Edge photocurrent in bilayer graphene due to inter-Landau-level transitions

Candussio, S.; Durnev, M. V.; Slizovskiy, Sergey; Jötten, T.; Keil, Jan-Niklas; Belkov, Vassilij; Yin, Jun; Yang, Yaping; Son, Seok‐Kyun; Mishchenko, Artem; Fal’ko, Vladimir I.; Ganichev, Sergey

doi:10.1103/physrevb.103.125408

Cited by 18 publications

(11 citation statements)

References 67 publications

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“…( 1) is attributed to the edge photogalvanic current, which is discussed in detail in Refs. [7,11,13,14,17,18,20]. In the next section we briefly address the basic physics of this phenomenon.…”

Section: Resultsmentioning

confidence: 99%

“…At low intensities, the THz radiation induced edge photocurrent caused by Drude-like absorption was studied in mono-and bi-layer graphene in Refs. [7,11,13,14,[17][18][19][20]. It was shown that the dc edge current is induced by the high-frequency electric field of the incident THz radiation due to the broken charge symmetry at the edge.…”

Section: Theorymentioning

confidence: 99%

“…An important access to the edge transport provides the study of the photocurrents excited by polarized light in the meanfree path vicinity of the edges. Photon helicity driven chiral [7,8] and helical [9,10] currents excited by circularly polarized radiation, as well as currents driven by linearly polarized radiation at zero magnetic fields [8,[11][12][13][14][15][16][17][18][19], quantum Hall [13] or cyclotron resonance [20] regimes present several examples of the edge photocurrents, for reviews see Refs. [11,14,21].…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear intensity dependence of terahertz edge photocurrents in graphene

Candussio,

Golub,

Bernreuter

et al. 2021

Preprint

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We report on the observation of terahertz radiation induced edge photogalvanic currents in graphene, which are nonlinear in intensity. The increase of the radiation intensities up to MW/cm 2 results in a complex nonlinear intensity dependence of the photocurrent. The nonlinearity is controlled by the back gate voltage, temperature and radiation frequency. A microscopic theory of the nonlinear edge photocurrent is developed. Comparison of the experimental data and theory demonstrates that the nonlinearity of the photocurrent is caused by the interplay of two mechanisms, i.e. by direct inter-band optical transitions and Drude-like absorption. Both photocurrents saturate at high intensities, but have different intensity dependencies and saturation intensities. The total photocurrent shows a complex sign-alternating intensity dependence. The functional behaviour of the saturation intensities and amplitudes of both kinds of photogalvanic currents depending on gate voltages, temperature, radiation frequency and polarization is in a good agreement with the developed theory.

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Section: Resultsmentioning

confidence: 99%

Section: Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nonlinear intensity dependence of terahertz edge photocurrents in graphene

Candussio,

Golub,

Bernreuter

et al. 2021

Preprint

Self Cite

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“…Note that for different sample cooldowns, the charge neutrality point (CNP) can occur at slightly different gate voltages. This is caused by, e.g., cooldowndependent charge trapping in the insulator [44,45]. In order to account for this, below we use the effective gate voltage…”

Section: Samples and Methodsmentioning

confidence: 99%

Nonlinear intensity dependence of photogalvanics and photoconductance induced by terahertz laser radiation in twisted bilayer graphene close to magic angle

Hubmann¹,

Soul²,

Battista³

et al. 2021

Preprint

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“…In the last decade it was demonstrated that a circularly polarized radiation can produce a dc electric current whose direction and magnitude are controlled by the radiation helicity, see e.g. [11,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]. A particularly intriguing phenomenon is the circular Hall effect arising in the absence of static magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

THz radiation induced circular Hall effect in graphene

Candussio,

Bernreuter,

Rockinger

et al. 2022

Preprint

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Edge photocurrent in bilayer graphene due to inter-Landau-level transitions

Cited by 18 publications

References 67 publications

Nonlinear intensity dependence of terahertz edge photocurrents in graphene

Nonlinear intensity dependence of terahertz edge photocurrents in graphene

Nonlinear intensity dependence of photogalvanics and photoconductance induced by terahertz laser radiation in twisted bilayer graphene close to magic angle

THz radiation induced circular Hall effect in graphene

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