Tailoring weak and metallic phases in a strong topological insulator by strain and disorder: Conductance fluctuations signatures

Shafiei, Mohammad; Fazileh, Farhad; Peeters, François M.; Milošević, Milorad V.

doi:10.1103/physrevb.109.045129

Phys. Rev. B

2024

DOI: 10.1103/physrevb.109.045129

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Tailoring weak and metallic phases in a strong topological insulator by strain and disorder: Conductance fluctuations signatures

Mohammad Shafiei,

Farhad Fazileh,

François M. Peeters

et al.

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2024

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Cited by 2 publications

References 38 publications

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Tuning the quantum phase transition of an ultrathin magnetic topological insulator

Shafiei,

Fazileh,

Peeters

et al. 2024

Phys. Rev. Materials

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Tuning the quantum phase transition of an ultrathin magnetic topological insulator

Shafiei,

Fazileh,

Peeters

et al. 2024

Phys. Rev. Materials

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Floquet engineering of axion and high-Chern number phases in a topological insulator under illumination

Shafiei,

Fazileh,

Peeters

et al. 2024

SciPost Phys. Core

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Quantum anomalous Hall, high-Chern number, and axion phases in topological insulators are characterized by its Chern invariant C (respectively, C=1, integer C>1, and C=0 with half-quantized Hall conductance of opposite signs on top and bottom surfaces). They are of recent interest because of novel fundamental physics and prospective applications, but identifying and controlling these phases has been challenging in practice. Here we show that these states can be created and switched between in thin films of Bi_22Se_33 by Floquet engineering, using irradiation by circularly polarized light. We present the calculated phase diagrams of encountered topological phases in Bi_22Se_33, as a function of wavelength and amplitude of light, as well as sample thickness, after properly taking into account the penetration depth of light and the variation of the gap in the surface states. These findings open pathways towards energy-efficient optoelectronics, advanced sensing, quantum information processing and metrology.

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Tailoring weak and metallic phases in a strong topological insulator by strain and disorder: Conductance fluctuations signatures

Cited by 2 publications

References 38 publications

Tuning the quantum phase transition of an ultrathin magnetic topological insulator

Tuning the quantum phase transition of an ultrathin magnetic topological insulator

Floquet engineering of axion and high-Chern number phases in a topological insulator under illumination

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