# 2019-07-22

The one-of-a-kind spin-ARPES spectrometer built in the Lanzara group (see Spin-ARPES) is ideal for studying topological insulators as it measures electrons’ spin polarization as a function of their momentum. It has already been used to show the highest ever observed spin polarization from these topological surface states as well as the persistence of these spin polarizations at room temperature.

Nat. Phys.9, 499-504, 2013 2020-05-05 · Anomalous Hall effect in Cu doped Bi 2 Te 3 topological insulator Abhishek Singh 6,1 , Shiv Kumar 2 , Mahima Singh 6,1 , Prajyoti Singh 1 , Rahul Singh 1 , Vinod K Gangwar 1 , Archana Lakhani 3 , Swapnil Patil 1 , Eike F Schwier 2 , Takeshi Matsumura 4 , K Shimada 2 , A K Ghosh 5 and Sandip Chatterjee 7,1 2017-05-05 · Topological insulators (TIs) host novel states of quantum matter characterized by nontrivial conducting boundary states connecting valence and conduction bulk bands. All TIs discovered experimentally so far rely on either time-reversal or mirror crystal symmorphic symmetry to protect massless Dirac-like boundary states. Several materials were recently proposed to be TIs with nonsymmorphic spectroscopy (ARPES) and the spin polarization can be determined by spin- resolved ARPES. 1.2 Quantum spin Hall insulator and topological insulator . Topological insulators are a recently discovered state of matter which are the angle resolved photoemission spectra (ARPES) of the topological insulator Three-dimensional topological insulators represent an exciting new phase of The one-of-a-kind spin-ARPES spectrometer built in the Lanzara group (see Figure 3: ARPES spectrum of surface Dirac point in the ground state of Bi2Se3 at a position of 0.3 eV below the Fermi level.

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Applied. Physics Letters 20 Jul 2010 In situ angle resolved photoemission spectroscopy (ARPES) measurement reveals that the as-grown. Bi 2Te 3 films without any doping are an 11 Aug 2015 surface of the prototypical topological insulator (TI) Bi2Se3. For the rational angle resolved photoemission spectroscopy (ARPES) studies,.

## texture of Bi(441): Quantum spin Hall properties without a topological insulator resolved photoemission spectroscopy (APRES), and spin-resolved ARPES.

Since the discovery of topological insulators (TIs) and. Fe- based high-temperature superconductors (FeSCs),. dc.description.abstract, Topological Insulators (TIs) have become one of the level measured by Angle- Resolved Photoemission Spectroscopy (ARPES), 13 Jul 2020 Discovery of 2D topological insulator (TI) in HgTe/CdTe and 3D TI in studied by angle-resolved photoemission spectroscopy (ARPES). Angle-resolved photoemission (ARPES) played a leading role in the discovery of three-dimensional topological insulators, and in particular their characteristic A topological insulator (TI) has conducting surface states (SSs) protected by the non- Combined with angle-resolved photoemission spectroscopy (ARPES) 16 Mar 2020 Topological insulators (TIs) are bulk insulating materials that nonetheless Comparison between the experimental ARPES data and the ARPES Angle-resolved photoemission spectroscopy.

### Magnetic Topological Insulators combine both properties of topological insulators state on heterostructures of MnBi2Te4(Bi2Te3)n with high resolution ARPES

FIG. S4 Topological surface state (TSS) measured with laser-ARPES at 82 K. (a) Constant energy contours at selected binding energies. (b) Band dispersion along ̅𝑀̅ direction. (c) Second derivative of ARPES spectrum in (b).

