☆ 4.8 Article

Crossed Andreev reflection in a graphene bipolar transistor

PHYSICAL REVIEW LETTERS (2008)

期刊

PHYSICAL REVIEW LETTERS

卷 100, 期 14, 页码 -

出版社

AMER PHYSICAL SOC

DOI: 10.1103/PhysRevLett.100.147001

关键词

-

类别

Physics, Multidisciplinary

向作者/读者索取更多资源

Protocol

Reagent

摘要

We investigate the crossed Andreev reflections between two graphene leads connected by a narrow superconductor. When the leads are, respectively, of the n and p type, we find that electron elastic cotunneling and local Andreev reflection are both eliminated even in the absence of any valley-isospin or spin polarizations. We further predict oscillations of both diagonal and cross conductances as a function of the distance between the graphene-superconductor interfaces.

作者

我是这篇论文的作者

点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8

评分不足

次要评分

新颖性

-

重要性

-

科学严谨性

-

评价这篇论文

推荐

Article Materials Science, Multidisciplinary

Perfect crossed Andreev reflection in the proximitized graphene/superconductor/ proximitized graphene junctions

Shu-Chang Zhao, Lu Gao, Qiang Cheng, Qing-Feng Sun

Summary: This study investigates the crossed Andreev reflection and nonlocal transport in proximitized graphene/superconductor/proximitized graphene junctions with pseudospin staggered potential and intrinsic spin-orbit coupling. When the intrinsic spin-orbit couplings in the left and right graphene have opposite signs, the crossed Andreev reflection, coexisting with the local Andreev reflection and elastic cotunneling, can be completely eliminated for electrons with specific spin-valley indices. A perfect crossed Andreev reflection with a probability of 100% is achieved in the space of incident angle and electron energy. The crossed conductance and its dependence on superconductor length are also investigated. The energy ranges for the crossed Andreev reflection, without the local Andreev reflection and elastic cotunneling, are clarified for different magnitudes of the pseudospin potential and spin-orbit coupling. The spin-valley index of electrons responsible for the perfect crossed Andreev reflection can be controlled by changing the sign of the intrinsic spin-orbit coupling or applying different biases to the left and right graphene. These results are useful for designing flexible and highly efficient Cooper pair splitters based on spin-valley degree of freedom.

PHYSICAL REVIEW B (2023)

添加到收藏夹

Article Physics, Multidisciplinary

Electrically Controlled Crossed Andreev Reflection in Two-Dimensional Antiferromagnets

Martin F. Jakobsen, Arne Brataas, Alireza Qaiumzadeh

Summary: This study presents a novel phenomenon of generic and tunable crossed Andreev reflection (CAR) between a superconductor and antiferromagnetic layers, with potential applications in solid-state quantum entanglement. By using gate voltages to control carrier type and density in two-dimensional magnets, a robust signature of perfect CAR can be achieved.

PHYSICAL REVIEW LETTERS (2021)

添加到收藏夹

Article Materials Science, Multidisciplinary

Electrical control of crossed Andreev reflection and spin-valley switch in antiferromagnet/superconductor junctions

Wei-Tao Lu, Qing-Feng Sun

Summary: In this study, subgap transport through AF/S and AF/S/AF junctions controlled by electric field in a buckled honeycomb system was investigated. The spin-valley polarized half-metallic phase and pure crossed Andreev reflection were achieved due to spin-orbit coupling, with the possibility of generating the pure CAR without AR and EC. A spin-valley switch effect could be realized by adjusting the electric field, and the properties of AR and CAR processes strongly depended on the spin-valley polarized states. The device could potentially be used for electrical measurement of the CAR process and spin-valley switch.

PHYSICAL REVIEW B (2021)

添加到收藏夹

Article Materials Science, Multidisciplinary

Pure crossed Andreev reflection assisted transverse valley currents in α - T3 lattices

W. Zeng, R. Shen

Summary: In this study, a method for generating transverse valley currents based on pure crossed Andreev reflection (pCAR) in hybrid junctions is proposed. The experimental results show that this method is highly efficient in charge-valley conversion and has potential applications in valleytronic devices.

