Brownian motion and quantum dynamics of magnetic monopoles in spin ice
Spin ice illustrates many unusual magnetic properties, including zero point entropy, emergent monopoles and a quasi liquid–gas transition. To reveal the quantum spin dynamics that underpin these phenomena is an experimental challenge. Here we show how crucial information is contained in the frequenc...
| Principais autores: | , , , , |
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| Formato: | Journal article |
| Idioma: | English |
| Publicado em: |
Springer Nature
2013
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| _version_ | 1826292098967535616 |
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| author | Bovo, L Bloxsom, J Prabhakaran, D Aeppli, G Bramwell, S |
| author_facet | Bovo, L Bloxsom, J Prabhakaran, D Aeppli, G Bramwell, S |
| author_sort | Bovo, L |
| collection | OXFORD |
| description | Spin ice illustrates many unusual magnetic properties, including zero point entropy, emergent monopoles and a quasi liquid–gas transition. To reveal the quantum spin dynamics that underpin these phenomena is an experimental challenge. Here we show how crucial information is contained in the frequency dependence of the magnetic susceptibility and in its high frequency or adiabatic limit. The typical response of Dy2Ti2O7 spin ice indicates that monopole diffusion is Brownian but is underpinned by spin tunnelling and is influenced by collective monopole interactions. The adiabatic response reveals evidence of driven monopole plasma oscillations in weak applied field, and unconventional critical behaviour in strong applied field. Our results clarify the origin of the relatively high frequency response in spin ice. They disclose unexpected physics and establish adiabatic susceptibility as a revealing characteristic of exotic spin systems. |
| first_indexed | 2024-03-07T03:09:28Z |
| format | Journal article |
| id | oxford-uuid:b3ad7d29-1926-4d7c-801d-d4414bdeecfa |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T03:09:28Z |
| publishDate | 2013 |
| publisher | Springer Nature |
| record_format | dspace |
| spelling | oxford-uuid:b3ad7d29-1926-4d7c-801d-d4414bdeecfa2022-03-27T04:21:03ZBrownian motion and quantum dynamics of magnetic monopoles in spin iceJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:b3ad7d29-1926-4d7c-801d-d4414bdeecfaEnglishSymplectic Elements at OxfordSpringer Nature2013Bovo, LBloxsom, JPrabhakaran, DAeppli, GBramwell, SSpin ice illustrates many unusual magnetic properties, including zero point entropy, emergent monopoles and a quasi liquid–gas transition. To reveal the quantum spin dynamics that underpin these phenomena is an experimental challenge. Here we show how crucial information is contained in the frequency dependence of the magnetic susceptibility and in its high frequency or adiabatic limit. The typical response of Dy2Ti2O7 spin ice indicates that monopole diffusion is Brownian but is underpinned by spin tunnelling and is influenced by collective monopole interactions. The adiabatic response reveals evidence of driven monopole plasma oscillations in weak applied field, and unconventional critical behaviour in strong applied field. Our results clarify the origin of the relatively high frequency response in spin ice. They disclose unexpected physics and establish adiabatic susceptibility as a revealing characteristic of exotic spin systems. |
| spellingShingle | Bovo, L Bloxsom, J Prabhakaran, D Aeppli, G Bramwell, S Brownian motion and quantum dynamics of magnetic monopoles in spin ice |
| title | Brownian motion and quantum dynamics of magnetic monopoles in spin ice |
| title_full | Brownian motion and quantum dynamics of magnetic monopoles in spin ice |
| title_fullStr | Brownian motion and quantum dynamics of magnetic monopoles in spin ice |
| title_full_unstemmed | Brownian motion and quantum dynamics of magnetic monopoles in spin ice |
| title_short | Brownian motion and quantum dynamics of magnetic monopoles in spin ice |
| title_sort | brownian motion and quantum dynamics of magnetic monopoles in spin ice |
| work_keys_str_mv | AT bovol brownianmotionandquantumdynamicsofmagneticmonopolesinspinice AT bloxsomj brownianmotionandquantumdynamicsofmagneticmonopolesinspinice AT prabhakarand brownianmotionandquantumdynamicsofmagneticmonopolesinspinice AT aepplig brownianmotionandquantumdynamicsofmagneticmonopolesinspinice AT bramwells brownianmotionandquantumdynamicsofmagneticmonopolesinspinice |