Angle Resolved Photoemission from Nd(1.85)Ce(0.15)CuO(4) using High Energy Photons : A Fermi Surface Investigation

• We have performed an angle resolved photoemission study on a single crystal of the optimally electron doped (n-type) cuprate superconductor Nd2-xCexCuO4 (x=0.15) at a photon energy of 400 eV. The Fermi surface is mapped out and is, in agreement with earlier measurements, of hole-type with the expected Luttinger volume. However, comparing with previous low energy measurements, we observe a different Fermi surface shape and a different distribution of spectral intensity around the Fermi surface contour. The observed Fermi surface shape indicates a stronger electron correlation in the bulk as compared to the surface.

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Annan teknik -- Övrig annan teknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Other Engineering and Technologies -- Other Engineering and Technologies not elsewhere specified (hsv//eng)

Nyckelord

Antiferromagnetism; Doping (additives); Electric power measurement; Electron energy analyzers; Electronic structure; Electrons; Fermi surface; Neodymium compounds; Oxide superconductors; Photons; Single crystals; Synchrotron radiation

Semiconductor physics

Halvledarfysik

Material physics with surface physics

Materialfysik med ytfysik

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