Optical Signatures of Periodic Charge Distribution in a Mott-like Correlated Insulator State
The elementary optical excitations in two-dimensional semiconductors hosting itinerant electrons are attractive and repulsive polarons—excitons that are dynamically screened by electrons. Exciton polarons have hitherto been studied in translationally invariant degenerate Fermi systems. Here, we show...
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American Physical Society
2021
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oai:doaj.org-article:964e84d34a574377a36ca7ebadf2be152021-12-02T17:21:40ZOptical Signatures of Periodic Charge Distribution in a Mott-like Correlated Insulator State10.1103/PhysRevX.11.0210272160-3308https://doaj.org/article/964e84d34a574377a36ca7ebadf2be152021-05-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.11.021027http://doi.org/10.1103/PhysRevX.11.021027https://doaj.org/toc/2160-3308The elementary optical excitations in two-dimensional semiconductors hosting itinerant electrons are attractive and repulsive polarons—excitons that are dynamically screened by electrons. Exciton polarons have hitherto been studied in translationally invariant degenerate Fermi systems. Here, we show that periodic distribution of electrons breaks the excitonic translational invariance and leads to a direct optical signature in the exciton-polaron spectrum. Specifically, we demonstrate that new optical resonances appear due to spatially modulated interactions between excitons and electrons in an incompressible Mott-like correlated state. Our observations demonstrate that resonant optical spectroscopy provides an invaluable tool for studying strongly correlated states, such as Wigner crystals and density waves, where exciton-electron interactions are modified by the emergence of charge order.Yuya ShimazakiClemens KuhlenkampIdo SchwartzTomasz SmoleńskiKenji WatanabeTakashi TaniguchiMartin KronerRichard SchmidtMichael KnapAtaç ImamoğluAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 11, Iss 2, p 021027 (2021) |
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DOAJ |
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DOAJ |
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EN |
| topic |
Physics QC1-999 |
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Physics QC1-999 Yuya Shimazaki Clemens Kuhlenkamp Ido Schwartz Tomasz Smoleński Kenji Watanabe Takashi Taniguchi Martin Kroner Richard Schmidt Michael Knap Ataç Imamoğlu Optical Signatures of Periodic Charge Distribution in a Mott-like Correlated Insulator State |
| description |
The elementary optical excitations in two-dimensional semiconductors hosting itinerant electrons are attractive and repulsive polarons—excitons that are dynamically screened by electrons. Exciton polarons have hitherto been studied in translationally invariant degenerate Fermi systems. Here, we show that periodic distribution of electrons breaks the excitonic translational invariance and leads to a direct optical signature in the exciton-polaron spectrum. Specifically, we demonstrate that new optical resonances appear due to spatially modulated interactions between excitons and electrons in an incompressible Mott-like correlated state. Our observations demonstrate that resonant optical spectroscopy provides an invaluable tool for studying strongly correlated states, such as Wigner crystals and density waves, where exciton-electron interactions are modified by the emergence of charge order. |
| format |
article |
| author |
Yuya Shimazaki Clemens Kuhlenkamp Ido Schwartz Tomasz Smoleński Kenji Watanabe Takashi Taniguchi Martin Kroner Richard Schmidt Michael Knap Ataç Imamoğlu |
| author_facet |
Yuya Shimazaki Clemens Kuhlenkamp Ido Schwartz Tomasz Smoleński Kenji Watanabe Takashi Taniguchi Martin Kroner Richard Schmidt Michael Knap Ataç Imamoğlu |
| author_sort |
Yuya Shimazaki |
| title |
Optical Signatures of Periodic Charge Distribution in a Mott-like Correlated Insulator State |
| title_short |
Optical Signatures of Periodic Charge Distribution in a Mott-like Correlated Insulator State |
| title_full |
Optical Signatures of Periodic Charge Distribution in a Mott-like Correlated Insulator State |
| title_fullStr |
Optical Signatures of Periodic Charge Distribution in a Mott-like Correlated Insulator State |
| title_full_unstemmed |
Optical Signatures of Periodic Charge Distribution in a Mott-like Correlated Insulator State |
| title_sort |
optical signatures of periodic charge distribution in a mott-like correlated insulator state |
| publisher |
American Physical Society |
| publishDate |
2021 |
| url |
https://doaj.org/article/964e84d34a574377a36ca7ebadf2be15 |
| work_keys_str_mv |
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1718381039865298944 |