Fermi Surface and Mass Enhancement in KFe2As2 from de Haas–van Alphen Effect Measurements

2010/01/31 by Taichi Terashima, Motoi Kimata, Nobuyuki Kurita +15 · 2 citations
Materials Science · Physics and Astronomy · #De Haas–van Alphen effect #Effective mass (spring–mass system) #Electron #Electronic band structure #Fermi Gamma-ray Space Telescope #Fermi level #Fermi surface #Iron-based superconductors research #Organic and Molecular Conductors Research #Range (aeronautics) #Topological Materials and Phenomena #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1143/jpsj.79.053702

published as J. Phys. Soc. Jpn. 79, 053702 (2010). · 5 pages, 4 figures, after minor revision, accepted for publication in J. Phys. Soc. Jpn.

arxiv created 2010/03/16 · openalex publication_date 2010/04/26 · arxiv updated 2010/04/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We report on a band structure calculation and de Haas-van Alphen measurements of KFe₂As₂. Three cylindrical Fermi surfaces are found. Effective masses of electrons range from 6 to 18m_e, m_e being the free electron mass. Remarkable discrepancies between the calculated and observed Fermi surface areas and the large mass enhancement (\gtrsim 3) highlight the importance of electronic correlations in determining the electronic structures of iron pnicitide superconductors.

Citations

• Superconducting Fe-Based Compounds(A1−xSrx)Fe2As2withA=Kand Cs with Transition Temperatures up to 37 K
• Superconductivity and Crystal Structures of (Ba1−xKx)Fe2As2 (x=0–1)

Cited by

• Strong Electronic Correlations in Iron Pnictides: Comparison of Optical Spectra for BaFe2As2-Related Compounds
• High-temperature superconductivity in iron-based materials