Observation of bands with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>d</mml:mi><mml:mrow><mml:mi>x</mml:mi><mml:mi>y</mml:mi></mml:mrow></mml:msub></mml:math> orbital character near the Fermi level in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">NdFeAs</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant="normal">P</mml:mi><mml:mi>x</mml:mi></…

We studied the band structure of $\mathrm{Nd}\phantom{\rule{0.16em}{0ex}}\mathrm{Fe}\phantom{\rule{0.16em}{0ex}}{\mathrm{As}}_{1\ensuremath{-}x}{\mathrm{P}}_{x}{\mathrm{O}}_{0.9}{\mathrm{F}}_{0.1}$ ($x=0$, 0.2, 0.4, and 0.6) using angle-resolved photoemission spectroscopy (ARPES) measurements. Two hole bands, ${\ensuremath{\alpha}}_{1}$ $({d}_{xz})$ ${\ensuremath{\alpha}}_{3}$ $({d}_{{z}^{2}})$, were observed at Brillouin zone center in $P$-polarized light configuration, while other two ${\ensuremath{\alpha}}_{2}$ $({d}_{yz})$ \ensuremath{\gamma} $({d}_{xy})$, $S$-polarized alternative. The shifts downward as $x$ increases, which is consistent with theoretical prediction for change bond angle As/P-Fe-As/P. Furthermore, a small amount ${d}_{xy}$ orbital component was same binding energy that top band, thus indicating reconstruction originally degenerate $({d}_{xz}/{d}_{yz})$ bands by unoccupied band. level character accompanied ${T}_{\mathrm{c}}$ upturn $0.2&lt;x&lt;0.4$. continues to increase downward, crossing Fermi level. incipient on its could be an important ingredient high 1111-type iron-based superconductors.