Quadrupolar–dipolar excitonic transition in a tunnel-coupled van der Waals heterotrilayer

Article Article scientifique Article Quadrupolar–dipolar excitonic transition in a tunnel-coupled van der Waals heterotrilayer eng 2023-10-19 2023-12 author Li Weijie 0000-0003-0893-0352 Department of Physics, Emory University, Atlanta, GA, USA. author Hadjri Zacharia James Department of Physics, Emory University, Atlanta, GA, USA. 416971 author Devenica Luka Matej Department of Physics, Emory University, Atlanta, GA, USA. 416969 author Zhang Jin 0000-0001-7830-3464 Center for Free Electron Laser Science, Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany. 78468 author Liu Song Department of Mechanical Engineering, Columbia University, New York, NY, USA.,Institute of Microelectronics, Chinese Academy of Sciences, Beijing, China. 421699 author Hone James 0000-0002-8084-3301 Department of Mechanical Engineering, Columbia University, New York, NY, USA. author Watanabe Kenji 0000-0003-3701-8119 Research Center for Electronic and Optical Materials, National Institute for Materials Science, Tsukuba, Japan. author Taniguchi Takashi 0000-0002-1467-3105 Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan. author Zorrilla-Rubio Angel 0000-0003-2060-3151 Center for Free Electron Laser Science, Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany.,Center for Computational Quantum Physics, Simons Foundation Flatiron Institute, New York, NY, USA.,Nano-BioSpectroscopy Group, Departamento de Fisica de Materiales, Universidad del País Vasco, San Sebastián, Spain. 47537 author Srivastava Ajit 0000-0003-1482-9293 Department of Physics, Emory University, Atlanta, GA, USA. ajit.srivastava@emory.edu.,Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland. ajit.srivastava@emory.edu. 412232 Département de physique de la matière quantique (FIMAC) 1478-1484 10.1038/s41563-023-01667-1 37857887 1476-1122 https://www.nature.com/articles/s41563-023-01667-1 Strongly bound excitons determine light-matter interactions in van der Waals heterostructures of two-dimensional semiconductors. Unlike fundamental particles, quasiparticles in condensed matter, such as excitons, can be tailored to alter their interactions and realize emergent quantum phases. Here, using a WS2 /WSe2 /WS2 heterotrilayer, we create a quantum superposition of oppositely oriented dipolar excitons-a quadrupolar exciton-wherein an electron is layer-hybridized in WS2 layers while the hole localizes in WSe2 . In contrast to dipolar excitons, symmetric quadrupolar excitons only redshift in an out-of-plane electric field. 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. 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. E-dependent PL of trilayer excitons. The three-peak structure only redshifts with electric field. Trilayer excitons Electric field Dewey 500.2 33 Département de physique de la matière quantique 131 false 1418 Groupe Srivastava Nature materials 22 12 977ed658-39bb-4735-b24b-e36ad8267903 Article (Published version) Restricted Article_scientifique_from_crossref.pdf 2143618 application/pdf a8efdbc0c9cea96d065e1deafea4f3e1f1f3ff3969b5abf2945b173230fbc034 Vignette Public articlemini.png 342508 image/png restrictedAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique

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Quadrupolar–dipolar excitonic transition in a tunnel-coupled van der Waals heterotrilayer	Nature materials			2023	8	0

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