Unified spin model for magnetic excitations in iron chalcogenides
| dc.citation.articleNumber | 174403 | |
| dc.citation.issueNumber | 17 | |
| dc.citation.journalTitle | Physical Review B | |
| dc.citation.volumeNumber | 96 | |
| dc.contributor.author | Ergueta, Patricia Bilbao | |
| dc.contributor.author | Hu, Wen-Jun | |
| dc.contributor.author | Nevidomskyy, Andriy H. | |
| dc.date.accessioned | 2018-01-23T18:10:48Z | |
| dc.date.available | 2018-01-23T18:10:48Z | |
| dc.date.issued | 2017 | |
| dc.description.abstract | Recent inelastic neutron scattering (INS) measurements on FeSe and Fe(Te1−xSex) have sparked intense debate over the nature of the ground state in these materials. Here we propose an effective bilinear-biquadratic spin model, which is shown to consistently describe the evolution of low-energy spin excitations in FeSe, both under applied pressure and upon Se/Te substitution. The phase diagram, studied using a combination of variational mean-field, flavor-wave calculations and density-matrix renormalization group (DMRG), exhibits a sequence of transitions between the columnar antiferromagnet common to the iron pnictides, the nonmagnetic ferroquadrupolar phase attributed to FeSe, and the double-stripe antiferromagnetic order known to exist in Fe1+yTe. The calculated spin structure factor in these phases mimics closely that observed with INS in the Fe(Te1−xSex) series. In addition to the experimentally established phases, the possibility of incommensurate magnetic order is also predicted. | |
| dc.identifier.citation | Ergueta, Patricia Bilbao, Hu, Wen-Jun and Nevidomskyy, Andriy H.. "Unified spin model for magnetic excitations in iron chalcogenides." <i>Physical Review B,</i> 96, no. 17 (2017) American Physical Society: https://doi.org/10.1103/PhysRevB.96.174403. | |
| dc.identifier.digital | Unified-spin-model | |
| dc.identifier.doi | https://doi.org/10.1103/PhysRevB.96.174403 | |
| dc.identifier.uri | https://hdl.handle.net/1911/99242 | |
| dc.language.iso | eng | |
| dc.publisher | American Physical Society | |
| dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | |
| dc.title | Unified spin model for magnetic excitations in iron chalcogenides | |
| dc.type | Journal article | |
| dc.type.dcmi | Text | |
| dc.type.publication | publisher version |
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