ARPES studies of the electronic structure of LaOFe (P,As)

Journal Article · Thu Jan 01 04:00:00 EST 2009 · Physica C

DOI:https://doi.org/10.1016/j.physc.2009.03.044· OSTI ID:1049861

Lu, D. H. ^[1]; Yi, M. ^[2]; Mo, S. -K. ^[3]; Analytis, J. G. ^[2]; Chu, J. -H. ^[2]; Erickson, A. S. ^[2]; Singh, David J ^[4]; Hussain, Z ^[3]; Geballe, T. H. ^[2]; Fisher, I. R. ^[2]; Shen, Z. -X. ^[2]

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1. Stanford Synchrotron Radiation Lightsource
2. Stanford Institute for Materials and Energy Sciences
3. Lawrence Berkeley National Laboratory (LBNL)
4. ORNL

We report a comparison study of LaOFeP and LaOFeAs, two parent compounds of recently discovered iron-pnictide superconductors, using angle-resolved photoemission spectroscopy. Both systems exhibit some common features that are very different from well-studied cuprates. In addition, important differences have also been observed between these two ferrooxypnictides. For LaOFeP, quantitative agreement can be found between our photoemission data and the LDA band structure calculations, suggesting that a weak coupling approach based on an itinerant ground state may be more appropriate for understanding this new superconducting compound. In contrast, the agreement between LDA calculations and experiments in LaOFeAs is relatively poor, as highlighted by the unexpected Fermi surface topology around ({pi}, {pi}). Further investigations are required for a comprehensive understanding of the electronic structure of LaOFeAs and related compounds.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1049861
• Journal Information: Physica C, Journal Name: Physica C Journal Issue: 9-12 Vol. 469; ISSN 0921-4534; ISSN PHYCE6
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CUPRATES
ELECTRONIC STRUCTURE
FERMI LEVEL
GROUND STATES
PHOTOEMISSION
SPECTROSCOPY
SUPERCONDUCTORS
TOPOLOGY