Magneto-Transport and High-Resolution Angle-Resolved Photoelectron Spectroscopy Studies of Palladium Doped Bi${}_2$Te${}_3$

Abstract

We have performed magneto-transport and high-resolution angle-resolved photoelectron spectroscopy (ARPES) measurements on palladium (Pd) doped topological insulator Pd${}_x$Bi${}_2$Te${}_3$ (0 $\le$ x $\le$ 0.20) single crystals. We have observed unusually high values of magnetoresistance ($\sim$ 1500%) and mobility ($\sim$ 93000 cm${}^2$V${}^{-1}$s${}^{-1}$) at low temperatures for pristine Bi2Te3 that decrease on Pd doping. The Shubnikov-de Haas (SdH) oscillations have been detected for x = 0.05, 0.10, confirming the presence of 2D topological surface states (TSSs) for these samples. The Hall measurement shows the crossover from n-type charge carriers in pristine Bi${}_2$Te${}_3$ to p-type charge carriers upon Pd doping. The ARPES measurements show that the conduction band crosses the Fermi level for pristine Bi${}_2$Te${}_3$, and the Dirac point of the TSSs and bulk-derived valence bands indicated shift to lower binding energy upon Pd doping in a rigid-band-like way up to x $\sim$0.10. Based on the comparison of the parameters obtained from the SdH and ARPES measurements, the reduction in the kF value in the magneto-transport measurements likely due to the band bending induced by the Schottky barrier.

arXiv comment18 pages, 16 figures

References in corpus (31)

• Topological Insulators
• Topological Insulator Materials
• Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal Cd${}_3$As${}_2$
• Extremely large magnetoresistance and ultrahigh mobility in the topological Weyl semimetal NbP
• Hexagonal Warping Effects in the Surface States of Topological Insulator Bi${}_2$Te${}_3$
• Gate-Voltage Control of Chemical Potential and Weak Anti-localization in Bismuth Selenide
• Topological origin of subgap conductance in insulating bilayer graphene
• Two-dimensional Dirac fermions in a topological insulator: transport in the quantum limit
• STM imaging of electronic waves on the surface of Bi${}_2$Te${}_3$: topologically protected surface states and hexagonal warping effects
• Quantum transport evidence for a three-dimensional Dirac semimetal phase in Cd3As2
• Impurity effect on weak anti-localization in the topological insulator Bi2Te3
• Linear magnetoresistance caused by mobility fluctuations in the n-doped Cd3As2
• Gapless surface Dirac cone in antiferromagnetic topological insulator MnBi${}_2$Te${}_4$
• Pressure induced Superconductivity in Topological Compound Bi2Te3
• Thickness-dependent bulk properties and weak anti-localization effect in topological insulator Bi2Se3
• Crystal Structure and Chemistry of Topological Insulators
• Persistence of Topological Order and Formation of Quantum Well States in Topological Insulators Bi2(Se,Te)3 under Ambient Conditions
• Linear magnetoresistance in topological insulators: Quantum phase coherence effects at high temperatures
• Superconductivity and non-metallicity induced by doping the topological insulators Bi2Se3 and Bi2Te3
• Extremely large non-saturating magnetoresistance and ultrahigh mobility due to topological surface states in metallic Bi2Te3 topological insulator
• Phase Diagram of Pressure-induced Superconductivity and its Relation to Hall Coefficient in Bi2Te3 Single Crystal
• Evidence of surface transport and weak anti-localization in single crystal of Bi2Te2Se topological insulator
• Bulk Band Structure of Bi${}_2$Te${}_3$
• Magnetotransport and induced superconductivity in Bi based three-dimensional topological insulators
• Electronic structure of a superconducting topological insulator Sr-doped Bi2Se3
• Observation of warping effects in the band and angular momentum structures of topological insulator Bi2Te3
• Subsurface impurities and vacancies in a three-dimensional topological insulator
• Weak Localization and Antilocalization in Topological Materials with Impurity Spin-Orbit Interactions
• Spin-orbital groundstates of Superconducting doped topological insulators (A Majorana Platform)
• Topological phase transitions driven by magnetic phase transitions in FexBi2Te3 (0 < x < 0.1) single crystals
• Evidence for topological surface states in metallic single crystals of Bi2Te3

Cited by in corpus (2)

• Anisotropic Light-Matter Interactions in Single Crystal Topological Insulator Bismuth Selenide
• Electronic Transport Studies of Ag-doped Bi2Se3 Topological Insulator