Stanen

from Wikipedia, the free encyclopedia

Stanen ( English stanene ) is the name for a modification of tin with a two-dimensional structure, in which each tin atom is surrounded by three more, so that a honeycomb-shaped pattern is formed. Since the material is very reminiscent of the carbon material graphene , it is analogously referred to as Stanen (derived from the Latin word for tin “stannum”).

Manufacturing

Stanen can be produced with the help of molecular beam epitaxy . In this process, tin is deposited on a crystal surface (such as bismuth telluride or gold ), where it then also forms a crystal. It was created in this way for the first time in 2015 as a monatomic layer structure; very thin films of tin had already been produced before that, although they still consisted of several atomic layers.

properties

Stanen with its honeycomb structure is very similar to graphene, but the atoms are not arranged flat, but shifted slightly up and down. According to theoretical predictions, the material compared to the graph and the other analyzed two-dimensional materials has this group of silicene , Germans , Antimonen , Arsenen and phosphors additional notable features. It should act as a topological insulator at room temperature and thus conduct electricity along its edges without loss. Initial investigations show some properties that match the theoretical predictions, but the behavior as a topological insulator could not be proven, for which the scientists blame the carrier material.

literature

  • Sivacarendran Balendhran, Sumeet Walia, Hussein Nili, Sharath Sriram, Madhu Bhaskaran: Elemental Analogues of Graphene: Silicene, Germanene, Stanene, and Phosphoren. In: Small. 11, 2015, pp. 640-652, doi: 10.1002 / smll.201402041 .

Individual evidence

  1. ↑ a b c Jan Dönges: 2-D material made of tin: For the first time, ultra-flat stems made. Spectrum of Science, accessed August 8, 2015.
  2. ↑ Sandeep Nigam, Sanjeev Gupta, Douglas Banyai, Ravindra Pandey, Chiranjib Majumder: Evidence of a graphene-like Sn-sheet on a Au (111) substrate: electronic structure and transport properties from first principles calculations. In: Phys. Chem. Chem. Phys. 17, 2015, pp. 6705-6712, doi: 10.1039 / c4cp04861j .
  3. ↑ Chris Cesare: Stanene makes its debut / Physicists announce graphene's latest cousin: stanene. In: Nature. 524, 2015, p. 18, doi: 10.1038 / nature.2015.18113 .
  4. ↑ M. Modarresi, Alireza Kakoee, Y. Mogulkoc, MR Roknabadi: Effect of external strain on electronic structure of stanene. In: Computational Materials Science. 101, 2015, pp. 164–167, doi: 10.1016 / j.commatsci.2015.01.039 .