Quantum pumping through the surface states of a topological insulator

Nikoofard, Hossein; Esmaeilzadeh, Mahdi; Farghadan, Rouhollah; Sun, Jia

doi:10.1103/physrevb.106.165127

Cited by 5 publications

(2 citation statements)

References 89 publications

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“…[3,[6][7][8] Three-dimensional (3D) topological insulators (TIs) have spin-momentum locked surface states, which possess large SOC and become good candidates for designing spintroninc devices. [1,6,[9][10][11][12][13] Helicity dependent photocurrent (HDPC) is an important method to investigate the surface states of 3D TIs, and it has been used to explore the properties of the surface states of Bi 2 Se 3 thin films and nanoplates, Bi 2 Te 3 thin films, Sb 2 Te 3 and (Bi 1−x Sb x ) 2 Te 3 thin films. [4,[14][15][16][17] Besides, the HDPC can further expand the versatility of the charge-spin interchange in the topological insulator by utilizing the polarization of photons.…”

Section: Introductionmentioning

confidence: 99%

Investigation of helicity-dependent photocurrent of surface states in (Bi_0.7Sb_0.3)₂Te₃ nanoplate

Yu 喻,

Yu 俞,

Chen 陈

et al. 2024

Chinese Phys. B

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Helicity dependent photocurrent (HDPC) of the surface states in a high-quality topological insulator (Bi$_{0.7}$Sb$_{0.3}$)$_2$Te$_3$ nanoplate grown by chemical vapor deposition (CVD) is investigated. By investigating the angle dependent HDPC, it is found that the HDPC is mainly contributed by the circular photogalvanic effect (CPGE) current when the incident plane is perpendicular to the connection of the two contacts, whereas the circular photon drag effect (CPDE) dominates the HDPC when the incident plane is parallel to the connection of the two contacts. In addition, the CPGE of the (Bi$_{0.7}$Sb$_{0.3}$)$_2$Te$_3$ nanoplate is regulated by temperature, light power, excitation wavelength, the source-drain and ionic liquid top-gate voltages, and the regulation mechanisms are discussed. It is demonstrated that (Bi$_{0.7}$Sb$_{0.3}$)$_2$Te$_3$ nanoplates may provide a good platform for novel opto-spintronics devices.

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Section: Introductionmentioning

confidence: 99%

Investigation of helicity-dependent photocurrent of surface states in (Bi_0.7Sb_0.3)₂Te₃ nanoplate

Yu 喻,

Yu 俞,

Chen 陈

et al. 2024

Chinese Phys. B

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“…Three-dimensional (3D) topological insulators (TIs), as a new quantum phase of mater, are characterized by gapless spin-textured surface states that reside within the bulk band gap. [1][2][3][4][5][6] The electrons on the surface states of 3D TIs behave as Dirac fermions bearing a characteristic called spinmomentum locking. The unique properties of topological surface states make them promising in the field of spintronic devices and quantum computing.…”

Section: Introductionmentioning

confidence: 99%

Helicity-dependent photoconductance of the edge states in the topological insulator Bi₂Te₃

Zhou

Chen

et al. 2023

Chinese Phys. B

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The helicity-dependent photoconductance of the edge states in three-dimensional topological insulator Bi$_2$Te$_3$ films was investigated. It was revealed that the helicity-dependent photoconductivity current on the left edge of the Bi$_2$Te$_3$ film showed an opposite sign with that on the right edge. Besides, the helicity-dependent photoconductivity current increased linearly with the applied longitudinal electric field, and it reversed the sign as the reversal of the electric field. As the thickness of the Bi$_2$Te$_3$ film increased, the helicity-dependent photoconductivity current also increased. Theoretical analysis suggested that the helicity-dependent photo-conductivity current may come from the intrinsic spin orbit coupling (SOC) or the SOC introduced by the chiral impurities or defects.

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Spatial distribution of photo-induced anomalous Hall effects of the top and bottom surface states in topological insulators Sb2Te3

Lang

Hong

et al. 2023

Physica E: Low-dimensional Systems and Nanostructures

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Quantum pumping through the surface states of a topological insulator

Cited by 5 publications

References 89 publications

Investigation of helicity-dependent photocurrent of surface states in (Bi_0.7Sb_0.3)₂Te₃ nanoplate

Investigation of helicity-dependent photocurrent of surface states in (Bi_0.7Sb_0.3)₂Te₃ nanoplate

Helicity-dependent photoconductance of the edge states in the topological insulator Bi₂Te₃

Spatial distribution of photo-induced anomalous Hall effects of the top and bottom surface states in topological insulators Sb2Te3

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Quantum pumping through the surface states of a topological insulator

Cited by 5 publications

References 89 publications

Investigation of helicity-dependent photocurrent of surface states in (Bi0.7Sb0.3)2Te3 nanoplate

Investigation of helicity-dependent photocurrent of surface states in (Bi0.7Sb0.3)2Te3 nanoplate

Helicity-dependent photoconductance of the edge states in the topological insulator Bi2Te3

Spatial distribution of photo-induced anomalous Hall effects of the top and bottom surface states in topological insulators Sb2Te3

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Investigation of helicity-dependent photocurrent of surface states in (Bi_0.7Sb_0.3)₂Te₃ nanoplate

Investigation of helicity-dependent photocurrent of surface states in (Bi_0.7Sb_0.3)₂Te₃ nanoplate

Helicity-dependent photoconductance of the edge states in the topological insulator Bi₂Te₃