Quantum oscillations in the parent magnetic phase of an iron arsenide high temperature superconductor.

Journal Article · Tue Jan 01 00:00:00 EST 2008 · Journal of Physics: Condensed Matter

DOI:https://doi.org/10.1088/0953-8984/20/42/422203· OSTI ID:940351

Sebastian, Suchitra ^[1]; Gillett, J ^[1]; Harrison, N ^[2]; Lau, P H C ^[1]; Singh, David J ^[3]; Mielke, C H ^[2]; Lonzarich, G G ^[1]

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1. Cambridge University
2. Los Alamos National Laboratory (LANL)
3. ORNL

We report measurements of quantum oscillations in SrFe{sub 2}As{sub 2}--which is an antiferromagnetic parent of the iron arsenide family of superconductors--known to become superconducting under doping and the application of pressure. The magnetic field and temperature dependences of the oscillations between 20 and 55 T in the liquid helium temperature range suggest that the electronic excitations are those of a Fermi liquid. We show that the observed Fermi surface comprising small pockets is consistent with the formation of a spin-density wave. Our measurements thus demonstrate that high T{sub c} superconductivity can occur on doping or pressurizing a conventional metallic spin-density wave state.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 940351
• Journal Information: Journal of Physics: Condensed Matter, Vol. 20, Issue 42
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FERMI GAS
FERMI LEVEL
IRON ARSENIDES
OSCILLATIONS
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
STRONTIUM COMPOUNDS
ARSENIDES
HIGH-TC SUPERCONDUCTORS