Reexamining the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi></mml:math>decay of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mrow><mml:mn>53</mml:mn><mml:mo>,</mml:mo><mml:mn>54</mml:mn></mml:mrow></mml:msup></mml:math>Ni,<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mrow><mml:mn>52</mml:mn><mml:mo>,</mml:mo><mml:mn>53</mml:mn></mml:mrow></mml:msup></m

Su, Jun; Liu, W. P.; Shu, Nengchuan; Yan, S. Q.; Li, Z. H.; Guo, Bin; Huang, W. Z.; Zeng, Sheng; Li, E. T.; Jin, S. J.; Liu, X.; Wang, Y. B.; Liu, Gang; Li, Y. J.; Chen, Y. S.; Bai, X. X.; Wang, J. S.; Yang, Y. Y.; Chen, R. F.; Xu, Shiwei; Hu, J.; Chen, S. Z.; B., S.; Han, J. L.; Ma, P.; B., J.; Cao, X. G.; Jin, S.; Bai, Zhiyong; Yang, K.S.; Zhang, W.; Chen, Z.; Liu, L. X.; Lin, Qiang; Yan, Xiaosong; Zhang, X. H.; Fu, Fang; He, J. J.; Li, X. Q.; He, C. Y.; Smith, M. S.

doi:10.1103/physrevc.87.024312

Cited by 15 publications

(4 citation statements)

References 23 publications

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“…And it can be realized in compressively strained BP under a periodic field of a circularly polarized laser to provide us new type of Fermion quasiparticles. We notice that such a new type of Dirac-cone (type-III) in the SW40 is intrinsic and it had been reported in previously proposed OPG-Z 33 . Given its excellent stability exceeding than OPG-Z (348 meV/atom), SW40 (133 meV/atom) is highly expected to be an experimental target with intrinsic type-III Dirac-cone for realizing such new Fermion quasiparticles.…”

supporting

confidence: 77%

“…It is reported that the anisotropic band dispersions can be induced in graphene through external Periodic Potentials 42,43 or elemental doping 45 . In fact, intrinsic anisotropic Dirac-cones can be realized through graphene allotropes 23,32,33 and graphyne allotropes 31,41,46,47 , such as OPG-Z 33 , phagraphene 32 and SW-graphene 23 . However, the anisotropies of the Diraccones are usually not very strong.…”

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confidence: 99%

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Theoretical prediction of low-energy Stone-Wales graphene with an intrinsic type-III Dirac cone

Gong

Shi

et al. 2020

Phys. Rev. B

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Based on first-principles method we predict a new low-energy Stone-Wales graphene SW40, which has an orthorhombic lattice with Pbam symmetry and 40 carbon atoms in its crystalline cell forming well-arranged Stone-Wales patterns. The calculated total energy of SW40 is just about 133 meV higher than that of graphene, indicating its excellent stability exceeds all the previously proposed graphene allotropes. We find that SW40 processes intrinsic Type-III Dirac-cone (Phys. Rev. Lett., 120, 237403, 2018) formed by band-crossing of a local linear-band and a local flat-band, which can result in highly anisotropic Fermions in the system. Interestingly, such intrinsic type-III Dirac-cone can be effectively tuned by inner-layer strains and it will be transferred into Type-II and Type-I Dirac-cones under tensile and compressed strains, respectively. Finally, a general tightbinding model was constructed to understand the electronic properties nearby the Fermi-level in SW40. The results show that type-III Dirac-cone feature can be well understood by the π-electron interactions between adjacent Stone-Wales defects. PACS numbers:The experimental synthesizing of two-dimensional (2D) graphene 1-3 and graphdiynes 4,5 opened the door to the 2D carbon-word and have attracted much scientific efforts to reveal their fundamental properties and potential applications 1,6-9 . With excellent mechanical and electronic properties 1,6,7 , graphene is believed as a potential candidate for replacing silicon in future nano-electronics as new building block 10 . To design pure-carbon nano-divice, 2D carbon allotropes can provide us rich electronic properties for different functional requirements. For example, R 57−1 11 , R 57−2 12 , H 567 12 , O 567 12 , ψ-graphene 13,14 , OPG-L 33 , net-τ 15 and other 2D carbon allotropes 16-24 with normal metallic property can be used as electron conductors. The semiconducting octite SC 19 , pza-C10 25 , Θ-graphene 26,27 and γ-graphyne 28,29 are proper candidates 23,30,31 for building diodes and transistors. The graphene 1-3 , phagraphene 32 , OPG-Z 33 and SWgraphene 23 as Dirac-cone semi-metals 23,30,31 with high carrier mobility can be used to construct high-speed nano-device. Especially, the freedom of rotation in graphene bilayer bring us the surprising phenomenon of superconductivity in some magic degrees [34][35][36][37] , which has set off a new round of research upsurge on low-dimensional carbon systems [38][39][40][41] .

