TY - JOUR AU - González Herrera, Elvira María AU - Lin, Y. AU - Mendez, E. E. PY - 2001 DO - 10.1103/physrevb.63.033308 SN - 1098-0121 UR - https://hdl.handle.net/20.500.14352/60177 T2 - Physical review B AB - We have measured the zero-bias differential tunneling conductance of InAs/AlSb/GaSb/AlSb/InAs heterostructures at law temperatures (1.7 K