MinMaj7

Root position - root on 6th & 5 th string...
"The minor major seventh is built with the formula 1-b3-5-7 (root, minor 3rd, perfect 5th and major 7th). 
Note that the m(Maj7) often is played in conjunction with minor and minor seventh and in these situations creates a movement in the middle voice".
https://www.guitar-chord.org/m-maj7.html