Quantum Oscillations and Hall Anomaly of Surface States in the Topological Insulator Bi2Te3

@article{Qu2010QuantumOA,
  title={Quantum Oscillations and Hall Anomaly of Surface States in the Topological Insulator Bi2Te3},
  author={Dongxia Qu and Yew San Hor and J. W. Xiong and Robert J. Cava and Nai Phuan Ong},
  journal={Science},
  year={2010},
  volume={329},
  pages={821 - 824}
}
Carrier Mobility in Topological Insulators In addition to an energy gap, which is a characteristic of all band insulators, the electronic structure of the recently discovered three-dimensional topological insulators Bi2Te3 and Bi2Se3 contains a surface state with a Dirac-like dispersion. This state is predicted to be associated with high carrier mobility. However, the transport properties of the surface state are obscured by the bulk material and challenging to measure. Qu et al. (p. 821… 
Quantum Hall effect on top and bottom surface states of topological insulator (Bi1-xSbx)2Te3 films.
TLDR
The realization of the quantum Hall effect on the surface Dirac states in (Bi1-xSbx)2Te3 films is reported and may pave a way toward topological insulator-based electronics.
Weak Anti-localization and Quantum Oscillations of Surface States in Topological Insulator Bi2Se2Te
TLDR
It is demonstrated that Bi2Se2Te can serve as a suitable topological insulator candidate for achieving intrinsic quantum transport of surface Dirac fermions and weak anti-localization and quantum oscillations originated from surface states in Bi2 Se2Te crystals.
Emergent surface superconductivity in the topological insulator Sb2Te3.
TLDR
Direct evidence from transport, the unprecedentedly large diamagnetic screening, and the presence of ∼25 meV gaps detected by scanning tunnelling spectroscopy reveal the superconducting condensate to emerge first in surface puddles, with the onset of global phase coherence at ∼9 K.
Electron–hole asymmetry of the topological surface states in strained HgTe
TLDR
This work establishes the existence of exclusively surface-dominated transport via the observation of an ambipolar surface quantum Hall effect and quantum oscillations in the Seebeck and Nernst effect, and shows that, whereas the thermopower is diffusion driven for surface electrons, both diffusion and phonon drag contributions are essential for the hole surface carriers.
Visualizing Surface States of Topological Insulators with Scanning Tunneling Microscopy
Topological insulators are materials that have a bulk band gap similar to commonly known insulators, but have conducting states on their edge or surface. The bulk band gap is generated because of the
Low-energy electrodynamics of the surface states of three-dimensional topological insulators by time-domain terahertz spectroscopy
Three-dimensional (3D) topological insulators are newly discovered states of matter with robust metallic surface states protected by the topological properties of their bulk wavefunctions. The
Quantum Capacitance in Topological Insulators
TLDR
This work reports on an experimental observation of Shubnikov-de Haas oscillations in quantum capacitance measurements, which originate from topological helical states, and demonstrates easy access to the surface states at relatively high temperatures up to 60 K.
Transport evidence of robust topological surface state in BiTeCl single crystals, the first strong inversion asymmetric topological insulator
Three-dimensional (3D) topological insulators (TIs) are new forms of quantum matter that are characterized by their insulating bulk state and exotic metallic surface state, which hosts helical Dirac
Controlling and distinguishing electronic transport of topological and trivial surface states in a topological insulator
Topological insulators (TI), with characteristic Dirac-fermion topological surface states (TSS), have emerged as a new class of electronic materials with rich potentials for both novel physics and
Dirac electron states formed at the heterointerface between a topological insulator and a conventional semiconductor.
TLDR
Tunnelling spectroscopy on heterojunction devices composed of p-type topological insulator (Bi1−xSbx)2Te3 and n-type conventional semiconductor InP reveals a systematic dependence of the Fermi velocity and Dirac point energy on the composition x.
...
...

References

SHOWING 1-10 OF 16 REFERENCES
Experimental Realization of a Three-Dimensional Topological Insulator, Bi2Te3
TLDR
The results establish that Bi2Te3 is a simple model system for the three-dimensional topological insulator with a single Dirac cone on the surface, and points to promising potential for high-temperature spintronics applications.
A topological Dirac insulator in a quantum spin Hall phase
TLDR
The direct observation of massive Dirac particles in the bulk of Bi0.9Sb0.1 is reported, which suggests that the observed surface state on the boundary of the bulk insulator is a realization of the ‘topological metal’, which has potential application in developing next-generation quantum computing devices that may incorporate ‘light-like’ bulk carriers and spin-textured surface currents.
Observation of a large-gap topological-insulator class with a single Dirac cone on the surface
Recent experiments and theories have suggested that strong spin–orbit coupling effects in certain band insulators can give rise to a new phase of quantum matter, the so-called topological insulator,
Topological surface states protected from backscattering by chiral spin texture
TLDR
It is demonstrated that the chiral nature of these states protects the spin of the carriers, potentially useful for spin-based electronics, in which long spin coherence is critical, and also for quantum computing applications, where topological protection can enable fault-tolerant information processing.
Topological insulators with inversion symmetry
Topological insulators are materials with a bulk excitation gap generated by the spin-orbit interaction that are different from conventional insulators. This distinction is characterized by ${Z}_{2}$
Observation of Unconventional Quantum Spin Textures in Topological Insulators
TLDR
Using Mott polarimetry, it is demonstrated that topological quantum numbers are completely determined from spin texture–imaging measurements and the origin of its topological order and unusual chiral properties are identified.
Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
We show that the quantum spin Hall (QSH) effect, a state of matter with topological properties distinct from those of conventional insulators, can be realized in mercury telluride–cadmium telluride
Superconducting proximity effect and majorana fermions at the surface of a topological insulator.
TLDR
It is shown that linear junctions between superconductors mediated by the topological insulator form a nonchiral one-dimensional wire for Majorana fermions, and that circuits formed from these junctions provide a method for creating, manipulating, and fusing Majorana bound states.
Topological field theory of time-reversal invariant insulators
We show that the fundamental time-reversal invariant (TRI) insulator exists in $4+1$ dimensions, where the effective-field theory is described by the $(4+1)$-dimensional Chern-Simons theory and the
Quantum interference in macroscopic crystals of nonmetallic Bi2Se3.
TLDR
At low temperatures, a novel type of magnetofingerprint signal which involves the spin degrees of freedom is uncovered which reveals the nature of the in-gap conducting states and their relation to the topological surface states.
...
...