Friess, B.
Peng, Y.
Rosenow, B.
von Oppen, F.
Umansky, V.
von Klitzing, K.
Smet, J. H.
Article History
Received: 10 August 2016
Accepted: 17 June 2017
First Online: 24 July 2017
Competing interests
: The authors declare no competing financial interests.