Radiation-induced resistance oscillations in a 2D hole gas: a demonstration of a universal effect

Iñarrea, Jesús; Platero, Gloria

doi:10.1088/0953-8984/27/41/415801

Cited by 12 publications

(20 citation statements)

References 47 publications

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“…5. Accordingly, the time dependent Hamiltonian can be exactly solved 21,22,34,53 allowing a solution for the massive Dirac fermion wave function (for the K valley):…”

Section: Theoretical Modelmentioning

confidence: 99%

Photovoltage Oscillations in Encapsulated Graphene

Iñarrea

Platero

2022

Preprint

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We theoretically analyze the rise of photovoltage oscillations in hexagonal boron-nitride (h-BN) encapsulated monolayer graphene (h-BN/graphene/h-BN) when irradiated with terahertz radiation. We use an extension of the radiation-driven electron orbit model, successfully applied to study the oscillations obtained in irradiated magnetotransport of GaAs/AlGaAs heterostructures. The extension takes mainly into account that now the carriers are massive Dirac fermions. Our simulations reveal that the photovoltage in these graphene systems presents important oscillations similar to the ones of irradiated magnetoresistance in semiconductor platforms but in the terahertz range. We also obtain that these oscillations are clearly affected by the voltages applied to the sandwiched graphene: a vertical gate voltage between the two hBN layers and an external positive voltage applied to one of the sample sides. The former steers the carrier effective mass and the latter the photovoltage intensity and the oscillations amplitude. The frequency dependence of the photo-oscillations is also investigated.

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“…5. Accordingly, the time dependent Hamiltonian can be exactly solved 21,22,34,53 allowing a solution for the massive Dirac fermion wave function (for the K valley):…”

Section: Theoretical Modelmentioning

confidence: 99%

Photovoltage Oscillations in Encapsulated Graphene

Iñarrea

Platero

2022

Preprint

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“…When ∆X increases, we obtain MIRO's peaks in irradiated R xx , and when it lowers we obtain MIRO's valleys. The final expression for the irradiated ∆X is given by 37,65 :…”

Section: Theoretical Modelmentioning

confidence: 99%

Radiation-induced magnetoresistance oscillations with massive Dirac fermions

Inarrea,

Platero

2021

Preprint

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We report on a theoretical study on the rise of radiation-induced magnetoresistance oscillations in two-dimensional systems of massive Dirac fermions. We study the bilayer system of monolayer graphene and hexagonal boron nitride (h-BN/graphene) and the trilayer system of hexagonal boron nitride encapsulated graphene (h-BN/graphene/h-BN). We extend the radiation-driven electron orbit model that was previously devised to study the same oscillations in two-dimensional systems of Schrödinger electrons (GaAs/AlGaAS heterostructure) to the case of massive Dirac fermions.In the simulations we obtain clear oscillations for radiation frequencies in the terahertz and farinfrared bands. We investigate also the power and temperatures dependence. For the former we obtain similar results as for Schrödinger electrons and predict the rise of zero resistance states. For the latter we obtain a similar qualitatively dependence but quantitatively different when increasing temperature. While in GaAs the oscillations are wiped out in a few degrees, interestingly enough, for massive Dirac fermions, we obtain observable oscillations for temperatures above 100 K and even at room temperature for the higher frequencies used in the simulations.

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“…For the flight time τ it was previously proposed, in a quantum mechanical and semiclassical approach 53 , 54 , that during the scattering jump from one driven orbit to another (in a time τ ) electrons in their orbits would complete, on average, one full loop, which implies that . On the other hand, another way to obtain the expression of τ is to compare the condition fulfilled by the minima positions obtained from the theoretical expression (Eq.…”

Section: Theoretical Modelmentioning

confidence: 99%

Radiation-induced resistance oscillations in 2D electron systems with strong Rashba coupling

Iñarrea

2017

Sci Rep

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We present a theoretical study on the effect of radiation on the mangetoresistance of two-dimensional electron systems with strong Rashba spint-orbit coupling. We want to study the interplay between two well-known effects in these electron systems: the radiation-induced resistance oscillations and the typical beating pattern of systems with intense Rashba interaction. We analytically derive an exact solution for the electron wave function corresponding to a total Hamiltonian with Rashba and radiation terms. We consider a perturbation treatment for elastic scattering due to charged impurities to finally obtain the magnetoresistance of the system. Without radiation we recover a beating pattern in the amplitude of the Shubnikov de Hass oscillations: a set of nodes and antinodes in the magnetoresistance. In the presence of radiation this beating pattern is strongly modified following the profile of radiation-induced magnetoresistance oscillations. We study their dependence on intensity and frequency of radiation, including the teraherzt regime. The obtained results could be of interest for magnetotransport of nonideal Dirac fermions in 3D topological insulators subjected to radiation.

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Radiation-induced resistance oscillations in a 2D hole gas: a demonstration of a universal effect

Cited by 12 publications

References 47 publications

Photovoltage Oscillations in Encapsulated Graphene

Photovoltage Oscillations in Encapsulated Graphene

Radiation-induced magnetoresistance oscillations with massive Dirac fermions

Radiation-induced resistance oscillations in 2D electron systems with strong Rashba coupling

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