Quantum magnetotransport properties of ultrathin topological insulator films
Author(s) -
M. Tahir,
K. Sabeeh,
Udo Schwingenschlögl
Publication year - 2013
Publication title -
journal of applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.699
H-Index - 319
eISSN - 1089-7550
pISSN - 0021-8979
DOI - 10.1063/1.4789626
Subject(s) - condensed matter physics , zeeman effect , landau quantization , topological insulator , magnetic field , quantum oscillations , quantum hall effect , quantum phase transition , insulator (electricity) , metal–insulator transition , shubnikov–de haas effect , physics , magnetoresistance , quantum , phase transition , electrical resistivity and conductivity , quantum mechanics , fermi surface , superconductivity , optoelectronics
We study the quantum magnetotransport in ultrathin topological insulator films in an external magnetic field considering hybridization between the upper and lower surfaces of the film. We investigate the two possible mechanisms for splitting of Landau levels, Zeeman and hybridization effects, and show that their interplay leads to minima in the collisional and Hall conductivities with a metal-to-insulator phase transition at the charge neutrality point. Hall plateaus arise at unusual multiples of e2/h . Evidence of a quantum phase transition for the zeroth and splitting of the higher Landau levels is found from the temperature and magnetic field dependences of the transport
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom