Topologically protected excitons in porphyrin thin films
he control of exciton transport in organic materials is of fundamental importance for the development of efficient light-harvesting systems. This transport is easily deteriorated by traps in the disordered energy landscape. Here, we propose and analyse a system that supports topological Frenkel exci...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | en_US |
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Nature Publishing Group
2015
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| Online Access: | http://hdl.handle.net/1721.1/95950 https://orcid.org/0000-0001-5039-4085 |
| _version_ | 1826213859114876928 |
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| author | Saikin, Semion K. Yao, Norman Y. Yuen, Joel Aspuru-Guzik, Alan |
| author2 | Massachusetts Institute of Technology. Research Laboratory of Electronics |
| author_facet | Massachusetts Institute of Technology. Research Laboratory of Electronics Saikin, Semion K. Yao, Norman Y. Yuen, Joel Aspuru-Guzik, Alan |
| author_sort | Saikin, Semion K. |
| collection | MIT |
| description | he control of exciton transport in organic materials is of fundamental importance for the development of efficient light-harvesting systems. This transport is easily deteriorated by traps in the disordered energy landscape. Here, we propose and analyse a system that supports topological Frenkel exciton edge states. Backscattering of these chiral Frenkel excitons is prohibited by symmetry, ensuring that the transport properties of such a system are robust against disorder. To implement our idea, we propose a two-dimensional periodic array of tilted porphyrins interacting with a homogeneous magnetic field. This field serves to break time-reversal symmetry and results in lattice fluxes that mimic the Aharonov–Bohm phase acquired by electrons. Our proposal is the first blueprint for realizing topological phases of matter in molecular aggregates and suggests a paradigm for engineering novel excitonic materials. |
| first_indexed | 2024-09-23T15:55:39Z |
| format | Article |
| id | mit-1721.1/95950 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:55:39Z |
| publishDate | 2015 |
| publisher | Nature Publishing Group |
| record_format | dspace |
| spelling | mit-1721.1/959502022-09-29T17:05:59Z Topologically protected excitons in porphyrin thin films Saikin, Semion K. Yao, Norman Y. Yuen, Joel Aspuru-Guzik, Alan Massachusetts Institute of Technology. Research Laboratory of Electronics Yuen, Joel Saikin, Semion K. Aspuru-Guzik, Alan he control of exciton transport in organic materials is of fundamental importance for the development of efficient light-harvesting systems. This transport is easily deteriorated by traps in the disordered energy landscape. Here, we propose and analyse a system that supports topological Frenkel exciton edge states. Backscattering of these chiral Frenkel excitons is prohibited by symmetry, ensuring that the transport properties of such a system are robust against disorder. To implement our idea, we propose a two-dimensional periodic array of tilted porphyrins interacting with a homogeneous magnetic field. This field serves to break time-reversal symmetry and results in lattice fluxes that mimic the Aharonov–Bohm phase acquired by electrons. Our proposal is the first blueprint for realizing topological phases of matter in molecular aggregates and suggests a paradigm for engineering novel excitonic materials. United States. Dept. of Energy. Office of Basic Energy Sciences (Award DESC0001088) United States. Defense Threat Reduction Agency (Grant HDTRA1-10-1-0046) 2015-03-11T16:44:12Z 2015-03-11T16:44:12Z 2014-09 2014-03 Article http://purl.org/eprint/type/JournalArticle 1476-1122 1476-4660 http://hdl.handle.net/1721.1/95950 Yuen-Zhou, Joel, Semion K. Saikin, Norman Y. Yao, and Alán Aspuru-Guzik. “Topologically Protected Excitons in Porphyrin Thin Films.” Nature Materials 13, no. 11 (September 21, 2014): 1026–1032. © 2014 Macmillan Publishers Ltd https://orcid.org/0000-0001-5039-4085 en_US http://dx.doi.org/10.1038/nmat4073 Nature Materials Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Nature Publishing Group Nature |
| spellingShingle | Saikin, Semion K. Yao, Norman Y. Yuen, Joel Aspuru-Guzik, Alan Topologically protected excitons in porphyrin thin films |
| title | Topologically protected excitons in porphyrin thin films |
| title_full | Topologically protected excitons in porphyrin thin films |
| title_fullStr | Topologically protected excitons in porphyrin thin films |
| title_full_unstemmed | Topologically protected excitons in porphyrin thin films |
| title_short | Topologically protected excitons in porphyrin thin films |
| title_sort | topologically protected excitons in porphyrin thin films |
| url | http://hdl.handle.net/1721.1/95950 https://orcid.org/0000-0001-5039-4085 |
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