excitonic Light Emitting Diodes based on Monolayer WSe2 p-n Junctions
Jason S. Ross, Philip Klement, Aaron M. Jones +9
Light-emitting diodes are of importance for lighting, displays, optical interconnects, logic and sensors. Hence the development of new systems that allow improvements in their effi…