/Tag: Mechanics

The electronic structure and elastic property of monolayer and bilayer transition metal dichalcogenides MX$_2$ (M=Mo,W;X=O,S,Se,Te): A comparative first-principles study. (arXiv:1505.01640v1 [cond-mat.mtrl-sci])

2016-10-15T11:53:58+00:00May 8th, 2015|Categories: Publications|Tags: |

By Fan Zeng, Wei-Bing Zhang, Bi-Yu Tang First-principle calculations with different exchange-correlation functionals,
including LDA, PBE and vdW-DF functional in form of optB88-vdW, have been
performed to investigate the electronic and elastic properties of two
dimensional transition metal dichalcogenides(TMDCs) with the formula of
MX$_2$(M=Mo,W; X=O,S,Se,Te) in both monolayer and bilayer structures. The
calculated band structures show a direct band gap for monolayer …read more

Published in: arXiv Material Science

Strain engineering in semiconducting two-dimensional crystals. (arXiv:1504.07926v1 [cond-mat.mes-hall])

2016-10-15T11:56:35+00:00April 30th, 2015|Categories: Publications|Tags: |

By Rafael Roldán, Andrés Castellanos-Gomez, Emmanuele Cappelluti, Francisco Guinea One of the fascinating properties of the new families of two-dimensional
crystals is their high stretchability and the possibility to use external
strain to manipulate, in a controlled manner, their optical and electronic
properties. Strain engineering, understood as the field that study how the
physical properties of materials can be tuned by controlling the …read more

Published in: arXiv Material Science

Local curvature and stability of two-dimensional systems. (arXiv:1403.7361v2 [cond-mat.mtrl-sci] UPDATED)

2016-10-15T12:38:47+00:00November 24th, 2014|Categories: Publications|Tags: |

By Jie Guan, Zhongqi Jin, Zhen Zhu, Chern Chuang, Bih-Yaw Jin, David Tománek

We propose a fast method to determine the local curvature in two-dimensional
(2D) systems with arbitrary shape. The curvature information, combined with
elastic constants obtained for a planar system, provides an accurate estimate
of the local stability in the framework of continuum elasticity theory.
Relative stabilities of graphitic structures including fullerenes, nanotubes
and schwarzites, as …read more

Via:: arXiv Material Science

Mechanics of freely-suspended ultrathin layered materials. (arXiv:1409.1173v1 [cond-mat.mes-hall])

2016-10-15T12:57:14+00:00September 4th, 2014|Categories: Publications|Tags: |

By Andres Castellanos-Gomez, Vibhor Singh, Herre S.J. van der Zant, Gary A. Steele

The study of atomically thin two-dimensional materials is a young and rapidly
growing field. In the past years, a great advance in the study of the
remarkable electrical and optical properties of 2D materials fabricated by
exfoliation of bulk layered materials has been achieved. Due to the
extraordinary mechanical properties of these atomically thin …read more

Via:: arXiv Material Science

Bandgaps and directional propagation of elastic waves in two-dimensional square zigzag lattice structures. (arXiv:1402.5235v3 [cond-mat.mtrl-sci] UPDATED)

2016-10-15T13:10:47+00:00July 6th, 2014|Categories: Publications|Tags: |

By Yan-Feng Wang, Yue-Sheng Wang, Chuanzeng Zhang

In this paper we propose some kinds of two-dimensional square zigzag lattice
structures and study their bandgaps and directional propagation of elastic
waves. The band structures and the transmission spectra of the systems are
calculated by using the finite element method. The effects of the geometry
parameters of the 2d-zigzag lattices on the bandgaps …read more

Via: arXiv material science

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