Single crystal growth, transport, and electronic band structure of YCoGa5

• Single crystals of YCoGa5 were grown from the Ga self-flux method for the first time.
• No superconductivity is observed down to 1.75 K.
• The s–d scattering is the major scattering mechanism for resistivity.
• We figure out that the physics origin of the similar properties between YCoG5, YbCoGa5 and LuCoGa5.

Single crystal of YCoGa5 has been grown via Ga self-flux. In this paper, we report the single crystal growth, crystallographic parameters, resistivity, heat capacity, and band structure results of YCoGa5. YCoGa5 accommodates the HoCoGa5 type structure (space group P4/mmm (No. 123), Z = 1, a = 4.2131(6) Å, c = 6.7929(13) Å, which is isostructural to the extensively studied heavy fermion superconductor system CeMIn5 (M = Co, Rh, Ir) and the unconventional superconductor PuCoGa5 with Tc = 18.5 K. No superconductivity is observed down to 1.75 K. Band structure calculation results show that its band at the Fermi level is mainly composed of Co-3d and Ga-4p electrons states, which explains its similarity of physical properties to YbCoGa5 and LuCoGa5.

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