Mortar or thin set for brick pavers
 

I have an existing concrete patio that I want to lay 1 1/4'' clay brick pavers on. I am going to use mortar for the 1/2'' joints when done. Can I use thin set as with ceramic tile or should I use regular mortar. I am not interested in using a sand base or tearing up the slab. Also I live in the dry climate of Southern California. Thanks for the input. Bill