WEKO3
アイテム
{"_buckets": {"deposit": "dd6fe0e8-dc0b-4338-9400-36e6814bb465"}, "_deposit": {"created_by": 1, "id": "81022", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "81022"}, "status": "published"}, "_oai": {"id": "oai:repo.qst.go.jp:00081022", "sets": ["28"]}, "author_link": ["902192", "902194", "902195", "902196", "902197", "902193"], "item_10005_date_7": {"attribute_name": "発表年月日", "attribute_value_mlt": [{"subitem_date_issued_datetime": "2020-11-04", "subitem_date_issued_type": "Issued"}]}, "item_10005_description_5": {"attribute_name": "抄録", "attribute_value_mlt": [{"subitem_description": "Positronium (Ps) is a quasi-stable bound system consisting of an electron and a positron. From the annihilation ratio of Ps decay, the spin polarization of electrons containing in Ps can be determined. Since Ps is formed only at a topmost surface region with a low-electron density, the spin polarization obtained by this method is not affected by the bulk condition. If the energy-resolved and spin-polarized Ps annihilation spectroscopy is available, one can obtain the spin-polarized electron density-of-states (DOS) associated with only the top-surface layer of materials. We have been developing SP-PsTOF apparatus for the energy-resolved and spin-polarized Ps annihilation spectroscopy. From the SP-PsTOF spectrum obtained for a Ni film, the negative polarization near the Fermi level was obtained. This result is reproduced by a theoretical calculation. The SP-PsTOF method is expected to be most powerful tool for the study of materials for spintronics application.\n", "subitem_description_type": "Abstract"}]}, "item_10005_description_6": {"attribute_name": "会議概要(会議名, 開催地, 会期, 主催者等)", "attribute_value_mlt": [{"subitem_description": "4th QST International Symposium -Innovation from Quantum Materials Science-", "subitem_description_type": "Other"}]}, "item_access_right": {"attribute_name": "アクセス権", "attribute_value_mlt": [{"subitem_access_right": "metadata only access", "subitem_access_right_uri": "http://purl.org/coar/access_right/c_14cb"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Maekawa, Masaki"}], "nameIdentifiers": [{"nameIdentifier": "902192", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Miyashita, Atsumi"}], "nameIdentifiers": [{"nameIdentifier": "902193", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Kawasuso, Atsuo"}], "nameIdentifiers": [{"nameIdentifier": "902194", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Maekawa, Masaki", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "902195", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Miyashita, Atsumi", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "902196", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Kawasuso, Atsuo", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "902197", "nameIdentifierScheme": "WEKO"}]}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "conference object", "resourceuri": "http://purl.org/coar/resource_type/c_c94f"}]}, "item_title": "Development of spin-polarized positronium time-of-flight spectroscopy", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Development of spin-polarized positronium time-of-flight spectroscopy"}]}, "item_type_id": "10005", "owner": "1", "path": ["28"], "permalink_uri": "https://repo.qst.go.jp/records/81022", "pubdate": {"attribute_name": "公開日", "attribute_value": "2020-10-30"}, "publish_date": "2020-10-30", "publish_status": "0", "recid": "81022", "relation": {}, "relation_version_is_last": true, "title": ["Development of spin-polarized positronium time-of-flight spectroscopy"], "weko_shared_id": -1}
Development of spin-polarized positronium time-of-flight spectroscopy
https://repo.qst.go.jp/records/81022
https://repo.qst.go.jp/records/81022df938bdc-b7a2-4b08-a55b-78d0f4f82185
Item type | 会議発表用資料 / Presentation(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2020-10-30 | |||||
タイトル | ||||||
タイトル | Development of spin-polarized positronium time-of-flight spectroscopy | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
資源タイプ | conference object | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Maekawa, Masaki
× Maekawa, Masaki× Miyashita, Atsumi× Kawasuso, Atsuo× Maekawa, Masaki× Miyashita, Atsumi× Kawasuso, Atsuo |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Positronium (Ps) is a quasi-stable bound system consisting of an electron and a positron. From the annihilation ratio of Ps decay, the spin polarization of electrons containing in Ps can be determined. Since Ps is formed only at a topmost surface region with a low-electron density, the spin polarization obtained by this method is not affected by the bulk condition. If the energy-resolved and spin-polarized Ps annihilation spectroscopy is available, one can obtain the spin-polarized electron density-of-states (DOS) associated with only the top-surface layer of materials. We have been developing SP-PsTOF apparatus for the energy-resolved and spin-polarized Ps annihilation spectroscopy. From the SP-PsTOF spectrum obtained for a Ni film, the negative polarization near the Fermi level was obtained. This result is reproduced by a theoretical calculation. The SP-PsTOF method is expected to be most powerful tool for the study of materials for spintronics application. | |||||
会議概要(会議名, 開催地, 会期, 主催者等) | ||||||
内容記述タイプ | Other | |||||
内容記述 | 4th QST International Symposium -Innovation from Quantum Materials Science- | |||||
発表年月日 | ||||||
日付 | 2020-11-04 | |||||
日付タイプ | Issued |