Optical study on intermediate-valence compounds Yb1−xLuxAl3

Optical study on intermediate-valence compounds Yb_1−xLu_xAl₃

Lv J L^{1, 2}, Luo J L^{1, 2, 3}, Wang N L^{3, 4, †}

(color online) (a)–(e) Optical reflectance spectra of Yb_1−xLu_xAl₃ (x = 0, 0.25, 0.5, 0.75, and 1 ) single crystals at five different temperatures. The insets show the spectra up to 8000 cm⁻¹. (f)–(j) The real part of optical conductivity of Yb_1−xLu_xAl₃ obtained through the Kramers–Kronig transformation. The insets show the expanded spectra in the low energy region.