TOPOLOGICAL INSULATOR AND THE DIRAC EQUATION
نویسندگان
چکیده
منابع مشابه
Transferring MBE-grown topological insulator films to arbitrary substrates and metal-insulator transition via Dirac gap.
Mechanical exfoliation of bulk crystals has been widely used to obtain thin topological insulator (TI) flakes for device fabrication. However, such a process produces only microsized flakes that are highly irregular in shape and thickness. In this work, we developed a process to transfer the entire area of TI Bi2Se3 thin films grown epitaxially on Al2O3 and SiO2 to arbitrary substrates, maintai...
متن کاملDirect observation and temperature control of the surface Dirac gap in a topological crystalline insulator
Since the advent of topological insulators hosting Dirac surface states, efforts have been made to gap these states in a controllable way. A new route to accomplish this was opened up by the discovery of topological crystalline insulators where the topological states are protected by crystal symmetries and thus prone to gap formation by structural changes of the lattice. Here we show a temperat...
متن کاملNonmagnetic band gap at the Dirac point of the magnetic topological insulator (Bi1−xMnx)2Se3
Magnetic doping is expected to open a band gap at the Dirac point of topological insulators by breaking time-reversal symmetry and to enable novel topological phases. Epitaxial (Bi(1-x)Mn(x))2Se3 is a prototypical magnetic topological insulator with a pronounced surface band gap of ∼100 meV. We show that this gap is neither due to ferromagnetic order in the bulk or at the surface nor to the loc...
متن کاملDual Dirac Liquid on the Surface of the Electron Topological Insulator
The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We discuss a non-Fermi liquid gapless metallic surface state of the topological band insulator. It has an odd number of gapless Dirac fermions coupled to a noncompact Uð1Þ gauge field. This can be viewed as a vortex dual to the conventional Dirac fermion surface state. This sur...
متن کاملUltrafast electron dynamics at the Dirac node of the topological insulator Sb2Te3
Topological insulators (TIs) are a new quantum state of matter. Their surfaces and interfaces act as a topological boundary to generate massless Dirac fermions with spin-helical textures. Investigation of fermion dynamics near the Dirac point (DP) is crucial for the future development of spintronic devices incorporating topological insulators. However, research so far has been unsatisfactory be...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: SPIN
سال: 2011
ISSN: 2010-3247,2010-3255
DOI: 10.1142/s2010324711000057