Manipulation of Glassy State in Amorphous Selenium by Low-temperature Internal Friction Measurements
We have studied the thickness and quench-rate dependent internal friction of amorphous selenium (a-Se) thin films deposited at room temperature. The internal friction of a-Se films exhibit a temperature independent plateau below 1 K followed by a broad maximum at 10 K. The plateau, which is seen in...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2018-06-01
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| Series: | Materials Research |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392018000800211&tlng=en |
| _version_ | 1798015712065748992 |
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| author | Xiao Liu Thomas Harker Metcalf Matthew Robert Abernathy Richard Burnite Stephen |
| author_facet | Xiao Liu Thomas Harker Metcalf Matthew Robert Abernathy Richard Burnite Stephen |
| author_sort | Xiao Liu |
| collection | DOAJ |
| description | We have studied the thickness and quench-rate dependent internal friction of amorphous selenium (a-Se) thin films deposited at room temperature. The internal friction of a-Se films exhibit a temperature independent plateau below 1 K followed by a broad maximum at 10 K. The plateau, which is seen in almost all amorphous solids, is caused by dissipation by two-level tunneling systems (TLS), whose origin is still unknown. The maximum is caused by thermal relaxation over the same energy barrier that induces TLS. The internal friction and shear modulus are almost thickness independent from 100 nm to 10 µm. Unlike other elemental amorphous materials, the sufficiently low glass transition temperature (Tg) of a-Se (only about 10 K above room temperature) allows in-situ quench-rate dependent study of TLS. The amorphous structure resets itself by a thermal equilibration cycle above Tg. We show that a faster quench rate freezes a-Se to a lower density structure with a higher TLS density and vice versa. The changes are reversible supporting a relationship between different quenched states and the density of TLS. Our study shows that a-Se can be a simple monatomic amorphous system to constrain models for the origin of TLS in amorphous solids. |
| first_indexed | 2024-04-11T15:39:11Z |
| format | Article |
| id | doaj.art-6baee244df654f3280fa16919b301f05 |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-04-11T15:39:11Z |
| publishDate | 2018-06-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-6baee244df654f3280fa16919b301f052022-12-22T04:15:53ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392018-06-0121suppl 210.1590/1980-5373-mr-2017-0881Manipulation of Glassy State in Amorphous Selenium by Low-temperature Internal Friction MeasurementsXiao Liuhttps://orcid.org/0000-0001-9842-4415Thomas Harker Metcalfhttps://orcid.org/0000-0003-3592-314XMatthew Robert Abernathyhttps://orcid.org/0000-0001-9805-4311Richard Burnite Stephenhttps://orcid.org/0000-0002-7034-6141We have studied the thickness and quench-rate dependent internal friction of amorphous selenium (a-Se) thin films deposited at room temperature. The internal friction of a-Se films exhibit a temperature independent plateau below 1 K followed by a broad maximum at 10 K. The plateau, which is seen in almost all amorphous solids, is caused by dissipation by two-level tunneling systems (TLS), whose origin is still unknown. The maximum is caused by thermal relaxation over the same energy barrier that induces TLS. The internal friction and shear modulus are almost thickness independent from 100 nm to 10 µm. Unlike other elemental amorphous materials, the sufficiently low glass transition temperature (Tg) of a-Se (only about 10 K above room temperature) allows in-situ quench-rate dependent study of TLS. The amorphous structure resets itself by a thermal equilibration cycle above Tg. We show that a faster quench rate freezes a-Se to a lower density structure with a higher TLS density and vice versa. The changes are reversible supporting a relationship between different quenched states and the density of TLS. Our study shows that a-Se can be a simple monatomic amorphous system to constrain models for the origin of TLS in amorphous solids.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392018000800211&tlng=enInternal frictionamorphous seleniumelastic modulusspeed of soundtunneling systemsglass transition |
| spellingShingle | Xiao Liu Thomas Harker Metcalf Matthew Robert Abernathy Richard Burnite Stephen Manipulation of Glassy State in Amorphous Selenium by Low-temperature Internal Friction Measurements Materials Research Internal friction amorphous selenium elastic modulus speed of sound tunneling systems glass transition |
| title | Manipulation of Glassy State in Amorphous Selenium by Low-temperature Internal Friction Measurements |
| title_full | Manipulation of Glassy State in Amorphous Selenium by Low-temperature Internal Friction Measurements |
| title_fullStr | Manipulation of Glassy State in Amorphous Selenium by Low-temperature Internal Friction Measurements |
| title_full_unstemmed | Manipulation of Glassy State in Amorphous Selenium by Low-temperature Internal Friction Measurements |
| title_short | Manipulation of Glassy State in Amorphous Selenium by Low-temperature Internal Friction Measurements |
| title_sort | manipulation of glassy state in amorphous selenium by low temperature internal friction measurements |
| topic | Internal friction amorphous selenium elastic modulus speed of sound tunneling systems glass transition |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392018000800211&tlng=en |
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