Angle-resolved photoemission study of USb2 the 5f band struc

Single crystal antiferromagnetic USb2 was studied at 15K by angle-resolved photoemission with an overall energy resolution of 24 meV. The measurements unambiguously show the dispersion of extremely narrow bands situated near the Fermi level. The peak at th

Angle-resolved photoemission study of USb2: the 5f band structure

E. Guziewicz1, 2, T. Durakiewicz1, 3, M. T. Butterfield1, C. G. Olson4

J. J. Joyce1, A. J. Arko1, J. L. Sarrao1, D. P. Moore1, L. Morales1 1Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA

2Institute of Physics, Polish Academy of Sciences, 02-668 Warszawa, Poland

3Institute of Physics, Maria Sk?odowska-Curie University, 20-031 Lublin, Poland 4Ames Laboratory, Iowa State University, Ames IA, USA

ABSTRACT

Single crystal antiferromagnetic USb2 was studied at 15K by angle-resolved photoemission with an overall energy resolution of 24 meV. The measurements unambiguously show the dispersion of extremely narrow bands situated near the Fermi level. The peak at the Fermi level represents the narrowest feature observed in 5f-electron photoemission to date. The natural linewidth of the feature just below the Fermi level is not greater than 10 meV. Normal emission data indicate a three dimensional aspect to the electronic structure of this layered material.

1

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