Journal of Physics: Condensed Matter

Journal Information
ISSN / EISSN : 09538984 / 1361648X
Current Publisher: IOP Publishing (10.1088)
Total articles ≅ 35,339
Google Scholar h5-index: 60
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Latest articles in this journal

Mateus Schmidt, Marcos Vinicios Romitti, Sergio G Magalhaes, Fabio M Zimmer
Published: 20 September 2019
Journal of Physics: Condensed Matter; doi:10.1088/1361-648x/ab469c

The publisher has not yet granted permission to display this abstract.
Jiguo Wang, Shi-Jie Yang
Published: 20 September 2019
Journal of Physics: Condensed Matter; doi:10.1088/1361-648x/ab468d

The publisher has not yet granted permission to display this abstract.
Shuvojit Paul, Avijit Kundu, Ayan Banerjee
Published: 20 September 2019
Journal of Physics: Condensed Matter, Volume 31; doi:10.1088/1361-648x/ab32f3

Ruiping Li, Nannan Han, Yingchun Cheng, Wei Huang
Published: 20 September 2019
Journal of Physics: Condensed Matter, Volume 31; doi:10.1088/1361-648x/ab3f76

Sophie Schönfeld, Charles Lochenie, Gerald Hörner, Birgit Weber
Published: 20 September 2019
Journal of Physics: Condensed Matter, Volume 31; doi:10.1088/1361-648x/ab3e92

Jian Liu, Henrique Vazquez Muiños, Kai Nordlund, Flyura Djurabekova
Published: 20 September 2019
Journal of Physics: Condensed Matter, Volume 31; doi:10.1088/1361-648x/ab4094

Abstract:In spite of the versatility of electronic properties of graphene, its fragility and low resistance to damage and external deformations reduce the practical value of this material for many applications. Coating of graphene with a thin layer of hard amorphous carbon is considered as a viable solution to protect the 2D material against accidental scratches and other external damaging impacts. In this study, we investigate the relationship between the deposition condition and quality of diamond-like-carbon (DLC) on top of multilayer graphene by means of molecular dynamics simulations. Deposition of carbon atoms with 70 eV incident energy at 100 K resulted in the highest content of <i>sp</i><sup>3</sup>-bonded C atoms. An increase of the number of dangling bonds at the interface between the top graphene layer and the DLC film indicates that decrease of the incident energy reduces the adhesion quality of DLC thin film on graphene. Analysis of radial distribution function indicates that <i>sp</i><sup>3</sup> hybridized carbon atoms tend to grow near already existing <i>sp</i><sup>3</sup>-atoms. This explains why the quality of the DLC structures grown on graphene have generally a lower content of <i>sp</i><sup>3</sup> C atoms compared to those grown directly on diamond. Ring analysis further shows that a DLC structure grown on the <i>sp</i><sup>2</sup>-rich structures like graphene contains a higher fraction of disordered ring structures.
J Michael Gottfried, Ulrich Höfer
Published: 19 September 2019
Journal of Physics: Condensed Matter, Volume 31; doi:10.1088/1361-648x/ab3ff0

Mengjuan Zhang, Jiangling Pan, Wenzhe Zhou, Aolin Li, Fangping Ouyang
Published: 19 September 2019
Journal of Physics: Condensed Matter, Volume 31; doi:10.1088/1361-648x/ab3f77

Deepu Kumar, Birender Singh, Pawan Kumar, Viswanath Balakrishnan, Pradeep Kumar
Published: 19 September 2019
Journal of Physics: Condensed Matter, Volume 31; doi:10.1088/1361-648x/ab3fec

Abstract:We report a comprehensive temperature dependent Raman measurements on three different phases of monolayer WS2 from 4K to 330K in a wide spectral range. Our studies reveal the anomalous nature of the first as well as the higher order combination modes reflected in the disappearance of the few modes and anomalous temperature evaluation of the phonon self-energy parameters attributed to the detuning of resonance condition and development of strain due to thermal expansion mismatch with the underlying substrate. Our detailed temperature dependence studies also decipher the ambiguity about assignment of the two modes in literature near ~ 297 cm-1 and 325 cm-1. Mode near 297 cm-1 is assigned as first order Raman mode, which is forbidden in the backscattering geometry and 325 cm-1 is assigned to the combination of and mode. We also estimated thermal expansion coefficient by systematically disentangling the substrate effect in the temperature range of 4K to 330K and probed its temperature dependence in 1H, 1T and 1T' phases.
Danxi Yang, Xiaoli Fan, Yuanhao Gong, Shiguo Ma, Nijing Guo, Yan Hu, Enrico Benassi, Woon Ming Lau
Published: 19 September 2019
Journal of Physics: Condensed Matter; doi:10.1088/1361-648x/ab462a

Abstract:Layered transition metal trihalides ABX3 are the promising candidate materials for monolayer magnets. In this paper, we investigated the single-layer CrXSe3 (X = Sn, Ge, Si) as monolayer ferromagnetic semiconductors. Firstly, our calculated interlayer binding energies and mechanical properties demonstrate the feasibility of obtaining the free-standing monolayer CrXSe3 from the layered van der Waals crystal CrXSe3 via mechanical exfoliating method. Plus, we find that the ferromagnetic super-exchange interaction dominates over the anti-ferromagnetic direct-exchange interactions, making CrSnSe3 and CrGeSe3 monolayers ferromagnetic with the magnetic moments of 6.0 μB per unit cell. Particularly, the ferromagnetic configurations of CrSnSe3 and CrGeSe3 monolayers become more stable under the increasing tensile strain, and CrSiSe3 converts to ferromagnetic from anti-ferromagnetic under biaxial tensile strain larger than 2%. Additionally, the three monolayers CrXSe3 are all semiconducting with energy band gaps of 0.76, 0.87 and 1.1 eV for X being Sn, Ge and Si, respectively. Our results suggest CrXSe3 as monolayer ferromagnetic semiconductors holding promising potential in spintronics.