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Article: Impurity states in a family of antiferromagnetic iron arsenides

TitleImpurity states in a family of antiferromagnetic iron arsenides
Authors
Issue Date2009
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://www.iop.org/EJ/journal/NJP
Citation
New Journal Of Physics, 2009, v. 11 How to Cite?
AbstractIn this paper, we explore theoretically the impurity states in antiferromagnetic spin-density wave states of iron arsenide. Two types of impurity models are employed: one has only intraband scattering, while the other has both intraband and interband scatterings with equal strength. Interestingly, the impurity bound state is revealed around the impurity site in the energy gap for both models. However, the impurity state is doubly degenerate with respect to spin for the first case, whereas the single-impurity state is observed in either the spin-up or spin-down channel for the second case. The impurity-induced variations of the local density of states are also examined. We propose scanning tunnelling microscopy (STM) measurements of the impurity state with the bound energy and spatial distribution of the wavefunction, which may shed light on the mechanism of the magnetically ordered phase. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.
Persistent Identifierhttp://hdl.handle.net/10722/59646
ISSN
2015 Impact Factor: 3.57
2015 SCImago Journal Rankings: 1.902
ISI Accession Number ID
Funding AgencyGrant Number
NSFC10674179
10429401
GRF grant of Hong Kong
Funding Information:

This work was supported by the NSFC grant numbers 10674179 and 10429401 and by a GRF grant of Hong Kong.

References

 

DC FieldValueLanguage
dc.contributor.authorHan, Qen_HK
dc.contributor.authorWang, ZDen_HK
dc.date.accessioned2010-05-31T03:54:25Z-
dc.date.available2010-05-31T03:54:25Z-
dc.date.issued2009en_HK
dc.identifier.citationNew Journal Of Physics, 2009, v. 11en_HK
dc.identifier.issn1367-2630en_HK
dc.identifier.urihttp://hdl.handle.net/10722/59646-
dc.description.abstractIn this paper, we explore theoretically the impurity states in antiferromagnetic spin-density wave states of iron arsenide. Two types of impurity models are employed: one has only intraband scattering, while the other has both intraband and interband scatterings with equal strength. Interestingly, the impurity bound state is revealed around the impurity site in the energy gap for both models. However, the impurity state is doubly degenerate with respect to spin for the first case, whereas the single-impurity state is observed in either the spin-up or spin-down channel for the second case. The impurity-induced variations of the local density of states are also examined. We propose scanning tunnelling microscopy (STM) measurements of the impurity state with the bound energy and spatial distribution of the wavefunction, which may shed light on the mechanism of the magnetically ordered phase. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.en_HK
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://www.iop.org/EJ/journal/NJPen_HK
dc.relation.ispartofNew Journal of Physicsen_HK
dc.titleImpurity states in a family of antiferromagnetic iron arsenidesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1367-2630&volume=11&spage=025022: 1&epage=9&date=2009&atitle=Impurity+states+in+a+family+of+antiferromagnetic+iron+arsenidesen_HK
dc.identifier.emailWang, ZD: zwang@hkucc.hku.hken_HK
dc.identifier.authorityWang, ZD=rp00802en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/1367-2630/11/2/025022en_HK
dc.identifier.scopuseid_2-s2.0-63849122499en_HK
dc.identifier.hkuros155369en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-63849122499&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume11en_HK
dc.identifier.isiWOS:000263744200021-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridHan, Q=7202485348en_HK
dc.identifier.scopusauthoridWang, ZD=14828459100en_HK
dc.identifier.citeulike4113213-

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