Quadrupole Excitation in Tunnel Splitting Oscillation in Nanoparticle 𝐌𝐧12
We analyze the interference between tunneling paths that occur for a spin system with special Hamiltonian both for dipole and quadrupole excitations. Using an instanton approach, we find that as the strength of the second-order transverse anisotropy is increased, the tunnel splitting for both excita...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2012/530765 |
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| _version_ | 1832552049872470016 |
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| author | Yousef Yousefi Khikmat Kh. Muminov |
| author_facet | Yousef Yousefi Khikmat Kh. Muminov |
| author_sort | Yousef Yousefi |
| collection | DOAJ |
| description | We analyze the interference between tunneling paths that occur
for a spin system with special Hamiltonian both for dipole and quadrupole
excitations. Using an instanton approach, we find that as the strength
of the second-order transverse anisotropy is increased, the tunnel splitting for both excitations is modulated, with zeros occurring periodically and the number of quenching points for quadrupole excitation
decreasing. This effect results from the interference of four tunneling
paths connecting easy-axis spin orientations and occurs in the absence
of any magnetic field. |
| format | Article |
| id | doaj-art-d0e964b7072f41709bc503bbbca20c1e |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-d0e964b7072f41709bc503bbbca20c1e2025-02-03T05:59:49ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242012-01-01201210.1155/2012/530765530765Quadrupole Excitation in Tunnel Splitting Oscillation in Nanoparticle 𝐌𝐧12Yousef Yousefi0Khikmat Kh. Muminov1Physical-Technical Institute Named after S.U.Umarov, Academy of Sciences of Republic of Tajikistan, Aini Ave 299/1, Dushanbe, TajikistanPhysical-Technical Institute Named after S.U.Umarov, Academy of Sciences of Republic of Tajikistan, Aini Ave 299/1, Dushanbe, TajikistanWe analyze the interference between tunneling paths that occur for a spin system with special Hamiltonian both for dipole and quadrupole excitations. Using an instanton approach, we find that as the strength of the second-order transverse anisotropy is increased, the tunnel splitting for both excitations is modulated, with zeros occurring periodically and the number of quenching points for quadrupole excitation decreasing. This effect results from the interference of four tunneling paths connecting easy-axis spin orientations and occurs in the absence of any magnetic field.http://dx.doi.org/10.1155/2012/530765 |
| spellingShingle | Yousef Yousefi Khikmat Kh. Muminov Quadrupole Excitation in Tunnel Splitting Oscillation in Nanoparticle 𝐌𝐧12 Advances in Condensed Matter Physics |
| title | Quadrupole Excitation in Tunnel Splitting Oscillation in Nanoparticle 𝐌𝐧12 |
| title_full | Quadrupole Excitation in Tunnel Splitting Oscillation in Nanoparticle 𝐌𝐧12 |
| title_fullStr | Quadrupole Excitation in Tunnel Splitting Oscillation in Nanoparticle 𝐌𝐧12 |
| title_full_unstemmed | Quadrupole Excitation in Tunnel Splitting Oscillation in Nanoparticle 𝐌𝐧12 |
| title_short | Quadrupole Excitation in Tunnel Splitting Oscillation in Nanoparticle 𝐌𝐧12 |
| title_sort | quadrupole excitation in tunnel splitting oscillation in nanoparticle 𝐌𝐧12 |
| url | http://dx.doi.org/10.1155/2012/530765 |
| work_keys_str_mv | AT yousefyousefi quadrupoleexcitationintunnelsplittingoscillationinnanoparticlemn12 AT khikmatkhmuminov quadrupoleexcitationintunnelsplittingoscillationinnanoparticlemn12 |