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- Publisher Website: 10.1103/PhysRevLett.124.087601
- Scopus: eid_2-s2.0-85081790536
- PMID: 32167317
- WOS: WOS:000517293400015
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Article: Experimental Identification of Electric Dipoles Induced by Magnetic Monopoles in Tb2Ti2O7
Title | Experimental Identification of Electric Dipoles Induced by Magnetic Monopoles in Tb2Ti2O7 |
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Authors | |
Issue Date | 2020 |
Publisher | American Physical Society. The Journal's web site is located at https://journals.aps.org/prl/ |
Citation | Physical Review Letters, 2020, v. 124 n. 8, article no. 087601 How to Cite? |
Abstract | The fundamental principles of electrodynamics allow an electron carrying both electric monopole (charge) and magnetic dipole (spin) but prohibit its magnetic counterpart. Recently, it was predicted that the magnetic 'monopoles' carrying emergent magnetic charges in spin ice systems can induce electric dipoles. The inspiring prediction offers a novel way to study magnetic monopole excitations and magnetoelectric coupling. However, no clear example has been identified up to now. Here, we report the experimental evidence for electric dipoles induced by magnetic monopoles in spin frustrated Tb2Ti2O7. The magnetic field applied to pyrochlore Tb2Ti2O7 along the [111] direction, brings out a '3-in-1-out' magnetic monopole configuration, and then induces a subtle structural phase transition at Hc∼2.3 T. The transition is made evident by the nonlinear phonon splitting under magnetic fields and the anomalous crystal-field excitations of Tb3+ ions. The observations consistently point to the displacement of the oxygen O′′ anions along the [111] axis which gives rise to the formation of electric dipoles. The finding demonstrates that the scenario of magnetic monopole having both magnetic charge and electric dipole is realized in Tb2Ti2O7 and sheds light into the coupling between electricity and magnetism of magnetic monopoles in spin frustrated systems. |
Persistent Identifier | http://hdl.handle.net/10722/286299 |
ISSN | 2023 Impact Factor: 8.1 2023 SCImago Journal Rankings: 3.040 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Jin, F | - |
dc.contributor.author | Liu, C | - |
dc.contributor.author | Chang, Y | - |
dc.contributor.author | Zhang, A | - |
dc.contributor.author | Wang, Y | - |
dc.contributor.author | Liu, W | - |
dc.contributor.author | Wang, X | - |
dc.contributor.author | Sun, Y | - |
dc.contributor.author | Chen, G | - |
dc.contributor.author | Sun, X | - |
dc.contributor.author | Zhang, Q | - |
dc.date.accessioned | 2020-08-31T07:01:57Z | - |
dc.date.available | 2020-08-31T07:01:57Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Physical Review Letters, 2020, v. 124 n. 8, article no. 087601 | - |
dc.identifier.issn | 0031-9007 | - |
dc.identifier.uri | http://hdl.handle.net/10722/286299 | - |
dc.description.abstract | The fundamental principles of electrodynamics allow an electron carrying both electric monopole (charge) and magnetic dipole (spin) but prohibit its magnetic counterpart. Recently, it was predicted that the magnetic 'monopoles' carrying emergent magnetic charges in spin ice systems can induce electric dipoles. The inspiring prediction offers a novel way to study magnetic monopole excitations and magnetoelectric coupling. However, no clear example has been identified up to now. Here, we report the experimental evidence for electric dipoles induced by magnetic monopoles in spin frustrated Tb2Ti2O7. The magnetic field applied to pyrochlore Tb2Ti2O7 along the [111] direction, brings out a '3-in-1-out' magnetic monopole configuration, and then induces a subtle structural phase transition at Hc∼2.3 T. The transition is made evident by the nonlinear phonon splitting under magnetic fields and the anomalous crystal-field excitations of Tb3+ ions. The observations consistently point to the displacement of the oxygen O′′ anions along the [111] axis which gives rise to the formation of electric dipoles. The finding demonstrates that the scenario of magnetic monopole having both magnetic charge and electric dipole is realized in Tb2Ti2O7 and sheds light into the coupling between electricity and magnetism of magnetic monopoles in spin frustrated systems. | - |
dc.language | eng | - |
dc.publisher | American Physical Society. The Journal's web site is located at https://journals.aps.org/prl/ | - |
dc.relation.ispartof | Physical Review Letters | - |
dc.rights | Copyright 2020 by The American Physical Society. This article is available online at https://doi.org/10.1103/PhysRevLett.124.087601. | - |
dc.title | Experimental Identification of Electric Dipoles Induced by Magnetic Monopoles in Tb2Ti2O7 | - |
dc.type | Article | - |
dc.identifier.email | Chen, G: gangchen@hku.hk | - |
dc.identifier.authority | Chen, G=rp02491 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1103/PhysRevLett.124.087601 | - |
dc.identifier.pmid | 32167317 | - |
dc.identifier.scopus | eid_2-s2.0-85081790536 | - |
dc.identifier.hkuros | 313346 | - |
dc.identifier.volume | 124 | - |
dc.identifier.issue | 8 | - |
dc.identifier.spage | article no. 087601 | - |
dc.identifier.epage | article no. 087601 | - |
dc.identifier.isi | WOS:000517293400015 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 0031-9007 | - |