{"_buckets": {"deposit": "35b2fcd0-5378-47fb-b22a-94cd3651cb47"}, "_deposit": {"id": "2011296", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "2011296"}, "status": "published"}, "_oai": {"id": "oai:u-ryukyu.repo.nii.ac.jp:02011296", "sets": ["1642838338003", "1642838406414"]}, "author_link": [], "item_1617186331708": {"attribute_name": "Title", "attribute_value_mlt": [{"subitem_1551255647225": "Simultaneous structure and carrier tuning of dimorphic clathrate Ba_8Ga_\u003c16\u003eSn_\u003c30\u003e", "subitem_1551255648112": "en"}]}, "item_1617186419668": {"attribute_name": "Creator", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Suekuni, K.", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Avila, M. A.", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Umeo, K.", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Fukuoka, H.", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Yamanaka, S.", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Nakagawa, T.", "creatorNameLang": "en"}]}, {"creatorNames": [{"creatorName": "Takabatake, T.", "creatorNameLang": "en"}]}]}, "item_1617186476635": {"attribute_name": "Access Rights", "attribute_value_mlt": [{"subitem_1522299639480": "open access", "subitem_1600958577026": "http://purl.org/coar/access_right/c_abf2"}]}, "item_1617186499011": {"attribute_name": "Rights", "attribute_value_mlt": [{"subitem_1522650717957": "ja", "subitem_1522651041219": "©2008 American Physical Society"}]}, "item_1617186626617": {"attribute_name": "Description", "attribute_value_mlt": [{"subitem_description": "We report structural, transport, and thermal properties of carrier-tuned Ba_8Ga_\u003c16\u003eSn_\u003c30\u003e single crystals with the type-1 clathrate structure (β phase), demonstrating that Ba_8Ga_\u003c16\u003eSn_\u003c30\u003e is a unique thermoelectric clathrate material wherein both the structure type and the carrier type are tunable. The results are compared with the properties of the better known type-8 structure (α phase) and of A_8Ga_\u003c16\u003eGe_\u003c30\u003e (A=Sr,Eu). Differential thermal analysis and powder x-ray diffraction show that both phases are stable up to their virtually identical melting point of 520±3 °C. Refinements of single-crystal x-ray diffraction data indicate that the Ba(2) guest ion in the tetrakaidecahedron occupies the off-center 24k sites which are 0.43–0.44 Å away from the centered 6d site. The temperature-linear coefficient of the specific heat is 29 mJ/mol K^2 for both n- and p-type carriers in the β phase, four times larger than that for the α phase, suggesting contributions from tunneling of the Ba(2) guest ions between off-center minima. Analysis of specific heat with a soft-potential model (SPM) gives a characteristic energy of 20 K for the Ba(2) vibration, significantly lower than 50 K for the α phase and in fact the lowest among type-1 clathrates. The lattice thermal conductivities κL for the β phase with both charge carrier types are very similar and show a glasslike temperature dependence. This behavior in κL(T) is also described using SPM analysis, where it is found that the coupling strength between guest modes and acoustic phonons for the β phase is significantly larger than that for Sr_8Ga_\u003c16\u003eGe_\u003c30\u003e.", "subitem_description_type": "Other"}, {"subitem_description": "論文", "subitem_description_type": "Other"}]}, "item_1617186643794": {"attribute_name": "Publisher", "attribute_value_mlt": [{"subitem_1522300295150": "en", "subitem_1522300316516": "American Physical Society"}]}, "item_1617186702042": {"attribute_name": "Language", "attribute_value_mlt": [{"subitem_1551255818386": "eng"}]}, "item_1617186783814": {"attribute_name": "Identifier", "attribute_value_mlt": [{"subitem_identifier_type": "HDL", "subitem_identifier_uri": "http://hdl.handle.net/20.500.12000/47496"}]}, "item_1617186920753": {"attribute_name": "Source Identifier", "attribute_value_mlt": [{"subitem_1522646500366": "ISSN", "subitem_1522646572813": "2469-9950"}, {"subitem_1522646500366": "ISSN", "subitem_1522646572813": "2469-9969"}]}, "item_1617186941041": {"attribute_name": "Source Title", "attribute_value_mlt": [{"subitem_1522650068558": "en", "subitem_1522650091861": "Physical Review B"}]}, "item_1617187056579": {"attribute_name": "Bibliographic Information", "attribute_value_mlt": [{"bibliographicIssueDates": {"bibliographicIssueDate": "2008-06-25", "bibliographicIssueDateType": "Issued"}, "bibliographicIssueNumber": "23", "bibliographicVolumeNumber": "77"}]}, "item_1617258105262": {"attribute_name": "Resource Type", "attribute_value_mlt": [{"resourcetype": "journal article", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_1617265215918": {"attribute_name": "Version Type", "attribute_value_mlt": [{"subitem_1522305645492": "VoR", "subitem_1600292170262": "http://purl.org/coar/version/c_970fb48d4fbd8a85"}]}, "item_1617353299429": {"attribute_name": "Relation", "attribute_value_mlt": [{"subitem_1522306287251": {"subitem_1522306382014": "DOI", "subitem_1522306436033": "https://doi.org/10.1103/PhysRevB.77.235119"}}, {"subitem_1522306287251": {"subitem_1522306382014": "DOI", "subitem_1522306436033": "https://doi.org/10.1103/PhysRevB.77.235119"}}]}, "item_1617605131499": {"attribute_name": "File", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_access", "download_preview_message": "", "file_order": 0, "filename": "PhysRevB.77.235119.pdf", "future_date_message": "", "is_thumbnail": false, "mimetype": "", "size": 0, "url": {"objectType": "fulltext", "url": "https://u-ryukyu.repo.nii.ac.jp/record/2011296/files/PhysRevB.77.235119.pdf"}, "version_id": "d4dfacaf-c985-4308-8cf3-8e567180fa28"}]}, "item_title": "Simultaneous structure and carrier tuning of dimorphic clathrate Ba_8Ga_\u003c16\u003eSn_\u003c30\u003e", "item_type_id": "15", "owner": "1", "path": ["1642838338003", "1642838406414"], "permalink_uri": "http://hdl.handle.net/20.500.12000/47496", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2020-12-15"}, "publish_date": "2020-12-15", "publish_status": "0", "recid": "2011296", "relation": {}, "relation_version_is_last": true, "title": ["Simultaneous structure and carrier tuning of dimorphic clathrate Ba_8Ga_\u003c16\u003eSn_\u003c30\u003e"], "weko_shared_id": -1}
Simultaneous structure and carrier tuning of dimorphic clathrate Ba_8Ga_<16>Sn_<30>
http://hdl.handle.net/20.500.12000/47496
http://hdl.handle.net/20.500.12000/47496