{"title":"团簇反铁磁K0.8Fe1.6Se2的磁相变和自旋激发","authors":"Huan Li, Yu Liu","doi":"10.1209/0295-5075/98/47006","DOIUrl":null,"url":null,"abstract":"We have studied the magnetic phase diagram and magnetic properties of iron selenide K0.8Fe1.6Se2 using an effective spin-exchange model. By applying the bond-operator approach, we show that the Fe moments form a checkerboard antiferromagnetic structure in a wide range of parameter regions, and the phase boundary between the magnetic phase and the spin-disordered phase is calculated as a function of the exchange interactions. We also calculate the spin excitation spectrums as well as the predicted inelastic neutron scattering patterns of the checkerboard antiferromagnetic state within the spin-wave method.","PeriodicalId":171520,"journal":{"name":"EPL (Europhysics Letters)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Magnetic phase transition and the spin excitations in cluster antiferromagnetic K0.8Fe1.6Se2\",\"authors\":\"Huan Li, Yu Liu\",\"doi\":\"10.1209/0295-5075/98/47006\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We have studied the magnetic phase diagram and magnetic properties of iron selenide K0.8Fe1.6Se2 using an effective spin-exchange model. By applying the bond-operator approach, we show that the Fe moments form a checkerboard antiferromagnetic structure in a wide range of parameter regions, and the phase boundary between the magnetic phase and the spin-disordered phase is calculated as a function of the exchange interactions. We also calculate the spin excitation spectrums as well as the predicted inelastic neutron scattering patterns of the checkerboard antiferromagnetic state within the spin-wave method.\",\"PeriodicalId\":171520,\"journal\":{\"name\":\"EPL (Europhysics Letters)\",\"volume\":\"1 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2012-05-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"EPL (Europhysics Letters)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1209/0295-5075/98/47006\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"EPL (Europhysics Letters)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1209/0295-5075/98/47006","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Magnetic phase transition and the spin excitations in cluster antiferromagnetic K0.8Fe1.6Se2
We have studied the magnetic phase diagram and magnetic properties of iron selenide K0.8Fe1.6Se2 using an effective spin-exchange model. By applying the bond-operator approach, we show that the Fe moments form a checkerboard antiferromagnetic structure in a wide range of parameter regions, and the phase boundary between the magnetic phase and the spin-disordered phase is calculated as a function of the exchange interactions. We also calculate the spin excitation spectrums as well as the predicted inelastic neutron scattering patterns of the checkerboard antiferromagnetic state within the spin-wave method.