α-Scale decoupling of the mechanical relaxation and diverging shear wave propagation length scale in triphenylphosphite
We have performed depolarized impulsive stimulated scattering experiments to observe shear acoustic phonons in supercooled triphenylphosphite (TPP) from ∼10–500 MHz. These measurements, in tandem with previously performed longitudinal and shear measurements, permit further analyses of the relaxation...
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| Format: | Article |
| Language: | en_US |
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American Institute of Physics (AIP)
2013
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| Online Access: | http://hdl.handle.net/1721.1/82543 https://orcid.org/0000-0001-7804-5418 https://orcid.org/0000-0001-9157-6491 |
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| author | Torchinsky, Darius H. Johnson, Jeremiah A. Nelson, Keith Adam |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Torchinsky, Darius H. Johnson, Jeremiah A. Nelson, Keith Adam |
| author_sort | Torchinsky, Darius H. |
| collection | MIT |
| description | We have performed depolarized impulsive stimulated scattering experiments to observe shear acoustic phonons in supercooled triphenylphosphite (TPP) from ∼10–500 MHz. These measurements, in tandem with previously performed longitudinal and shear measurements, permit further analyses of the relaxation dynamics of TPP within the framework of the mode coupling theory. Our results provide evidence of α coupling between the shear and longitudinal degrees of freedom up to a decoupling temperature T [subscript c] = 231 K. A lower bound length scale of shear wave propagation in liquids verified the exponent predicted by theory in the vicinity of the decoupling temperature. |
| first_indexed | 2024-09-23T11:49:49Z |
| format | Article |
| id | mit-1721.1/82543 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:49:49Z |
| publishDate | 2013 |
| publisher | American Institute of Physics (AIP) |
| record_format | dspace |
| spelling | mit-1721.1/825432022-09-27T22:11:30Z α-Scale decoupling of the mechanical relaxation and diverging shear wave propagation length scale in triphenylphosphite Torchinsky, Darius H. Johnson, Jeremiah A. Nelson, Keith Adam Massachusetts Institute of Technology. Department of Chemistry Massachusetts Institute of Technology. Department of Physics Torchinsky, Darius H. Johnson, Jeremiah A. Nelson, Keith Adam We have performed depolarized impulsive stimulated scattering experiments to observe shear acoustic phonons in supercooled triphenylphosphite (TPP) from ∼10–500 MHz. These measurements, in tandem with previously performed longitudinal and shear measurements, permit further analyses of the relaxation dynamics of TPP within the framework of the mode coupling theory. Our results provide evidence of α coupling between the shear and longitudinal degrees of freedom up to a decoupling temperature T [subscript c] = 231 K. A lower bound length scale of shear wave propagation in liquids verified the exponent predicted by theory in the vicinity of the decoupling temperature. National Science Foundation (U.S.) (Grant CHE-0616939) National Science Foundation (U.S.) (Grant IMR-0414895) 2013-11-22T15:31:30Z 2013-11-22T15:31:30Z 2012-05 2011-06 Article http://purl.org/eprint/type/JournalArticle 00219606 1089-7690 http://hdl.handle.net/1721.1/82543 Torchinsky, Darius H.; Johnson, Jeremy A.; Nelson, Keith A. J. Chem. Phys. 136, 174509 (2012). © 2012 American Institute of Physics https://orcid.org/0000-0001-7804-5418 https://orcid.org/0000-0001-9157-6491 en_US http://dx.doi.org/10.1063/1.3700756 The Journal of Chemical Physics 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 American Institute of Physics (AIP) MIT web domain |
| spellingShingle | Torchinsky, Darius H. Johnson, Jeremiah A. Nelson, Keith Adam α-Scale decoupling of the mechanical relaxation and diverging shear wave propagation length scale in triphenylphosphite |
| title | α-Scale decoupling of the mechanical relaxation and diverging shear wave propagation length scale in triphenylphosphite |
| title_full | α-Scale decoupling of the mechanical relaxation and diverging shear wave propagation length scale in triphenylphosphite |
| title_fullStr | α-Scale decoupling of the mechanical relaxation and diverging shear wave propagation length scale in triphenylphosphite |
| title_full_unstemmed | α-Scale decoupling of the mechanical relaxation and diverging shear wave propagation length scale in triphenylphosphite |
| title_short | α-Scale decoupling of the mechanical relaxation and diverging shear wave propagation length scale in triphenylphosphite |
| title_sort | α scale decoupling of the mechanical relaxation and diverging shear wave propagation length scale in triphenylphosphite |
| url | http://hdl.handle.net/1721.1/82543 https://orcid.org/0000-0001-7804-5418 https://orcid.org/0000-0001-9157-6491 |
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