Simple mechanisms that impede the Berry phase identification from magneto-oscillations

Abstract

The phase of quantum magneto-oscillations is often associated with the Berry phase and is widely used to argue in favor of topological nontriviality of the system (Berry phase $2\pi n+\pi$). Nevertheless, the experimentally determined value may deviate from $2\pi n+\pi$ arbitrarily, therefore more care should be made analyzing the phase of magneto-oscillations to distinguish trivial systems from nontrivial. In this paper we suggest two simple mechanisms dramatically affecting the experimentally observed value of the phase in three-dimensional topological insulators: (i) magnetic field dependence of the chemical potential, and (ii) possible nonuniformity of the system. These mechanisms are not limited to topological insulators and can be extended to other topologically trivial and non-trivial systems.

arXiv comment9 pages, 4 figures, in published version the title was changed

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Cited by in corpus (8)

• Quantum transport evidence of Weyl fermions in an epitaxial ferromagnetic oxide
• Structural distortion behind the nematic superconductivity in Sr${}_x$Bi${}_2$Se${}_3$
• Phase Slips and Parity Jumps in Quantum Oscillations of Inverted InAs/GaSb Quantum Wells
• Reducing the impact of bulk doping on transport properties of Bi-based 3D topological insulators
• Density of states measurements for heavy subband of holes in HgTe quantum wells
• Quantum oscillations of transport coefficients and capacitance: an unexpected manifestation of the spin-Hall effect
• Is it possible to determine unambiguously the Berry phase solely from quantum oscillations?
• High and Magnetic-field-dependent Surface Carriers Mobility in 3D Topological Insulators without Bulk States