Extremely imbalanced two-dimensional electron-hole-photon systems
We investigate the phases of two-dimensional electron-hole systems strongly coupled to a microcavity photon field in the limit of extreme charge imbalance. Using variational wave functions, we examine the competition between different electron-hole paired states for the specific cases of semiconduct...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020-04-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.023089 |
| _version_ | 1797211495489077248 |
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| author | A. Tiene J. Levinsen M. M. Parish A. H. MacDonald J. Keeling F. M. Marchetti |
| author_facet | A. Tiene J. Levinsen M. M. Parish A. H. MacDonald J. Keeling F. M. Marchetti |
| author_sort | A. Tiene |
| collection | DOAJ |
| description | We investigate the phases of two-dimensional electron-hole systems strongly coupled to a microcavity photon field in the limit of extreme charge imbalance. Using variational wave functions, we examine the competition between different electron-hole paired states for the specific cases of semiconducting III-V single quantum wells, electron-hole bilayers, and transition-metal dichalcogenide monolayers embedded in a planar microcavity. We show how the Fermi sea of excess charges modifies both the electron-hole bound state (exciton) properties and the dielectric constant of the cavity active medium, which in turn affects the photon component of the many-body polariton ground state. On the one hand, long-range Coulomb interactions and Pauli blocking of the Fermi sea promote electron-hole pairing with finite center-of-mass momentum, corresponding to an excitonic roton minimum. On the other hand, the strong coupling to the ultra-low-mass cavity photon mode favors zero-momentum pairs. We discuss the prospect of observing different types of electron-hole pairing in the photon spectrum. |
| first_indexed | 2024-04-24T10:27:24Z |
| format | Article |
| id | doaj.art-c5bb69d9d6af403e93d38d710cf9fee1 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:27:24Z |
| publishDate | 2020-04-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-c5bb69d9d6af403e93d38d710cf9fee12024-04-12T16:53:11ZengAmerican Physical SocietyPhysical Review Research2643-15642020-04-012202308910.1103/PhysRevResearch.2.023089Extremely imbalanced two-dimensional electron-hole-photon systemsA. TieneJ. LevinsenM. M. ParishA. H. MacDonaldJ. KeelingF. M. MarchettiWe investigate the phases of two-dimensional electron-hole systems strongly coupled to a microcavity photon field in the limit of extreme charge imbalance. Using variational wave functions, we examine the competition between different electron-hole paired states for the specific cases of semiconducting III-V single quantum wells, electron-hole bilayers, and transition-metal dichalcogenide monolayers embedded in a planar microcavity. We show how the Fermi sea of excess charges modifies both the electron-hole bound state (exciton) properties and the dielectric constant of the cavity active medium, which in turn affects the photon component of the many-body polariton ground state. On the one hand, long-range Coulomb interactions and Pauli blocking of the Fermi sea promote electron-hole pairing with finite center-of-mass momentum, corresponding to an excitonic roton minimum. On the other hand, the strong coupling to the ultra-low-mass cavity photon mode favors zero-momentum pairs. We discuss the prospect of observing different types of electron-hole pairing in the photon spectrum.http://doi.org/10.1103/PhysRevResearch.2.023089 |
| spellingShingle | A. Tiene J. Levinsen M. M. Parish A. H. MacDonald J. Keeling F. M. Marchetti Extremely imbalanced two-dimensional electron-hole-photon systems Physical Review Research |
| title | Extremely imbalanced two-dimensional electron-hole-photon systems |
| title_full | Extremely imbalanced two-dimensional electron-hole-photon systems |
| title_fullStr | Extremely imbalanced two-dimensional electron-hole-photon systems |
| title_full_unstemmed | Extremely imbalanced two-dimensional electron-hole-photon systems |
| title_short | Extremely imbalanced two-dimensional electron-hole-photon systems |
| title_sort | extremely imbalanced two dimensional electron hole photon systems |
| url | http://doi.org/10.1103/PhysRevResearch.2.023089 |
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