Jiashu Wang1,Xinyu Liu1,Hoai Trinh1,Mykhaylo Ozerov2,Maksym Zhukovskyi1,Tatyana Orlova1,Dmitry Smirnov2,Badih Assaf1
University of Notre Dame1,National High magnetic field lab2
Jiashu Wang1,Xinyu Liu1,Hoai Trinh1,Mykhaylo Ozerov2,Maksym Zhukovskyi1,Tatyana Orlova1,Dmitry Smirnov2,Badih Assaf1
University of Notre Dame1,National High magnetic field lab2
Magnetic topological insulators have been greatly studied in the past decades to achieve and enhance the critical temperature of the Quantum anomalous Hall. One way to induce magnetization into TIs is by using the magnetic proximity effect (MPE). It will introduce a magnetic exchange gap which has never been directly measured. Pb<sub>1-x</sub>Sn<sub>x</sub>Se (0.16<x<0.4) is a topological crystalline insulator (TCI) with mirror protected gapless surface states and is lattice match with EuSe a magnetic insulator. It is thus an ideal platform to study the MPE. Here, we investigate the MBE growth of Pb<sub>1-x</sub>Sn<sub>x</sub>Se/EuSe heterostructures with x=0.1-0.3 and probe the exchange induced gap at the interface using magnetooptical spectroscopy. Landau level transitions can be extracted as of 4T and are fitted using a k●p quantum well model. The high mobility and low Fermi energy of these heterostructures will allow to directly probe the energy gap induced by the MPE.