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confidence: 77%

mentioning

confidence: 99%

Theoretical prediction of low-energy Stone-Wales graphene with an intrinsic type-III Dirac cone

Gong

Shi

et al. 2020

Phys. Rev. B

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“…Many other hypothetical graphene allotropes have been previously proposed. For example, the pentaheptites (R 57−1 and R 57−2 ) containing exclusively 5-7 rings proposed in 1996 15 and 2000 16,17 , the Haeckelite sheets (H 567 and O 567 ) proposed by Terrones 17 , the low-energy ψ-graphene previously proposed by Csányi 18 and recently investigated by Li 19 , the dimerites (dimerite I, II and III with metallic property) and octites (metallic octite M 1 , M 2 , M 3 and semiconducting octite SC) constructed through defects patterns [20][21][22][23] , the biphenylene sheets (New-W and New-C) containing 4-6-8 rings 24,25 , the T-graphene containing 4-8 rings [26][27][28] , the PO-graphene con-taining 5-8 rings (OPG-L and OPG-Z) 29,30 , the graphene superlattice structures (including pza-C 10 ) 31 , the 187-C 65 , 191-C 63 and 127-C 41 sheets 32 , the 5-6-8 rings HOP-graphene 33 , δ-graphene 34 and pentahexoctite 35 , as well as the recently proposed phagraphene 36 . Most of these 2D carbon allotropes are more energetically stable than the experimentally viable graphynes 2,14 and C 60 4 .…”

Section: Pacs Numbersmentioning

confidence: 99%

Stone-Wales graphene: A two-dimensional carbon semimetal with magic stability

et al. 2019

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A two-dimensional carbon allotrope, Stone-Wales graphene, is identified in stochastic group and graph constrained searches and systematically investigated by first-principles calculations. Stone-Wales graphene consists of well-arranged Stone-Wales defects, and it can be constructed through a 90 • bond-rotation in a √ 8× √ 8 supercell of graphene. Its calculated energy relative to graphene, +149 meV/atom, makes it more stable than the most competitive previously suggested graphene allotropes We find that Stone-Wales graphene based on a √ 8 supercell is more stable than those based on √ 9 × √ 9, √ 12 × √ 12 and √ 13 × √ 13 super-cells, and is a "magic size" that can be further understood through a simple "energy splitting and inversion" model. The calculated vibrational properties and molecular dynamics of SW-graphene confirm that it is dynamically stable. The electronic structure shows SW-graphene is a semimetal with distorted, strongly anisotropic Dirac cones. PACS numbers:Elemental carbon adopts many different allotropes, including the three-dimensional (3D) cubic diamond, hexagonal diamond and graphite, the two-dimensional (2D) graphene 1 and graphynes 2 , the one-dimensional (1D) nanotubes 3 , as well as the zero-dimensional (0D) fullerenes 4 , due to its ability to hybridize in sp, sp 2 and sp 3 . Low-dimensional carbon materials, such as graphene and nanotubes, have attracted much scientific interest in view of their novel electronic and mechanical properties 1,5,6 . In particular, graphene is a well-known Dirac-cone material that exhibits high carrier mobility 1,5,6 and the quantum Hall effect 5,7,8 due to its semi-metallicity contributed from the active π-electrons 8,9 . The successes of isolating graphene 1,10,11 from graphite have spurred many efforts in searching for other 2D carbon allotropes beyond graphene. Graphynes 12,13 are alternative ways to fill the 2D space with mixed sp-sp 2 carbon atoms. They contribute rich electronic properties, including semiconductors, semi-metals and metals. Although graphynes with sp-hybridized bonding are energetically less stable than the pure sp 2 -hybridized graphene, graphite and nanotubes, there are a few graphynes that have been experimentally synthesized 2,14 .The honeycomb-like graphene is not the only way to topologically fill 2D space with sp 2 hybridized carbon. Many other hypothetical graphene allotropes have been previously proposed. For example, the pentaheptites (R 57−1 and R 57−2 ) containing exclusively 5-7 rings proposed in 1996 15 and 2000 16,17 , the Haeckelite sheets (H 567 and O 567 ) proposed by Terrones 17 , the low-energy ψ-graphene previously proposed by Csányi 18 and recently investigated by Li 19 , the dimerites (dimerite I, II and III with metallic property) and octites (metallic octite M 1 , M 2 , M 3 and semiconducting octite SC) constructed through defects patterns 20-23 , the biphenylene sheets (New-W and New-C) containing 4-6-8 rings 24,25 , the T-graphene containing 4-8 rings 26-28 , the PO-graphene con-taining 5-8 rings (OPG-L and...

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“…To disentangle the different in-medium effects, we start by evaluating the Pauli blocking. Several methods can be employed [32,33]. We use in this study the simple prescription of Kikuchi and Kawai [34] where the probability P to perform a NN collision is given by :…”

Section: In-medium Effectsmentioning

confidence: 99%

In-medium effects for nuclear matter in the Fermi-energy domain

et al. 2014

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We study nuclear stopping in central collisions for heavy-ion induced reactions in the Fermi energy domain, between 15 and 100 A MeV. Using the large dataset of exclusive measurements provided by the 4π array INDRA, we determine the relative degree of stopping as a function of system mass and bombarding energy. We show that the stopping can be directly related to the transport properties in the nuclear medium. By looking specifically at free nucleons (here protons), we present for the first time a comprehensive body of experimental results concerning the mean free path, the nucleonnucleon cross-section and in-medium effects in nuclear matter. It is shown that the mean free path exhibits a maximum at λNN = 9.5 ± 2 fm, around Einc = 35 − 40 A MeV incident energy and decreases toward an asymptotic value λNN = 4.5 ± 1 fm at Einc = 100 A MeV. After accounting for Pauli blocking of elastic nucleon-nucleon collisions, it is shown that the effective in-medium NN cross section is further reduced compared to the free value in this energy range. Therefore, in-medium effects cannot be neglected in the Fermi energy range. These results bring new fundamental inputs for microscopic descriptions of nuclear reactions in the Fermi energy domain.

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Reexamining theβdecay of53,54Ni,52,53

Cited by 15 publications

References 23 publications

Theoretical prediction of low-energy Stone-Wales graphene with an intrinsic type-III Dirac cone

Theoretical prediction of low-energy Stone-Wales graphene with an intrinsic type-III Dirac cone

Stone-Wales graphene: A two-dimensional carbon semimetal with magic stability

In-medium effects for nuclear matter in the Fermi-energy domain

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