Energy gap tuning and gate-controlled topological phase transition in InAs/In${}_x$Ga${}_{1-x}$Sb composite quantum wells

H. Irie, T. Akiho, F. Couëdo +3

We report transport measurements of strained InAs/In${}_x$Ga${}_{1-x}$Sb composite quantum wells (CQWs) in the quantum spin Hall phase, focusing on the control of the energy gap thro…