Phase boundary in the dimensionality of angle-dependent magnetoresistance oscillations in the charge-transfer salt α-(BEDT-TTF)2KHg(SCN)4
Angle-dependent magnetoresistance oscillations (AMROs) have been studied in the isostructural charge-transfer salts α-(BEDT-TTF)2KHg(SCN)4 and α-(BEDT-TTF)2NH4Hg(SCN)4 (where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene) in steady fields of up to 30 T. The shapes of the approximately elliptical...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Jezik: | English |
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1996
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| _version_ | 1826272152120197120 |
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| author | House, A Blundell, S Honold, M Singleton, J Perenboom, J Hayes, W Kurmoo, M Day, P |
| author_facet | House, A Blundell, S Honold, M Singleton, J Perenboom, J Hayes, W Kurmoo, M Day, P |
| author_sort | House, A |
| collection | OXFORD |
| description | Angle-dependent magnetoresistance oscillations (AMROs) have been studied in the isostructural charge-transfer salts α-(BEDT-TTF)2KHg(SCN)4 and α-(BEDT-TTF)2NH4Hg(SCN)4 (where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene) in steady fields of up to 30 T. The shapes of the approximately elliptical quasi-two-dimensional (Q2D) Fermi surfaces that these organic metals possess have been determined at 30 T and are found to be in broad agreement with recent band-structure calculations. The Fermi surface of the salt α-(BEDT-TTF)2KHg(SCN)4 undergoes a reconstruction at low fields and temperatures, resulting in a change in the dimensionality of the AMROs from Q2D character to quasi-one-dimensional character. This change is associated with the kink transition that is observed in magnetic field sweeps and is attributed to the formation of a spin-density wave ground state. The phase boundary of the change in the AMRO dimensionality has been followed to both the low-temperature high-field (about 23 T) and low-field high-temperature (about 8 K) extremes. The data are compared with recently proposed models of the AMROs and Fermi surfaces for these materials. |
| first_indexed | 2024-03-06T22:08:01Z |
| format | Journal article |
| id | oxford-uuid:50d2f427-6b5c-49d0-8c25-d69e45993c15 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:08:01Z |
| publishDate | 1996 |
| record_format | dspace |
| spelling | oxford-uuid:50d2f427-6b5c-49d0-8c25-d69e45993c152022-03-26T16:15:52ZPhase boundary in the dimensionality of angle-dependent magnetoresistance oscillations in the charge-transfer salt α-(BEDT-TTF)2KHg(SCN)4 Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:50d2f427-6b5c-49d0-8c25-d69e45993c15EnglishSymplectic Elements at Oxford1996House, ABlundell, SHonold, MSingleton, JPerenboom, JHayes, WKurmoo, MDay, PAngle-dependent magnetoresistance oscillations (AMROs) have been studied in the isostructural charge-transfer salts α-(BEDT-TTF)2KHg(SCN)4 and α-(BEDT-TTF)2NH4Hg(SCN)4 (where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene) in steady fields of up to 30 T. The shapes of the approximately elliptical quasi-two-dimensional (Q2D) Fermi surfaces that these organic metals possess have been determined at 30 T and are found to be in broad agreement with recent band-structure calculations. The Fermi surface of the salt α-(BEDT-TTF)2KHg(SCN)4 undergoes a reconstruction at low fields and temperatures, resulting in a change in the dimensionality of the AMROs from Q2D character to quasi-one-dimensional character. This change is associated with the kink transition that is observed in magnetic field sweeps and is attributed to the formation of a spin-density wave ground state. The phase boundary of the change in the AMRO dimensionality has been followed to both the low-temperature high-field (about 23 T) and low-field high-temperature (about 8 K) extremes. The data are compared with recently proposed models of the AMROs and Fermi surfaces for these materials. |
| spellingShingle | House, A Blundell, S Honold, M Singleton, J Perenboom, J Hayes, W Kurmoo, M Day, P Phase boundary in the dimensionality of angle-dependent magnetoresistance oscillations in the charge-transfer salt α-(BEDT-TTF)2KHg(SCN)4 |
| title | Phase boundary in the dimensionality of angle-dependent magnetoresistance oscillations in the charge-transfer salt α-(BEDT-TTF)2KHg(SCN)4
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| title_full | Phase boundary in the dimensionality of angle-dependent magnetoresistance oscillations in the charge-transfer salt α-(BEDT-TTF)2KHg(SCN)4
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| title_fullStr | Phase boundary in the dimensionality of angle-dependent magnetoresistance oscillations in the charge-transfer salt α-(BEDT-TTF)2KHg(SCN)4
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| title_full_unstemmed | Phase boundary in the dimensionality of angle-dependent magnetoresistance oscillations in the charge-transfer salt α-(BEDT-TTF)2KHg(SCN)4
|
| title_short | Phase boundary in the dimensionality of angle-dependent magnetoresistance oscillations in the charge-transfer salt α-(BEDT-TTF)2KHg(SCN)4
|
| title_sort | phase boundary in the dimensionality of angle dependent magnetoresistance oscillations in the charge transfer salt α bedt ttf 2khg scn 4 |
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