Infrared Investigations of the Neutral-Ionic Phase Transition in TTF-CA and Its Dynamics
The neutral-ionic phase transition in TTF-CA was investigated by steady-state and time-resolved infrared spectroscopy. We describe the growth of high-quality single crystals and their characterization. Extended theoretical calculations were performed in order to obtain the band structure, the molecu...
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-01-01
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| Series: | Crystals |
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| Online Access: | http://www.mdpi.com/2073-4352/7/1/17 |
| _version_ | 1817992420119281664 |
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| author | Martin Dressel Tobias Peterseim |
| author_facet | Martin Dressel Tobias Peterseim |
| author_sort | Martin Dressel |
| collection | DOAJ |
| description | The neutral-ionic phase transition in TTF-CA was investigated by steady-state and time-resolved infrared spectroscopy. We describe the growth of high-quality single crystals and their characterization. Extended theoretical calculations were performed in order to obtain the band structure, the molecular vibrational modes and the optical spectra along all crystallographic axes. The theoretical results are compared to polarization-dependent infrared reflection experiments. The temperature-dependent optical conductivity is discussed in detail. We study the photo-induced phase transition in the vicinity of thermally-induced neutral-ionic transition. The observed temporal dynamics of the photo-induced states is attributed to the random-walk of neutral-ionic domain walls. We simulate the random-walk annihilation process of domain walls on a one-dimensional chain. |
| first_indexed | 2024-04-14T01:26:04Z |
| format | Article |
| id | doaj.art-3d3b1959198947348224878807019595 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-04-14T01:26:04Z |
| publishDate | 2017-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-3d3b19591989473482248788070195952022-12-22T02:20:25ZengMDPI AGCrystals2073-43522017-01-01711710.3390/cryst7010017cryst7010017Infrared Investigations of the Neutral-Ionic Phase Transition in TTF-CA and Its DynamicsMartin Dressel0Tobias Peterseim1Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, GermanyPhysikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart, GermanyThe neutral-ionic phase transition in TTF-CA was investigated by steady-state and time-resolved infrared spectroscopy. We describe the growth of high-quality single crystals and their characterization. Extended theoretical calculations were performed in order to obtain the band structure, the molecular vibrational modes and the optical spectra along all crystallographic axes. The theoretical results are compared to polarization-dependent infrared reflection experiments. The temperature-dependent optical conductivity is discussed in detail. We study the photo-induced phase transition in the vicinity of thermally-induced neutral-ionic transition. The observed temporal dynamics of the photo-induced states is attributed to the random-walk of neutral-ionic domain walls. We simulate the random-walk annihilation process of domain walls on a one-dimensional chain.http://www.mdpi.com/2073-4352/7/1/17charge-transfer saltsTTF-CAneutral-ionic phase transitioncrystal growthcharacterizationsteady-state and transient infrared spectroscopyvibrational spectroscopylight-induced phase transitiondomain-wall motionrandom-walk simulations |
| spellingShingle | Martin Dressel Tobias Peterseim Infrared Investigations of the Neutral-Ionic Phase Transition in TTF-CA and Its Dynamics Crystals charge-transfer salts TTF-CA neutral-ionic phase transition crystal growth characterization steady-state and transient infrared spectroscopy vibrational spectroscopy light-induced phase transition domain-wall motion random-walk simulations |
| title | Infrared Investigations of the Neutral-Ionic Phase Transition in TTF-CA and Its Dynamics |
| title_full | Infrared Investigations of the Neutral-Ionic Phase Transition in TTF-CA and Its Dynamics |
| title_fullStr | Infrared Investigations of the Neutral-Ionic Phase Transition in TTF-CA and Its Dynamics |
| title_full_unstemmed | Infrared Investigations of the Neutral-Ionic Phase Transition in TTF-CA and Its Dynamics |
| title_short | Infrared Investigations of the Neutral-Ionic Phase Transition in TTF-CA and Its Dynamics |
| title_sort | infrared investigations of the neutral ionic phase transition in ttf ca and its dynamics |
| topic | charge-transfer salts TTF-CA neutral-ionic phase transition crystal growth characterization steady-state and transient infrared spectroscopy vibrational spectroscopy light-induced phase transition domain-wall motion random-walk simulations |
| url | http://www.mdpi.com/2073-4352/7/1/17 |
| work_keys_str_mv | AT martindressel infraredinvestigationsoftheneutralionicphasetransitioninttfcaanditsdynamics AT tobiaspeterseim infraredinvestigationsoftheneutralionicphasetransitioninttfcaanditsdynamics |