Title: Pressure Induced Superconductivity in the New Compound ScZrCo1-$δ$,
Abstract: It is widely perceived that the correlation effect may play an important role
in several unconventional superconducting families, such as cuprate, iron-based
and heavy-fermion superconductors. The application of high pressure can tune
the ground state properties and balance the localization and itineracy of
electrons in correlated systems, which may trigger unconventional
superconductivity. Moreover, non-centrosymmetric structure may induce the spin
triplet pairing which is very rare in nature. Here, we report a new compound
ScZrCo1-${\delta}$ crystallizing in the Ti2Ni structure with the space group of
FD3-MS without a spatial inversion center. The resistivity of the material at
ambient pressure shows a bad metal and weak semiconducting behavior.
Furthermore, specific heat and magnetic susceptibility measurements yield a
rather large value of Wilson ratio ~4.47. Both suggest a ground state with
correlation effect. By applying pressure, the up-going behavior of resistivity
in lowering temperature at ambient pressure is suppressed and gradually it
becomes metallic. At a pressure of about 19.5 GPa superconductivity emerges. Up
to 36.05 GPa, a superconducting transition at about 3.6 K with a quite high
upper critical field is observed. Our discovery here provides a new platform
for investigating the relationship between correlation effect and
superconductivity.