2007
DOI: 10.1103/physrevb.76.115435
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Reentrant Kondo effect in Landau-quantized graphene: Influence of the chemical potential

Abstract: We have studied the interplay of an Anderson impurity in Landau quantized graphene, with special emphasis on the influence of the chemical potential. Within the slave-boson mean-field theory, we found reentrant Kondo behaviour by varying the chemical potential or gate voltage. Between Landau levels, the density of states is suppressed, and by changing the graphene's Fermi energy, we cross from metallic to semiconducting regions. Hence, the corresponding Kondo behaviour is also influenced. The f-level spectral … Show more

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Cited by 23 publications
(3 citation statements)
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“…As the first prototype, the fascinating material graphene has been extensively studied for its unusual electrical, optical, magnetic, and mechanical properties. [1][2][3][4][5][6][7][8][9][10] However, the absence of a band gap limits its application as a transistor. One of the alternative way is to search for other novel 2D materials that are analogous to graphene but with semiconducting characteristics and other promising properties.…”
Section: Introductionmentioning
confidence: 99%
“…As the first prototype, the fascinating material graphene has been extensively studied for its unusual electrical, optical, magnetic, and mechanical properties. [1][2][3][4][5][6][7][8][9][10] However, the absence of a band gap limits its application as a transistor. One of the alternative way is to search for other novel 2D materials that are analogous to graphene but with semiconducting characteristics and other promising properties.…”
Section: Introductionmentioning
confidence: 99%
“…Most resulting MA-graphene systems are spin-polarized, 17,18 and they have various potential applications. They are ideal systems for studying the unconventional Kondo physics, [19][20][21][22] and can be used as basic materials for the design of spintronics. MA-graphene system can be used as catalysts.…”
Section: Introductionmentioning
confidence: 99%
“…The discoveries of the fractional quantum Hall effect [3,4], broken symmetry states at zero filling factor [5], or spin-valley quantum Hall ferromagnetism [6] have all been achieved in high-mobility suspended graphene devices or graphene on hexagonal boron nitride (hBN) substrates, where the influence of external disorder was minimized. However, the ability of graphene to screen an external impurity potential not only determines the strength of electron-electron interaction and related physical properties such as the dielectric constant [7] or the Fermi velocity [8] but also induces another class of manybody effects such as the Anderson orthogonality catastrophe [9,10], local moment formation [11,12] and the Kondo effect [13][14][15]. This latter class of phenomena, where disorder itself plays a central role, remains poorly explored in graphene.…”
mentioning
confidence: 99%