Effect of phonon focusing on Knudsen flow of phonon gas in single-crystal nanowires made of spintronics materials
Effect of anisotropy of elastic energy on the phonon propagation in single-crystal nanowires made of Fe, Cu, MgO, InSb, and GaAs materials that are used to fabricate spintronics devices in the regime of the Knudsen flow of phonon gas has been studied. A new method of analyzing the focusing of quasi-...
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| Veröffentlicht in: | Physics of metals and metallography 2017, Vol.118 (1), p.10-20 |
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| creator | Kuleev, I. I. Bakharev, S. M. Kuleev, I. G. Ustinov, V. V. |
| description | Effect of anisotropy of elastic energy on the phonon propagation in single-crystal nanowires made of Fe, Cu, MgO, InSb, and GaAs materials that are used to fabricate spintronics devices in the regime of the Knudsen flow of phonon gas has been studied. A new method of analyzing the focusing of quasi-transverse modes has been suggested, which made it possible to determine the average values of the densities of phonon states in the regions of focusing and defocusing slow and fast quasi-transverse modes. The effect of phonon focusing on the anisotropy of heat conductivity and lengths of the phonon free paths has been analyzed for all acoustic modes that exist in spintronics nanostructures. It has been shown that for all the nanowires investigated the angular dependences of the free paths of fast and slow transverse modes in the {100} and {110} planes correlate with the angular dependences of the densities of phonon states for these modes. Directions of the heat flux that ensure the maximum and minimum phonon heat conductivity in the nanowires have been determined. |
| doi_str_mv | 10.1134/S0031918X17010033 |
| format | Article |
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I. ; Bakharev, S. M. ; Kuleev, I. G. ; Ustinov, V. V.</creator><creatorcontrib>Kuleev, I. I. ; Bakharev, S. M. ; Kuleev, I. G. ; Ustinov, V. V.</creatorcontrib><description>Effect of anisotropy of elastic energy on the phonon propagation in single-crystal nanowires made of Fe, Cu, MgO, InSb, and GaAs materials that are used to fabricate spintronics devices in the regime of the Knudsen flow of phonon gas has been studied. A new method of analyzing the focusing of quasi-transverse modes has been suggested, which made it possible to determine the average values of the densities of phonon states in the regions of focusing and defocusing slow and fast quasi-transverse modes. The effect of phonon focusing on the anisotropy of heat conductivity and lengths of the phonon free paths has been analyzed for all acoustic modes that exist in spintronics nanostructures. It has been shown that for all the nanowires investigated the angular dependences of the free paths of fast and slow transverse modes in the {100} and {110} planes correlate with the angular dependences of the densities of phonon states for these modes. Directions of the heat flux that ensure the maximum and minimum phonon heat conductivity in the nanowires have been determined.</description><identifier>ISSN: 0031-918X</identifier><identifier>EISSN: 1555-6190</identifier><identifier>DOI: 10.1134/S0031918X17010033</identifier><language>eng</language><publisher>Moscow: Pleiades Publishing</publisher><subject>Analysis ; Anisotropy ; Chemistry and Materials Science ; Density ; Electric properties ; Gallium arsenide ; Knudsen flow ; Materials Science ; Metallic Materials ; Nanowires ; Phonons ; Single crystals ; Spintronics ; Theory of Metals ; Thermal conductivity</subject><ispartof>Physics of metals and metallography, 2017, Vol.118 (1), p.10-20</ispartof><rights>Pleiades Publishing, Ltd. 2017</rights><rights>COPYRIGHT 2017 Springer</rights><rights>Physics of Metals and Metallography is a copyright of Springer, 2017.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c388t-6c0d48b36609fb5c451027904ab6dd470e2f6622be036b46daf681ca6a88203a3</citedby><cites>FETCH-LOGICAL-c388t-6c0d48b36609fb5c451027904ab6dd470e2f6622be036b46daf681ca6a88203a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1134/S0031918X17010033$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1134/S0031918X17010033$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Kuleev, I. I.