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The authors apply first-principles calculations to investigate the interplay between structural, electronic, and magnetic properties of nanostructures composed of narrow nanotubes filled with metallic nanowires. The focus is on the…

Mesoscale and Nanoscale Physics · Physics 2010-09-06 Eduardo M. Diniz , Ricardo W. Nunes , Hélio Chacham , Mário S. C. Mazzoni

The anisotropy of the electronic structure of ternary nanolaminate V2GeC is investigated by bulk-sensitive soft x-ray emission spectroscopy. The measured polarization-dependent emission spectra of V L2,3, C K, Ge M1 and Ge M2,3 in V2GeC are…

Elastic properties of carbon nanotubes and nanoropes are investigated using an empirical force-constant model. For single and multi-wall nanotubes the elastic moduli are shown to be insensitive to details of the structure such as the…

Materials Science · Physics 2009-10-30 J. P. Lu

Boron nitride structures have excellent thermal and chemical stabilities. Based on state-of-art theoretical calculations, we propose a wide gap semiconducting BN crystal with a three-dimensional hyperhoneycomb structure (Hp-BN), which is…

Materials Science · Physics 2017-10-18 Jin Yu , Lihua Qu , Edo van Veen , Mikhail I. Katsnelson , Shengjun Yuan

We study the interfacial structure, stability, and elastic properties of composite carbon films containing nanotubes. Our Monte Carlo simulations show that Van der Waals forces play a vital role in shaping up the interfacial geometry,…

Materials Science · Physics 2009-11-11 M. G. Fyta , P. C. Kelires

A new formula for elastic bending modulus of monolayer graphene is derived analytically from an empirical potential for solid-state carbon-carbon bonds. Two physical origins are identified for the non-vanishing bending modulus of the…

Materials Science · Physics 2015-05-13 Qiang Lu , Marino Arroyo , Rui Huang

Based on the third allotropic form of carbon (Fullerenes) through theoretical study have been predicted structures described as non-classical fullerenes. We have studied novel allotropic carbon structures with a closed cage configuration…

Materials Science · Physics 2017-05-24 Christian A. Celaya , Jesús Muñiz , Luis Enrique Sansores

Both cuprates and iron-based superconductors demonstrate nematicity, defined as the spontaneous breaking of rotational symmetry in electron systems. The nematic state can play a role in the high-transition-temperature superconductivity of…

The group IV-VI compound SnSe, with an orthorhombic lattice structure, has recently attracted particular interest due to its unexpectedly low thermal conductivity and high power factor, showing great promise for thermoelectric applications.…

Materials Science · Physics 2017-01-03 Xiaolong Xu , Qingjun Song , Haifeng Wang , Pan Li , Kun Zhang , Yilun Wang , Kai Yuan , Zichen Yang , Yu Ye , Lun Dai

The atomistic simulations of carbon nanotube (CNT) - carbon reinforced composite material are reported. The studied composite samples were obtained by impregnating certain amounts of CNTs (3,3) and (6,6) into pristine graphite matrix. The…

Materials Science · Physics 2011-03-14 Vitaly Chaban

Carbon, being one of the most versatile elements of the periodic table, forms solids and molecules with often unusual properties. Recently, a novel family of three-dimensional graphitic carbon structures, the so-called hyperhoneycomb…

Mesoscale and Nanoscale Physics · Physics 2016-06-01 Marcos Veríssimo-Alves , Rodrigo G. Amorim , A. S. Martins

Heterointerfaces of cubic boron nitride (cBN) with diamond have garnered significant interest due to their ultra-wide bandgaps and small lattice mismatch ($\sim1.5$\%), offering promising advancements in high-power and high-frequency…

Titanium nitride halides, TiNX (X = F, Cl, Br, I) in the {\alpha}-phase (orthorhombic) are exciting quasi two-dimensional (2D) electronic systems exhibiting a fascinating series of electronic ground states under different conditions.…

Materials Science · Physics 2020-04-22 M. M. Hossain , S. H. Naqib

Nanoscrolls (papyrus-like nanostructures) are very attractive structures for a variety of applications, due to their tunable diameter values and large accessible surface area. They have been successfully synthesized from different…

Materials Science · Physics 2019-06-05 Eric Perim , Douglas S. Galvao

This is a critical review of MAX-phase carbides and nitrides from an electronic-structure and chemical bonding perspective. This large group of nanolaminated materials is of great scientific and technological interest and exhibit a…

Materials Science · Physics 2016-12-15 Martin Magnuson , Maurizio Mattesini

Bulk amorphous materials have been studied extensively and are widely used, yet their atomic arrangement remains an open issue. Although they are generally believed to be Zachariasen continuous random networks, recent experimental evidence…

We investigate far-infrared properties of strain engineered vanadium dioxide nanosheets through epitaxial growth on a (100)R TiO2 substrate. The nanosheets exhibit large uniaxial strain leading to highly uniform and oriented cracks along…

Strongly Correlated Electrons · Physics 2015-03-19 Elsa Abreu , Mengkun Liu , Jiwei Lu , Kevin G. West , Salinporn Kittiwatanakul , Wenjing Yin , Stuart A. Wolf , Richard D. Averitt

Carbon nanotubes (CNT) have been recently proposed as stabilizers against grain growth that can happen even at low temperature inputs in nano-crystalline and ultrafine-grained materials obtained by severe plastic deformation. In this study,…

Theoretical calculations of the elastic response of carbon composites and amorphous carbon are reported. The studied composites consist of crystalline nanoinclusions, either spherical diamonds or carbon nanotubes, embedded in amorphous…

Materials Science · Physics 2011-11-09 Maria Fyta , P. C. Kelires

Carbon nanoscrolls (CNSs) are structures formed by rolling up graphene layers into a papyruslike shape. CNNs have been experimentally produced by different groups. Boron nitride nanoscrolls (BNNSs) are similar structures using boron nitride…

Materials Science · Physics 2014-02-28 Eric Perim , Douglas S. Galvao