Abstract
We determine the phase diagram of excitons in a symmetric transition-metal dichalcogenide 3-layer heterostructure. First principles calculations reveal interlayer exciton states of a symmetric quadrupole, from which higher energy asymmetric dipole states are composed. We find quantum phase transitions between a repulsive quadrupolar and an attractive staggered dipolar lattice phases, driven by a competition between interactions and single exciton energies. The different internal quantum state of excitons in each phase is a striking example of a system where single-particle and interacting many-body states are coupled.
Original language | American English |
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Article number | 255301 |
Journal | Physical Review Letters |
Volume | 125 |
Issue number | 25 |
DOIs | |
State | Published - 18 Dec 2020 |
Bibliographical note
Funding Information:S. R. A. acknowledges support from the Israel Science Foundation, Grant No. 1208/19. S. G. acknowledges support from the Israel Science Foundation, Grant No. 1686/18. R. R. acknowledges support from the Israel Science Foundation, Grant No. 836/17, and the Bi-national Science Foundation, Grant No. 2016112. H. S. acknowledges support from Israeli Science Foundation Grant No. 861/19. This research used resources of the National Energy Research Scientific Computing Center (NERSC).
Publisher Copyright:
© 2020 American Physical Society.