</creatorcontrib><creatorcontrib>Bakharev, S. M.</creatorcontrib><creatorcontrib>Kuleev, I. G.</creatorcontrib><creatorcontrib>Ustinov, V. V.</creatorcontrib><title>Effect of phonon focusing on Knudsen flow of phonon gas in single-crystal nanowires made of spintronics materials</title><title>Physics of metals and metallography</title><addtitle>Phys. Metals Metallogr</addtitle><description>Effect of anisotropy of elastic energy on the phonon propagation in single-crystal nanowires made of Fe, Cu, MgO, InSb, and GaAs materials that are used to fabricate spintronics devices in the regime of the Knudsen flow of phonon gas has been studied. A new method of analyzing the focusing of quasi-transverse modes has been suggested, which made it possible to determine the average values of the densities of phonon states in the regions of focusing and defocusing slow and fast quasi-transverse modes. The effect of phonon focusing on the anisotropy of heat conductivity and lengths of the phonon free paths has been analyzed for all acoustic modes that exist in spintronics nanostructures. It has been shown that for all the nanowires investigated the angular dependences of the free paths of fast and slow transverse modes in the {100} and {110} planes correlate with the angular dependences of the densities of phonon states for these modes. Directions of the heat flux that ensure the maximum and minimum phonon heat conductivity in the nanowires have been determined.</description><subject>Analysis</subject><subject>Anisotropy</subject><subject>Chemistry and Materials Science</subject><subject>Density</subject><subject>Electric properties</subject><subject>Gallium arsenide</subject><subject>Knudsen flow</subject><subject>Materials Science</subject><subject>Metallic Materials</subject><subject>Nanowires</subject><subject>Phonons</subject><subject>Single crystals</subject><subject>Spintronics</subject><subject>Theory of Metals</subject><subject>Thermal conductivity</subject><issn>0031-918X</issn><issn>1555-6190</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp1kU1LxDAQhoMouH78AG8FL16q-WqaHmXxCwUPKngraTqpWdpkN2kR_70p62FRJIcZ3nmeMDAInRF8SQjjVy8YM1IR-U5KTFLP9tCCFEWRC1LhfbSYx_k8P0RHMa4w5pwLtkCbG2NAj5k32frDO-8y4_UUreuy1D-6qY2Qst5_7iCdipl12Uz1kOvwFUfVZ045_2kDxGxQLcx4XFs3Bu-snrMRglV9PEEHJhU4_anH6O325nV5nz893z0sr59yzaQcc6Fxy2XDhMCVaQrNC4JpWWGuGtG2vMRAjRCUNoCZaLholRGSaCWUlBQzxY7RxfbfdfCbCeJYDzZq6HvlwE-xJlJygitKy4Se_0JXfgoubZeokhS0kJwl6nJLdaqH2jrjx6B0ei0MVnsHxqb8mlelKCmjMglkK-jgYwxg6nWwgwpfNcH1fLX6z9WSQ7dOTKzrIOys8q_0DUB3mSU</recordid><startdate>2017</startdate><enddate>2017</enddate><creator>Kuleev, I. 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A new method of analyzing the focusing of quasi-transverse modes has been suggested, which made it possible to determine the average values of the densities of phonon states in the regions of focusing and defocusing slow and fast quasi-transverse modes. The effect of phonon focusing on the anisotropy of heat conductivity and lengths of the phonon free paths has been analyzed for all acoustic modes that exist in spintronics nanostructures. It has been shown that for all the nanowires investigated the angular dependences of the free paths of fast and slow transverse modes in the {100} and {110} planes correlate with the angular dependences of the densities of phonon states for these modes. Directions of the heat flux that ensure the maximum and minimum phonon heat conductivity in the nanowires have been determined.</abstract><cop>Moscow</cop><pub>Pleiades Publishing</pub><doi>10.1134/S0031918X17010033</doi><tpages>11</tpages></addata></record> |
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| subjects | Analysis Anisotropy Chemistry and Materials Science Density Electric properties Gallium arsenide Knudsen flow Materials Science Metallic Materials Nanowires Phonons Single crystals Spintronics Theory of Metals Thermal conductivity |
| title | Effect of phonon focusing on Knudsen flow of phonon gas in single-crystal nanowires made of spintronics materials |
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