SINGLE-CRYSTAL CONDUCTIVITY STUDY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENE
Single crystals of the n-type semiconducting tin dichalcogenides SnS2-xSex (x = 0, 0.3, 0.5, 1.3, 1.85 and 2), which have a two-dimensional layered structure, have previously been intercalated with cobaltocene (CoCp2, Cp = η5-C5H5) to give the series of compounds SnS2-xSex(CoCp2)0.33. Four-contact r...
| Main Authors: | , , , , |
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| Format: | Journal article |
| Language: | English |
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1991
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| _version_ | 1826293230263599104 |
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| author | Formstone, C Kurmoo, M Fitzgerald, E Cox, P Ohare, D |
| author_facet | Formstone, C Kurmoo, M Fitzgerald, E Cox, P Ohare, D |
| author_sort | Formstone, C |
| collection | OXFORD |
| description | Single crystals of the n-type semiconducting tin dichalcogenides SnS2-xSex (x = 0, 0.3, 0.5, 1.3, 1.85 and 2), which have a two-dimensional layered structure, have previously been intercalated with cobaltocene (CoCp2, Cp = η5-C5H5) to give the series of compounds SnS2-xSex(CoCp2)0.33. Four-contact resistivity measurements have been carried out on these host and intercalate samples. The sulphur-rich intercalates (x = 0.0, 0.3, 0.7 and 1.3) were found to be semiconducting, whereas the selenium-rich intercalates (x = 1.85 and 2.0) were found to be metallic. These findings confirm earlier observations made in a photoelectron spectroscopy study. The resistivity of the semiconducting intercalates closely follows the functional form exp[(T0/T)1/4], characteristic of variable-range hopping. The values of T0 were in the range 3.4-3.7 × 108 K. The metallic intercalates show a transition to a superconducting state at 6.1 K for x = 2.0 and 5.7 K for x = 1.8. In the diselenide case this has been confirmed by observation of a magnetic response appropriate to a type II superconductor below 6 K. This is the highest reported Tc for a two-dimensional layered structure intercalated by an organometallic guest molecule. |
| first_indexed | 2024-03-07T03:26:54Z |
| format | Journal article |
| id | oxford-uuid:b95951b0-0f4e-4651-8b2d-e8d532c5cbcb |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:26:54Z |
| publishDate | 1991 |
| record_format | dspace |
| spelling | oxford-uuid:b95951b0-0f4e-4651-8b2d-e8d532c5cbcb2022-03-27T05:02:24ZSINGLE-CRYSTAL CONDUCTIVITY STUDY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENEJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b95951b0-0f4e-4651-8b2d-e8d532c5cbcbEnglishSymplectic Elements at Oxford1991Formstone, CKurmoo, MFitzgerald, ECox, POhare, DSingle crystals of the n-type semiconducting tin dichalcogenides SnS2-xSex (x = 0, 0.3, 0.5, 1.3, 1.85 and 2), which have a two-dimensional layered structure, have previously been intercalated with cobaltocene (CoCp2, Cp = η5-C5H5) to give the series of compounds SnS2-xSex(CoCp2)0.33. Four-contact resistivity measurements have been carried out on these host and intercalate samples. The sulphur-rich intercalates (x = 0.0, 0.3, 0.7 and 1.3) were found to be semiconducting, whereas the selenium-rich intercalates (x = 1.85 and 2.0) were found to be metallic. These findings confirm earlier observations made in a photoelectron spectroscopy study. The resistivity of the semiconducting intercalates closely follows the functional form exp[(T0/T)1/4], characteristic of variable-range hopping. The values of T0 were in the range 3.4-3.7 × 108 K. The metallic intercalates show a transition to a superconducting state at 6.1 K for x = 2.0 and 5.7 K for x = 1.8. In the diselenide case this has been confirmed by observation of a magnetic response appropriate to a type II superconductor below 6 K. This is the highest reported Tc for a two-dimensional layered structure intercalated by an organometallic guest molecule. |
| spellingShingle | Formstone, C Kurmoo, M Fitzgerald, E Cox, P Ohare, D SINGLE-CRYSTAL CONDUCTIVITY STUDY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENE |
| title | SINGLE-CRYSTAL CONDUCTIVITY STUDY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENE |
| title_full | SINGLE-CRYSTAL CONDUCTIVITY STUDY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENE |
| title_fullStr | SINGLE-CRYSTAL CONDUCTIVITY STUDY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENE |
| title_full_unstemmed | SINGLE-CRYSTAL CONDUCTIVITY STUDY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENE |
| title_short | SINGLE-CRYSTAL CONDUCTIVITY STUDY OF THE TIN DICHALCOGENIDES SNS2-XSEX INTERCALATED WITH COBALTOCENE |
| title_sort | single crystal conductivity study of the tin dichalcogenides sns2 xsex intercalated with cobaltocene |
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