Orthorhombic carbon oC24: A novel topological nodal line semimetal

Li, Zhenzhen; Chen, Jia; Nie, Simin; Xu, Liangxiong; Mizuseki, Hiroshi; Weng, Hongming; Wang, Jian-Tao

doi:10.1016/j.carbon.2018.03.003

Cited by 54 publications

(32 citation statements)

References 57 publications

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“…Electronic band calculations revealed that ign-C 6 is a topological node-line semimetal with two mirrorinversion symmetric nodal lines that go through the whole BZ in bulk and a projected surface flat band around the Fermi level. Similar electronic property was also found in orthorhombic oC 24 [65] and monoclinic mC 16 [66]. Here we introduce two typical carbon network structures, a simple orthorhombic C 12 [67] which has two mirror-inversion symmetric nodal lines as well as ign-C 6 and a body-centered tetragonal C 40 [68] which has two mirror-inversion symmetric nodal nets consisting of multiple nodal lines in its bulk BZ.…”

Section: Nodal Lines In Sp 2 -Sp 3 Hybrid 3d Carbon Network Structuressupporting

confidence: 61%

“…These materials have attracted great interest in recent years for their fundamental significance and potential device applications. In this paper, we review the topological semimetals found in 3D graphene network structures [58][59][60][61][62][63][64][65][66][67][68]. According to the classification of topological nodal-line semimetals suggested by Hyart et al [69], topological semimetals in 3D graphene networks can be divided into two types: type A has closed nodal rings in the Brillouin zone (BZ), while type B has continuous nodal lines that traverse the whole BZ to be periodically connected.…”

Section: Introductionmentioning

confidence: 99%

“…According to the classification of topological nodal-line semimetals suggested by Hyart et al [69], topological semimetals in 3D graphene networks can be divided into two types: type A has closed nodal rings in the Brillouin zone (BZ), while type B has continuous nodal lines that traverse the whole BZ to be periodically connected. The topological semimetals with nodal rings have been found in all-sp 2 carbon network structures such as Mackay-Terrones carbon crystal [59], body-centered orthorhombic C 16 [62], and body-centered tetragonal C 16 [64]; meanwhile, the topological semimetals with nodal lines have been found in sp 2 -sp 3 hybrid network structures such as interpenetrated graphene network C 6 [60], orthorhombic C 24 [65], monoclinic mC 16 [66], simple orthorhombic C 12 [67], and body-centered tetragonal C 40 [68]. These topological nodal lines or nodal rings are protected by the coexistence of time reversal and spatial inversion symmetry in bulk and form drumhead-like surface flat bands either inside or outside of the nodal lines when the nodal lines are projected onto certain surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Topological nodal line semimetals in graphene network structures

Wang

Weng

Chen

2019

Advances in Physics: X

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Topological semimetals are a fascinating class of quantum materials that possess extraordinary electronic and transport properties. These materials have attracted great interests in recent years for their fundamental significance and potential device applications. There have been intensive studies suggested that three-dimensional graphene networks support topological semimetals with two types of continuous nodal lines: one is to form closed nodal rings in Brillouin zone and the other ones traversing the whole Brillouin zone to be periodically connected. Carbon has negligible spin-orbit coupling, non-magnetism and great diversity of allotropes, which makes it very promising in realizing topological nodal line semimetals. Here we review recent efforts in proposing various carbon allotropes to realize these two types of nodal line semimetals. The nodal rings or lines are protected by the coexistence of time reversal and spatial inversion symmetries. When projecting these nodal lines or rings onto the certain surface, drumhead like surface flat bands will appear. Based on these flat bands, Chern insulator and high-temperature superconductor will be induced by electron-electron correlation effects. The recent discoveries of Mott insulator and superconductor in twisted bilayer graphenerelated with flat bands have made these reviewed efforts very important and meaningful.

