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NaCl/KCl=1:10 (mass). They were thoroughly grounded into a mixture, and loaded into an evacuated quartz tube. The tube was kept at 1223 K for 24 hours and then slowly cooled to 873 K in 100 hours. Finally the quartz tube was cooled in the furnace after shutting off the power. Fe 1 . 04 (Te 0 . 66 Se 0 . 34 ) single crystal was obtained after dis- solving the flux in deionized water. The element com- positions of this single crystal were determined through energy-dispersive x-ray (EDX) analysis with dense sam- pling spots across a 0.4$_{×}$0.4 mm 2 surface area. The EDX result shows that the sample is homogeneous, and the maximal deviation of its compsitions is within 1.8%. The temperature dependence of the magnetic suscepti- bility (Fig. 1) does not show any signs of SDW or struc- tural transition. The resistivity data indicate that crystal reaches the zero resistance at about 9 K. However, the susceptibility measurements show that although regions of the sample become superconducting at 9 K, it reaches a bulk superconducting state at 2 K, with a transition width less than 3 K (10$_{%}$-90$_{%}$). This indicates that the bulk of the single crystal is quite homogeneous. With 1 T magnetic field, superconductivity is suppressed, and there is no sign of field-induced meta-magnetic transition. 

The photoemission data have been taken with Scienta R4000 electron analyzers at Beamline 9 of Hiroshima syn- chrotron radiation center (HSRC) and the Surface and Interface Spectroscopy (SIS) Beamline of Swiss Light Source (SLS). The typical angular resolution is 0.3 de- 

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gree, and the typical energy resolution is 15 meV. The sample was cleaved in situ , and measured under ultra- high-vacuum better than$_{5}$$_{×}$$_{10}$ $_{−}$11 torr . The sample ag- ing effects are carefully monitored to ensure they do not cause artifacts in our analyses and conclusions. The SIS beamline is equipped with an elliptically polarized undu- lator (EPU), which could switch the photon polarization between horizontal, vertical, or circular mode. This facil- itates the polarization dependence studies, which is use- ful in determining the orbital characters of the bands [22]. 

## III. BAND STRUCTURE AND FERMI SURFACE 

The photoemission intensities distribution of Fe 1 . 04 (Te 0 . 66 Se 0 . 34 ) at the Fermi energy is shown in Fig. 2(a). The data were taken at 15 K with 22 eV photons. Similar to the iron-pnictides, the spectral 

