Spintronics aims to use the spin degrees of freedom for future information technologies. Quantum materials are a new class of materials that exhibit interesting properties with no counterpart in macroscopic world: quantum entanglement, quantum fluctuations, topology of the wave functions, etc.

The “marriage” of spintronics and quantum materials gave the birth to two exciting research fields. Firstly, the emergence of quantum materials provides new platforms to study the spin current in the quantum age beyond conventional metals and semiconductors. In this talk, I will first give some examples of quantum materials that can be used for long distance spin current transport and spin-orbit torque applications. On the other hand, spintronics could be used as a unique probe of special quantum materials/states that are either insulating or buried at the interface. In the second part of my talk, I will give some examples of quantum materials/states that can be identified by spin current.