{"_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": "\u00a92008 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 (\u03b2 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 (\u03b1 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\u00b13\u2009\u00b0C. 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\u20130.44\u2002\u00c5 away from the centered 6d site. The temperature-linear coefficient of the specific heat is 29\u2002mJ/mol\u2009K^2 for both n- and p-type carriers in the \u03b2 phase, four times larger than that for the \u03b1 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 \u03b1 phase and in fact the lowest among type-1 clathrates. The lattice thermal conductivities \u03baL for the \u03b2 phase with both charge carrier types are very similar and show a glasslike temperature dependence. This behavior in \u03baL(T) is also described using SPM analysis, where it is found that the coupling strength between guest modes and acoustic phonons for the \u03b2 phase is significantly larger than that for Sr_8Ga_\u003c16\u003eGe_\u003c30\u003e.", "subitem_description_type": "Other"}, {"subitem_description": "\u8ad6\u6587", "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": [{"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}