PHYSICAL REVIEW B (2022)

添加到收藏夹

Article Materials Science, Multidisciplinary

Non-local Andreev reflection through Andreev molecular states in graphene Josephson junctions

Eduard Zsurka, Noel Plaszko, Peter Rakyta, Andor Kormanyos

Summary: We propose a device composed of two vertically stacked monolayer graphene Josephson junctions for Cooper pair splitting. The hybridization of Andreev bound states in the two Josephson junctions facilitates non-local transport in this normal-superconductor hybrid structure, as studied through the calculation of non-local differential conductance. Our setup offers the advantage of not requiring precise control over junction length, doping, or superconducting phase difference, making it potentially easier for experimental realization.

2D MATERIALS (2023)

添加到收藏夹

Article Materials Science, Multidisciplinary

Spin-orbit coupling assisted magnetoanisotropic Josephson effect in ferromagnetic graphene Josephson junctions

Chuanshuai Huang, Yajun Wei, Yongchun Tao, Jun Wang

Summary: The study shows that by controlling the orientation of the exchange field, a 0-π transition can be achieved in graphene-based superconductor-ferromagnet-R-superconductor structures, while varying the RSOC strength λ does not directly affect this transition, but it is a necessary condition for the transition induced by changing the orientation.

PHYSICAL REVIEW B (2021)

添加到收藏夹

Article Physics, Applied

Crossed Andreev reflection in FSF Weyl semimetal junctions

Alireza Azizi, Babak Abdollahipour

Summary: We investigated crossed Andreev reflection in a ferromagnet-superconductor-ferromagnet junction based on time-reversal invariant Weyl semimetals. We demonstrate that this junction can provide a suitable platform for generating pure crossed Andreev reflection signals, and the signals can be controlled by tuning the chemical potentials and magnetizations. These findings are important for generating entangled electron pairs in condensed matter systems.

JOURNAL OF PHYSICS D-APPLIED PHYSICS (2022)

添加到收藏夹

Article Materials Science, Multidisciplinary

Electrical and thermal transport in a twisted heterostructure of transition metal dichalcogenide and CrI3 connected to a superconductor

Leyla Majidi, Reza Asgari

Summary: This study investigates the influence of twist angle and gate electric field on electric and thermal transport in TMDC/CrI3 structures. The spin-splitting of band structures due to spin-orbit interaction can be controlled, leading to significant effects. The property of Andreev reflection process highly depends on the spin valley polarized states due to spin-orbit coupling.

PHYSICAL REVIEW B (2022)

添加到收藏夹

Article Chemistry, Multidisciplinary

Noncontact Andreev Reflection as a Direct Probe of Superconductivity on the Atomic Scale

Wonhee Ko, Jose L. Lado, Petro Maksymovych

Summary: Researchers present a new method to probe Andreev reflection in tunnel junctions, using tunneling spectroscopy and junction tunability for quantitative detection of superconductivity. This method allows for unambiguous identification of the origin of superconducting excitations and the detection of higher order Andreev processes in atomic-scale junctions.

NANO LETTERS (2022)

添加到收藏夹

Article Materials Science, Multidisciplinary

Effects of discrete topology on quantum transport across a graphene n-p-n junction: A quantum gravity analog

Naveed Ahmad Shah, Alonso Contreras-Astorga, Francois Fillion-Gourdeau, M. A. H. Ahsan, Steve MacLean, Mir Faizal

Summary: In this Letter, the effect of next-to-nearest atom hopping on Klein tunneling in graphene is investigated. An effective quantum dynamics equation is obtained based on an emergent generalized Dirac structure by analyzing the tight-binding model beyond the linear regime. It is shown that this structure has some interesting theoretical properties, which can simplify quantum transport calculations and is not chirally symmetric as previously suggested. Furthermore, it is reminiscent of theories on a space with a discrete topology. Exploiting these properties, the authors demonstrate that the discrete topology of the crystal lattice affects Klein tunneling, which can be experimentally probed by measuring the transmittance through n-p-n junctions. They argue that this can simulate some quantum gravity models using graphene and propose an experiment to perform such measurements.

PHYSICAL REVIEW B (2022)

添加到收藏夹

Article Physics, Multidisciplinary

Strain-modulated anisotropic Andreev reflection in a graphene-based superconducting junction

Xingfei Zhou, Ziming Xu, Deliang Cao, Fenghua Qi

Summary: This study investigates the Andreev reflection across a uniaxial strained graphene-based superconducting junction. Compared to the pristine junction, three opposite properties are found: Andreev retro-reflection in the interband conversion regime, specular Andreev reflection in the intraband conversion regime, and perfect Andreev reflection with unit efficiency at a nonzero incident angle of electron. These exotic properties arise from the strain-induced anisotropic band structure of graphene, breaking the original relation between particle velocity direction and corresponding wavevector direction.

CHINESE PHYSICS B (2022)

添加到收藏夹

Article Physics, Multidisciplinary

Majorana bound states in a driven quantum dot

Fabian Medina-Cuy, Dunkan Martinez, Francisco Dominguez-Adame, P. A. Orellana

Summary: We investigate periodically driven quantum dots in two different setups - one coupled to a topological superconductor and a normal metal lead, and the other connected to two topological superconductors and side-coupled to a normal metal lead. Using non-equilibrium Green's function techniques and Floquet formalism, we obtain the quasienergy spectra as a function of amplitude, frequency, and superconducting phase difference. Our results show unique electronic responses, such as broken particle-hole symmetry resulting from the non-locality of Majorana bound states. We also calculate time-averaged current and differential conductance to experimentally detect these spectral signatures in the proposed configurations.

EUROPEAN PHYSICAL JOURNAL PLUS (2023)

添加到收藏夹

Article Materials Science, Multidisciplinary

Geometrical effects on the downstream conductance in quantum-Hall-superconductor hybrid systems

A. David, J. S. Meyer, M. Houzet

Summary: In this study, we investigate the transport properties of chiral Andreev edge states (CAES) in a quantum Hall-superconductor junction. We find that these properties strongly depend on the contact geometry and filling factor, and local barriers need to be added at the corners of the junction to reproduce such properties when using one-dimensional effective models.

PHYSICAL REVIEW B (2023)

添加到收藏夹

Article Physics, Applied

Tunable spin-valley polarized transport channel in silicene-based superconducting hybrid structures

Ya-Jun Wei, Y. C. Tao

Summary: The influence of spin-valley polarized transport channel (SVPTC) mismatch in a silicene-based ferromagnet/ferromagnet/superconductor junction and the barrier strength in a ferromagnet/insulator/ferromagnet/superconductor junction were investigated. It was found that the mismatch in SVPTC can be modulated by electric and exchange fields, while the phase shift of conductance oscillation is created by changing the electric field in the former structure and by altering the barrier strength in the latter structure.

JOURNAL OF APPLIED PHYSICS (2021)

添加到收藏夹

Article Physics, Condensed Matter

Quantum magnetotransport oscillations in graphene nanoribbons coupled to superconductors

Y. Takagaki

Summary: The study reveals that the oscillations in magnetic field regimes of zigzag and armchair graphene nanoribbons in contact with superconductors become irregular and/or suppressed as the coupling strength increases. These oscillations differ from those of a nonrelativistic two-dimensional electron gas and are attributed to the phase shift at the graphene-superconductor interface. Additionally, the presence of a magnetic field suppresses the quantum blocking of Andreev transmission in zigzag nanoribbons, regardless of the type of reflection involved.

JOURNAL OF PHYSICS-CONDENSED MATTER (2021)

添加到收藏夹

Article Physics, Multidisciplinary

Andreev spectrum of a Josephson junction with spin-split superconductors

B. Bujnowski, D. Bercioux, F. Konschelle, J. Cayssol, F. S. Bergeret

EPL (2016)

添加到收藏夹

Article Materials Science, Multidisciplinary

Probing the helical edge states of a topological insulator by Cooper-pair injection

P. Adroguer, C. Grenier, D. Carpentier, J. Cayssol, P. Degiovanni, E. Orignac

PHYSICAL REVIEW B (2010)

添加到收藏夹

Article Materials Science, Multidisciplinary

Interfacial charge and spin transport in Z2 topological insulators

Ai Yamakage, Ken-Ichiro Imura, Jerome Cayssol, Yoshio Kuramoto

PHYSICAL REVIEW B (2011)

添加到收藏夹

Article Materials Science, Multidisciplinary

Spin Hall effect at interfaces between HgTe/CdTe quantum wells and metals

M. Guigou, P. Recher, J. Cayssol, B. Trauzettel

PHYSICAL REVIEW B (2011)

添加到收藏夹

Article Materials Science, Multidisciplinary

Persistent currents in Dirac fermion rings

Doru Sticlet, Balazs Dora, Jerome Cayssol

PHYSICAL REVIEW B (2013)

添加到收藏夹

Article Materials Science, Multidisciplinary

From fractionally charged solitons to Majorana bound states in a one-dimensional interacting model

Doru Sticlet, Luis Seabra, Frank Pollmann, Jerome Cayssol

PHYSICAL REVIEW B (2014)

添加到收藏夹

Article Materials Science, Multidisciplinary

Dynamical response of dissipative helical edge states

Doru Sticlet, Jerome Cayssol

PHYSICAL REVIEW B (2014)

添加到收藏夹

Article Physics, Multidisciplinary

Nonequilibrium Transport Through a Gate-Controlled Barrier on the Quantum Spin Hall Edge

Roni Ilan, Jerome Cayssol, Jens H. Bardarson, Joel E. Moore

PHYSICAL REVIEW LETTERS (2012)

添加到收藏夹

Article Physics, Multidisciplinary

Fractional Topological Phases and Broken Time-Reversal Symmetry in Strained Graphene

Pouyan Ghaemi, Jerome Cayssol, D. N. Sheng, Ashvin Vishwanath

PHYSICAL REVIEW LETTERS (2012)

添加到收藏夹

Article Physics, Multidisciplinary

Optically Engineering the Topological Properties of a Spin Hall Insulator

Balazs Dora, Jerome Cayssol, Ferenc Simon, Roderich Moessner

PHYSICAL REVIEW LETTERS (2012)

添加到收藏夹

Article Physics, Multidisciplinary

Quasiballistic Transport of Dirac Fermions in a Bi2Se3 Nanowire

J. Dufouleur, L. Veyrat, A. Teichgraeber, S. Neuhaus, C. Nowka, S. Hampel, J. Cayssol, J. Schumann, B. Eichler, O. G. Schmidt, B. Buechner, R. Giraud

PHYSICAL REVIEW LETTERS (2013)

添加到收藏夹

Article Materials Science, Multidisciplinary

Interplay between superconductivity and spin-dependent fields in nanowire-based systems

J. Baumard, J. Cayssol, A. Buzdin, F. S. Bergeret

PHYSICAL REVIEW B (2020)

添加到收藏夹

Article Materials Science, Multidisciplinary

Photocurrent and photoconductance of a helical edge state

Jonathan Atteia, Jerome Cayssol

PHYSICAL REVIEW B (2019)

添加到收藏夹

Article Materials Science, Multidisciplinary

Generation of a superconducting vortex via Neel skyrmions

J. Baumard, J. Cayssol, F. S. Bergeret, A. Buzdin

PHYSICAL REVIEW B (2019)

添加到收藏夹

Article Materials Science, Multidisciplinary

Ballistic transport through irradiated graphene

Jonathan Atteia, Jens H. Bardarson, Jerome Cayssol

PHYSICAL REVIEW B (2017)

添加到收藏夹

暂无数据

© Peeref 2019-2024. All rights reserved.