Quantum pumping of layer pseudospin current in biased bilayer graphene

Wang, Jing; Lu, Haorui; Hu, Yue; Zhao, Wen‐Sheng; Wang, Gaofeng; Chan, K. S.

doi:10.1088/1361-6463/aa67c1

Cited by 2 publications

(4 citation statements)

References 26 publications

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“…This result can be useful in construction of interlayer tunnel-field-effect transistor [51] where graphene multilayers can be replaced with appropriate hybrids (see Fig.7). Next, all types of hybrids give the possibility of creating identical bilayers in one system which can be useful when developing bilayer graphene pseudospintronics based on the concept of layer pseudospin [29].…”

Section: Summary and Final Remarksmentioning

confidence: 99%

“…7). Next, all types of hybrids give the possibility of creating identical bilayers in one system which can be useful when developing bilayer graphene pseudospintronics based on the concept of layer pseudospin [29].…”

Section: Summary and Final Remarksmentioning

confidence: 99%

“…If the layer degree of freedom is considered as a pseudospin, an external potential difference between the two layers creates a pseudospin polarization, which corresponds to the charge transfer between the two layers and the polarization direction is along the normal to the graphene plane. It seems promising to develop bilayer graphene "pseudospintronics" by utilizing the layer pseudospin [29]. In this context, the BLGs with specific electronic properties can be required.…”

Section: Introductionmentioning

confidence: 99%

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Chiral properties of graphene h-BN hybrid systems

Molenda

Zasada

Maślanka

2019

Physica E: Low-dimensional Systems and Nanostructures

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The application of the chiral decomposition procedure to hybrid graphene h-BN systems revealed rules for the partition of the system into effective subsystems being bilayers plus monolayer in case the number of layers is odd. Three types of subsystems have been detected namely purely graphene bilayers and monolayers, mixed bilayers and pure h-BN monolayers depending on the hybrid composition. The effective parameters characterizing these chiral subsystems consist of the interlayer couplings and on-site potentials which shows the mechanism of compensation of the asymmetry introduced into the system by h-BN layers. For illustration, we provide a pedagogical overview about chiral tunneling in graphene subsystems (MLG, BLG) present in hybrid with one h-BN layer. We have established the parameter ranges for which the characteristic features in the spectrum are observed, such as Fabry-Pérot resonances in the case of MLG and magic angles in the case of effective BLG. We also consider different hybrid stacking in order to indicate effective systems with the desired properties required in the electronic and spintronic applica-

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Section: Summary and Final Remarksmentioning

confidence: 99%

Section: Summary and Final Remarksmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chiral properties of graphene h-BN hybrid systems

Molenda

Zasada

Maślanka

2019

Physica E: Low-dimensional Systems and Nanostructures

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“…E.g. Chan [26] and coauthors studied the possible layer polarization pump in a BLG system, and they regarded the graphene layer as one pseudospin degree of freedom in order to obtain the pseudospin polarized pumping currents by a perpendicular time-dependent electric field.…”

Section: Introductionmentioning

confidence: 99%

Possible quantized charge pump in bilayer and trilayer graphene

Wang

Liu

2020

New J. Phys.

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We report a theoretic study of the two-parameter adiabatic charge pump based on the bilayer and trilayer graphene systems. The two perpendicular time-dependent electric fields with a phase lag between them are taken as the pumping potentials, which induce an instant energy gap in each pumping region. Based on both a continuum model and a lattice model, we show that the pumping results from the bilayer and trilayer graphene systems are very different when the Fermi energy happens to reside in the opened energy gap: there is no pumping current for the bilayer system whereas a quantized charge pumping effect emerges in the trilayer-graphene based pump device. This difference can be accounted for by the different Berry phases of Dirac electrons in the two systems. Our findings may shed a light on developing a quantized charge pumping device.

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Quantum pumping of layer pseudospin current in biased bilayer graphene

Cited by 2 publications

References 26 publications

Chiral properties of graphene h-BN hybrid systems

Chiral properties of graphene h-BN hybrid systems

Possible quantized charge pump in bilayer and trilayer graphene

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