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Section: Nodal Lines In Sp 2 -Sp 3 Hybrid 3d Carbon Network Structuressupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Topological nodal line semimetals in graphene network structures

Wang

Weng

Chen

2019

Advances in Physics: X

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“…Graphite is also a conductor. Carbon allotropes consisting of sp - sp 2 or sp 2 - sp 3 hybrids can easily exhibit excellent physical properties, such as Dirac cones [21,22,23,24,25,26]. Diamondyne is also referred to as Y carbon [27] and 1-diamondyne [28], it inserts two carbon atoms between every two carbon atoms in the diamond structure.…”

Section: Introductionmentioning

confidence: 99%

Electronic, Mechanical and Elastic Anisotropy Properties of X-Diamondyne (X = Si, Ge)

et al. 2019

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The three-dimensional (3D) diamond-like semiconductor materials Si-diamondyne and Ge-diamondyne (also called SiC4 and GeC4) are studied utilizing density functional theory in this work, where the structural, elastic, electronic and mechanical anisotropy properties along with the minimum thermal conductivity are considered. SiC4 and GeC4 are semiconductor materials with direct band gaps and wide band gaps of 5.02 and 5.60 eV, respectively. The Debye temperatures of diamondyne, Si- and Ge-diamondyne are 422, 385 and 242 K, respectively, utilizing the empirical formula of the elastic modulus. Among these, Si-diamondyne has the largest mechanical anisotropy in the shear modulus and Young’s modulus, and Diamond has the smallest mechanical anisotropy in the Young’s modulus and shear modulus. The mechanical anisotropy in the Young’s modulus and shear modulus of Si-diamondyne is more than three times that of diamond as determined by the characterization of the ratio of the maximum value to the minimum value. The minimum thermal conductivity values of Si- and Ge-diamondyne are 0.727 and 0.524 W cm−1 K−1, respectively, and thus, Si- and Ge-diamondyne may be used in the thermoelectric industry.

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“…The reason for the interest in these metamaterials and metasurfaces is the vast variety of applications, such as guiding, shaping, and focusing of light beams, the development of ultrathin highly efficient polarizing elements and many more . Recently, orthorhombic carbon phase structures were theoretically predicted, with enhanced optical and structural properties . Carbon allotropes and carbon hybrid materials with embedded metal structures, have been proven to be a beneficial building‐block in opto‐electronic applications .…”

mentioning

confidence: 99%

Investigating the Optical Properties of a Laser Induced 3D Self‐Assembled Carbon–Metal Hybrid Structure

Butt

Lesina

Neugebauer

et al. 2019

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In the last decade, nano-optics has emerged as a scientific field, pushing the boundaries of science. [1] A very important subcategory of this field is the study and fabrication of various 2D and 3D artificial materials, based on layers of structured dielectrics and metals. [2] The reason for the interest in these metamaterials and metasurfaces is the vast variety of applications, such as guiding, shaping, and focusing of light beams, the development of ultrathin highly efficient polarizing elements and many more. [3] Recently, orthorhombic carbon phase structures were theoretically predicted, with enhanced optical and structural properties. [4][5][6][7] Carbon allotropes and carbon hybrid materials with embedded metal structures, have been proven to be a beneficial building-block in opto-electronicCarbon-based and carbon-metal hybrid materials hold great potential for applications in optics and electronics. Here, a novel material made of carbon and gold-silver nanoparticles is discussed, fabricated using a laser-induced self-assembly process. This self-assembled metamaterial manifests itself in the form of cuboids with lateral dimensions on the order of several micrometers and a height of tens to hundreds of nanometers. The carbon atoms are arranged following an orthorhombic unit cell, with alloy nanoparticles intercalated in the crystalline carbon matrix. The optical properties of this metamaterial are analyzed experimentally using a microscopic Müller matrix measurement approach and reveal a high linear birefringence across the visible spectral range. Theoretical modeling based on local-field theory applied to the carbon matrix links the birefringence to the orthorhombic unit cell, while finite-difference time-domain simulations of the metamaterial relates the observed optical response to the distribution of the alloy nanoparticles and the optical density of the carbon matrix. Orthorhombic Carbon@Au-AgThe ORCID identification number(s) for the author(s) of this article can be found under https://doi.

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Orthorhombic carbon oC24: A novel topological nodal line semimetal

Cited by 54 publications

References 57 publications

Topological nodal line semimetals in graphene network structures

Topological nodal line semimetals in graphene network structures

Electronic, Mechanical and Elastic Anisotropy Properties of X-Diamondyne (X = Si, Ge)

Investigating the Optical Properties of a Laser Induced 3D Self‐Assembled Carbon–Metal Hybrid Structure

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