  We investigate one-way quantum deficit for $2\otimes d$ systems. Analytical
expressions of one-way quantum deficit under both von Neumann measurement and
weak measurement are presented. As an illustration, qubit-qutrit systems are
studied in detail. It is shown that there exists non-zero one-way quantum
deficit even quantum entanglement vanishes. Moreover, one-way quantum deficit
via weak measurement turns out to be weaker than that via von Neumann
measurement. The dynamics of entanglement and one-way quantum deficit under
dephasing channels is also investigated.
