Laser cutting single line font10/28/2023 Our results present van der Waals heterotrilayers as a field-tunable platform to engineer light–matter interactions and explore quantum phase transitions between spontaneously ordered many-exciton phases. At higher densities and a finite electric field, the nonlinear Stark shift of quadrupolar excitons becomes linear, signalling a transition to dipolar excitons resulting from exciton–exciton interactions, while at a vanishing electric field, the reduced exchange interaction suggests antiferroelectric correlations between dipolar excitons. In contrast to dipolar excitons, symmetric quadrupolar excitons only redshift in an out-of-plane electric field. Here, using a WS 2/WSe 2/WS 2 heterotrilayer, we create a quantum superposition of oppositely oriented dipolar excitons-a quadrupolar exciton-wherein an electron is layer-hybridized in WS 2 layers while the hole localizes in WSe 2. Unlike fundamental particles, quasiparticles in condensed matter, such as excitons, can be tailored to alter their interactions and realize emergent quantum phases. Strongly bound excitons determine light–matter interactions in van der Waals heterostructures of two-dimensional semiconductors.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |