Induced Magnetic Ordering by Proton Irradiation in Graphite

Esquinazi, P.; Spemann, D.; Höhne, R.; Setzer, A.; Han, K.‐H.; Butz, T.

doi:10.1103/physrevlett.91.227201

Cited by 801 publications

(651 citation statements)

References 21 publications

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“…For example, magnetism has experimentally been reported both in nanographene [58,59,60], and in graphite in the presence of disorder [61] or grain boundaries [62], although pristine graphene has not been found to be either magnetic [63] or gapped [64,20]. Theoretically, on-site Coulomb repulsion exceeding U > 3.9t has been found to give an antiferromagnetic state in undoped graphene in quantum Monte Carlo simulations [15,17].…”

Section: Electron Interactions In Graphenementioning

confidence: 99%

Chirald-wave superconductivity in doped graphene

Black‐Schaffer

Honerkamp

2014

J. Phys.: Condens. Matter

170

176

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Abstract. A highly unconventional superconducting state with a spin-singlet d x 2 −y 2 ± id xy -wave, or chiral d-wave, symmetry has recently been proposed to emerge from electron-electron interactions in doped graphene. Especially graphene doped to the van Hove singularity at 1/4 doping, where the density of states diverges, has been argued to likely be a chiral d-wave superconductor. In this review we summarize the currently mounting theoretical evidence for the existence of a chiral d-wave superconducting state in graphene, obtained with methods ranging from mean-field studies of effective Hamiltonians to angle-resolved renormalization group calculations. We further discuss multiple distinctive properties of the chiral d-wave superconducting state in graphene, as well as its stability in the presence of disorder. We also review means of enhancing the chiral d-wave state using proximity-induced superconductivity. The appearance of chiral d-wave superconductivity is intimately linked to the hexagonal crystal lattice and we also offer a brief overview of other materials which have also been proposed to be chiral d-wave superconductors.

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Section: Electron Interactions In Graphenementioning

confidence: 99%

Chirald-wave superconductivity in doped graphene

Black‐Schaffer

Honerkamp

2014

J. Phys.: Condens. Matter

170

176

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“…Ion irradiation can be used to introduce structural defects in graphene and other carbon allotropes 16 , and provides a versatile tool for manipulating their physical properties 7,[17][18][19][20][21][22] For this purpose, proton irradiation, in particular, attracts much interest due to the observed irradiation-induced magnetism in graphite and graphene [23][24][25][26][27][28][29] , which was attributed to defects, e.g., vacancies and H species 24 . However, an atomic-resolved determination, e.g.…”

mentioning

confidence: 99%

“…It is still unclear whether defects can be generated at a higher proton energy. Moreover, to mimic proton irradiation in various experiments 23,28,29 where fast H + ions with kinetic energy ranging from a few hundred keV to a few MeV were used, it would be very valuable to extend the simulations to that energy range and also explore the effect of the charge state of the projectile.…”

mentioning

confidence: 99%

Simulation of high-energy ion collisions with graphene fragments

et al. 2012

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The collision of energetic ions and graphene fragments is studied in the framework of real-space finite-difference time-dependent density functional theory (TDDFT) coupled with classical molecular dynamics for nuclei. The amount of energy transferred from the projectile to the target is calculated to explore the defect formation mechanisms as a function of the projectile's energy. It is found that creation of defects in graphene due to the interaction of a fast proton with valence electrons is unlikely. In the case of projectiles with higher charges the transferred energy increases significantly, leading to higher probability of bond breaking.

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“…The existence of π-electron magnetism in pure carbon has now been widely accepted (see e.g. [40,41]). On the theoretical side, it is well known that magnetic instabilities exist at specific graphene edges [42,43,44,45], in defective graphene [46] and nanotubes [47].…”

Section: Introductionmentioning

confidence: 99%

Carbon sp chains in graphene nanoholes

Castelli¹,

Ferri²,

Onida³

et al. 2012

J. Phys.: Condens. Matter

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Abstract. Nowadays sp carbon chains terminated by graphene or graphitic-like carbon are synthesized routinely in several nanotech labs. We propose an ab-initio study of such carbon-only materials, by computing their structure and stability, as well as their electronic, vibrational and magnetic properties. We adopt a fair compromise of microscopic realism with a certain level of idealization in the model configurations, and predict a number of properties susceptible to comparison with experiment.

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Induced Magnetic Ordering by Proton Irradiation in Graphite

Cited by 801 publications

References 21 publications

Chirald-wave superconductivity in doped graphene

Chirald-wave superconductivity in doped graphene

Simulation of high-energy ion collisions with graphene fragments

Carbon sp chains in graphene nanoholes

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