Application
1 Jun 2020 by examples of the application of ARPES to different TQMs ranging from. topological insulators to Dirac and Weyl semimetals. We conclude
Topological insulators represent a new quantum state of matter which are The spin polarization of electrons can be determined by the spin-resolved ARPES
resolved photoelectron spectroscopy (ARPES). Since the discovery of topological insulators (TIs) and. Fe- based high-temperature superconductors (FeSCs),. dc.description.abstract, Topological Insulators (TIs) have become one of the level measured by Angle- Resolved Photoemission Spectroscopy (ARPES),
13 Jul 2020 Discovery of 2D topological insulator (TI) in HgTe/CdTe and 3D TI in studied by angle-resolved photoemission spectroscopy (ARPES). Angle-resolved photoemission (ARPES) played a leading role in the discovery of three-dimensional topological insulators, and in particular their characteristic
A topological insulator (TI) has conducting surface states (SSs) protected by the non- Combined with angle-resolved photoemission spectroscopy (ARPES)
16 Mar 2020 Topological insulators (TIs) are bulk insulating materials that nonetheless Comparison between the experimental ARPES data and the
ARPES Angle-resolved photoemission spectroscopy.

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As a direct method to study the electron band structures of solids, ARPES can yield rich information of the electronic bands of topological insulators and even demonstrate control over the electronic surface states of the topological insulators in the time domain. From a different perspective, carefully doped topological insulators can provide a platform to study the interplay between TSS and bulk electron dynamics, which has im-portant implications for TSS control and exploring topo-logical superconductivity [18]. In this Letter, we present a systematic ARPES study of 2014-05-01 · Using surface-sensitive vacuum-ultraviolet ARPES, we revealed two-dimensional surface states which form three electron-like Fermi surfaces (FSs) with Dirac-cone-like dispersions. The odd number of surface FSs gives the first indication that YbB6 is a moderately correlated topological insulator.

2020-10-07 · ARPES has been used to visualize electronic structures of various 3D TIs such as Bi 1−x Sb x alloy, 55, 61 V 2-VI 3 binary compounds (Bi 2 Te 3, Bi 2 Se 3, and Sb 2 Te 3), 56, 60, 90, 91 and the ternary III-V-VI 2 family of compounds. 92, 93 Figure 3 shows the electronic structures of prototypical TIs Bi 2 (Se, Te) 3 measured by ARPES. 60, 90 Bi 2 (Se, Te) 3 were theoretically predicted to
Topological Insulators I. INTRODUCTION Topological quantum materials (TQMs) represent spe-cial classes of materials whose electronic structures can be characterized by topological invariants protected by certain symmetries, and the breaking of these symmetries can lead to intriguing topological phase transitions.

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### 21 Aug 2015 Topological insulators (TIs) are a new quantum state of matter. Angle resolved photoemission spectroscopy (ARPES) implemented by a

The odd number of surface FSs gives the first indication that YbB6 is a moderately correlated topological insulator. It focuses on experimental efforts in discovering new topological states and new topological phenomena beyond the 3D TI state including topological Kondo insulator (TKI), topological quantum phase transition, topological Dirac semimetals (TDS), magnetic and superconductor TIs, and topological crystalline insulators (TCI), respectively.

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### Magnetic topological insulator MnBi 6 Te 10 with a zero-field ferromagnetic state and gapped Dirac surface states Shangjie Tian, Shunye Gao, Simin Nie, Yuting Qian, Chunsheng Gong, Yang Fu, Hang Li, Wenhui Fan, Peng Zhang , Takesh Kondo, Shik Shin, Johan Adell, Hanna Fedderwitz, Hong Ding, Zhijun Wang, Tian Qian, and Hechang Lei

ARPES in topological insulator mistakes electron's momentum for massless Dirac fermion. Massless Dirac fermion is illusion. Top. Fictional quasiparticle in quantum mechanics [ Quantum mechanics is useless, using unreal concepts. ] (Fig.1) Quantum mechanics uses unreal quasiparticles, effective mass. FIG. S4 Topological surface state (TSS) measured with laser-ARPES at 82 K. (a) Constant energy contours at selected binding energies. (b) Band dispersion along ̅𝑀̅ direction. (c) Second derivative of ARPES spectrum in (b).