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This book presentsthe transport studies of topological insulator thin films grown by molecularbeam epitaxy. Through band structure engineering, the ideal topologicalinsulators, (Bi1-xSbx)2Te3 ternary alloys, are successfully fabricated, whichpossess truly insulating bulk and tunable conducting surface states. Furthertransport measurements on these ternary alloys reveal a disentanglement betweenthe magnetoelectric and thermoelectric properties. In magnetically dopedtopological insulators, the fascinating quantum anomalous Hall effect wasexperimentally observed for the first time. Moreover, the topology-drivenmagnetic quantum phase transition was Systematically controlled by varying thestrength of the spin-orbital coupling. Readers will not only benefit from thedescription of the technique of transport measurements, but will also be inspired bythe understanding of topological insulators.
List of contents
Introduction.- Experimental setup and methods.- Band structure engineering in TIs.- Topology-driven magnetic quantum phase transition.- Quantum anomalous Hall effect.- Dichotomy between electrical and thermoelectric properties.- Concluding remarks.- References.- Acknowledgement.- Appendix A.- Appendix B.- Publications.
About the author
Jinsong Zhang received his B.Sc. in Physic in
Tsinghua University, P. R. China in 2008. He obtained his Ph.D. in Physics from
Physics Department of Tsinghua University in January 2014. His major research
project in Prof. Yayu Wang's group was the transport studies of the electric,
magnetic and thermoelectric properties in topological insulator thin films. At
present, he is a post-doc fellow in Prof. Yi Cui's group in the Department of
Material Science and Engineering, Stanford University. His current projects are
focusing on the fabrication and characterization of two-dimensional layer
materials.
Summary
This book presents
the transport studies of topological insulator thin films grown by molecular
beam epitaxy. Through band structure engineering, the ideal topological
insulators, (Bi1−xSbx)2Te3 ternary alloys, are successfully fabricated, which
possess truly insulating bulk and tunable conducting surface states. Further
transport measurements on these ternary alloys reveal a disentanglement between
the magnetoelectric and thermoelectric properties. In magnetically doped
topological insulators, the fascinating quantum anomalous Hall effect was
experimentally observed for the first time. Moreover, the topology-driven
magnetic quantum phase transition was Systematically controlled by varying the
strength of the spin-orbital coupling. Readers will not only benefit from the
description of the technique of transport measurements, but will also be inspired by
the understanding of topological insulators.
