We have used photoemission spectroscopy to examine the symmetry of the occupied states of the valence band for the La doped superconductor Bi2(Ca, Sr, La)3Cu2O8. While the oxygen states near the bottom of the 7 eV wide valence band exhibit predominantly O 2pz symmetry, the states at the top of the valence band extending to the Fermi level are found to have primarily O 2px and O 2py character. We have also examined anomalous intensity enhancements in the valence band feature for photon energies near 18 eV. These enhancements, which occur at photon energies ranging from 15.8 to 18.0 eV for the different valence band features, are not consistent with either simple final state effects or direct O2s transitions to unoccupied O2p states.
{"title":"Valence-band states in Bi2(Ca,Sr,La)3Cu2O8.","authors":"Wells, Lindberg, Shen, Dessau, Spicer, Lindau, Mitzi, Kapitulnik","doi":"10.1063/1.39050","DOIUrl":"https://doi.org/10.1063/1.39050","url":null,"abstract":"We have used photoemission spectroscopy to examine the symmetry of the occupied states of the valence band for the La doped superconductor Bi2(Ca, Sr, La)3Cu2O8. While the oxygen states near the bottom of the 7 eV wide valence band exhibit predominantly O 2pz symmetry, the states at the top of the valence band extending to the Fermi level are found to have primarily O 2px and O 2py character. We have also examined anomalous intensity enhancements in the valence band feature for photon energies near 18 eV. These enhancements, which occur at photon energies ranging from 15.8 to 18.0 eV for the different valence band features, are not consistent with either simple final state effects or direct O2s transitions to unoccupied O2p states.","PeriodicalId":20163,"journal":{"name":"Physical review. B, Condensed matter","volume":"70 1","pages":"5259-5262"},"PeriodicalIF":0.0,"publicationDate":"2008-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86179235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A simple pairing mechanism is proposed for C60 superconductors based on the near degeneracy of the low‐lying vector and axial vector levels in an isolated C60−. The implications on the superconductivity are discussed.
{"title":"Parity doublets and the pairing mechanism in C60.","authors":"Friedberg, Lee, Ren","doi":"10.1063/1.43577","DOIUrl":"https://doi.org/10.1063/1.43577","url":null,"abstract":"A simple pairing mechanism is proposed for C60 superconductors based on the near degeneracy of the low‐lying vector and axial vector levels in an isolated C60−. The implications on the superconductivity are discussed.","PeriodicalId":20163,"journal":{"name":"Physical review. B, Condensed matter","volume":"25 1","pages":"14150-14173"},"PeriodicalIF":0.0,"publicationDate":"2008-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81429164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of the structural anisotropy and lateral strain on the surface phonons of monolayer xenon on Cu(110).","authors":"Zeppenfeld, Büchel, David, Comsa, Ramseyer, Girardet","doi":"10.1103/PHYSREVB.64.037402","DOIUrl":"https://doi.org/10.1103/PHYSREVB.64.037402","url":null,"abstract":"","PeriodicalId":20163,"journal":{"name":"Physical review. B, Condensed matter","volume":"19 1","pages":"14667-14670"},"PeriodicalIF":0.0,"publicationDate":"2001-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82776448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-07-01DOI: 10.1016/S0304-8853(00)00041-X
Jiang, Li, Zhong, Yang
{"title":"Effect of a crystal field on phase transitions in a spin-1 transverse Ising model.","authors":"Jiang, Li, Zhong, Yang","doi":"10.1016/S0304-8853(00)00041-X","DOIUrl":"https://doi.org/10.1016/S0304-8853(00)00041-X","url":null,"abstract":"","PeriodicalId":20163,"journal":{"name":"Physical review. B, Condensed matter","volume":"2013 1","pages":"827-830"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73440387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-12-15DOI: 10.1103/PHYSREVB.56.16033
Lenef, Rand
We present insights into the electronic structure and relaxation of N-$V$ color centers in diamond which support the contention that Jahn-Teller effects may play a very significant role in the excited $E$ state. We also consider several opposing arguments, but show that the unusual relaxation behavior of the N-$V$ center can mask common signatures of the Jahn-Teller effect, and that it remains a strong candidate for the dominant interaction determining excited-state splittings.
{"title":"Electronic structure of the N-V center in diamond: Theory.","authors":"Lenef, Rand","doi":"10.1103/PHYSREVB.56.16033","DOIUrl":"https://doi.org/10.1103/PHYSREVB.56.16033","url":null,"abstract":"We present insights into the electronic structure and relaxation of N-$V$ color centers in diamond which support the contention that Jahn-Teller effects may play a very significant role in the excited $E$ state. We also consider several opposing arguments, but show that the unusual relaxation behavior of the N-$V$ center can mask common signatures of the Jahn-Teller effect, and that it remains a strong candidate for the dominant interaction determining excited-state splittings.","PeriodicalId":20163,"journal":{"name":"Physical review. B, Condensed matter","volume":"1 1","pages":"13441-13455"},"PeriodicalIF":0.0,"publicationDate":"1997-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79346933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1997-04-10DOI: 10.1016/S0039-6028(97)01310-1
Wassermeier, Behrend, Däweritz, Ploog
{"title":"Reconstruction of the GaAs(001) surface induced by submonolayer Si deposition.","authors":"Wassermeier, Behrend, Däweritz, Ploog","doi":"10.1016/S0039-6028(97)01310-1","DOIUrl":"https://doi.org/10.1016/S0039-6028(97)01310-1","url":null,"abstract":"","PeriodicalId":20163,"journal":{"name":"Physical review. B, Condensed matter","volume":"3 1","pages":"R2269-R2272"},"PeriodicalIF":0.0,"publicationDate":"1997-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74932687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Electronic structure of GaN measured using soft-x-ray emission and absorption.","authors":"Stagarescu, Duda, Smith, Guo, Nordgren, Singh, Moustakas","doi":"10.1103/physrevb.54.r17335","DOIUrl":"https://doi.org/10.1103/physrevb.54.r17335","url":null,"abstract":"","PeriodicalId":20163,"journal":{"name":"Physical review. B, Condensed matter","volume":"54 24","pages":"R17335-R17338"},"PeriodicalIF":0.0,"publicationDate":"1996-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1103/physrevb.54.r17335","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40740370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-12-15DOI: 10.1103/physrevb.54.r17347
Lu, Souda, O'Connor, King
{"title":"Interaction of oxygen with a Cs-monolayer-covered Si(100) surface.","authors":"Lu, Souda, O'Connor, King","doi":"10.1103/physrevb.54.r17347","DOIUrl":"https://doi.org/10.1103/physrevb.54.r17347","url":null,"abstract":"","PeriodicalId":20163,"journal":{"name":"Physical review. B, Condensed matter","volume":"54 24","pages":"R17347-R17350"},"PeriodicalIF":0.0,"publicationDate":"1996-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1103/physrevb.54.r17347","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40740373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-12-15DOI: 10.1103/physrevb.54.r17367
Crampin, Bryant
{"title":"Fully three-dimensional scattering calculations of standing electron waves in quantum nanostructures: The importance of quasiparticle interactions.","authors":"Crampin, Bryant","doi":"10.1103/physrevb.54.r17367","DOIUrl":"https://doi.org/10.1103/physrevb.54.r17367","url":null,"abstract":"","PeriodicalId":20163,"journal":{"name":"Physical review. B, Condensed matter","volume":"54 24","pages":"R17367-R17370"},"PeriodicalIF":0.0,"publicationDate":"1996-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1103/physrevb.54.r17367","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40740378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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