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Evidence for equilibrium excitons and exciton condensation in monolayer WTe2
Bosong Sun, Wenjin Zhao, Tauno Palomaki +14
A single monolayer of the layered semimetal WTe2 behaves as a two-dimensional topological insulator, with helical conducting edge modes surrounding a bulk state that becomes insula…
Symmetry-broken Chern insulators in twisted double bilayer graphene
Minhao He, Jiaqi Cai, Ya-Hui Zhang +7
Twisted double bilayer graphene (tDBG) has emerged as an especially rich platform for studying strongly correlated and topological states of matter. The material features moiré ban…
Coherent strong-coupling of terahertz magnons and phonons in a Van der Waals antiferromagnetic insulator
Qi Zhang, Mykhaylo Ozerov, Emil Vinas Boström +10
Emergent cooperative motions of individual degrees of freedom, i.e. collective excitations, govern the low-energy response of system ground states under external stimulations and p…
Long-range transport of 2D excitons with acoustic waves
Ruoming Peng, Adina Ripin, Yusen Ye +9
Excitons are elementary optical excitation in semiconductors. The ability to manipulate and transport these quasiparticles would enable excitonic circuits and devices for quantum p…
Electric control of a canted-antiferromagnetic Chern insulator
Jiaqi Cai, Dmitry Ovchinnikov, Zaiyao Fei +11
The interplay between band topology and magnetism can give rise to exotic states of matter. For example, magnetically doped topological insulators can realize a Chern insulator tha…
Even-Odd Layer-Dependent Anomalous Hall Effect in Topological Magnet MnBi2Te4 Thin Films
Yi-Fan Zhao, Ling-Jie Zhou, Fei Wang +10
A central theme in condensed matter physics is to create and understand the exotic states of matter by incorporating magnetism into topological materials. One prime example is the…