Semimetal

2/14/2022by admin
  1. Semimetal In Group 5a
  2. Semimetal In Group 4a
  3. Semimetal In Group 4a
  4. Nonmetal
  5. Transition Metal
[Submitted on 19 Dec 2017 (v1), last revised 1 Oct 2019 (this version, v3)]
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As nouns the difference between metalloid and semimetal is that metalloid is (chemistry) an element, such as silicon or germanium, intermediate in properties between that of a metal and a nonmetal; especially one that exhibits the external characteristics of a metal, but behaves chemically more as a nonmetal while semimetal is. The semimetal/semiconductor is most popular 2D heterostructure investigated by the researchers. The numerous unique properties of semimetal graphene open the wide possibility in this structure.

Abstract: Magnetic Weyl semimetals with broken time-reversal symmetry are expected togenerate strong intrinsic anomalous Hall effects, due to their large Berrycurvature. Here, we report a magnetic Weyl semimetal candidate Co3Sn2S2 with aquasi-two-dimensional crystal structure consisting of stacked Kagome lattices.This lattice provides an excellent platform for hosting exotic quantumtopological states. We observe a negative magnetoresistance that is consistentwith the chiral anomaly expected from the presence of Weyl fermions close tothe Fermi level. The anomalous Hall conductivity is robust against bothincreased temperature and charge conductivity, which corroborates the intrinsicBerry-curvature mechanism in momentum space. Owing to the low carrier densityin this material and the significantly enhanced Berry curvature from its bandstructure, the anomalous Hall conductivity and the anomalous Hall anglesimultaneously reach 1130 S cm-1 and 20%, respectively, an order of magnitudelarger than typical magnetic systems. Combining the Kagome-lattice structureand the long-range out-of-plane ferromagnetic order of Co3Sn2S2, we expect thatthis material is an excellent candidate for observation of the quantumanomalous Hall state in the two-dimensional limit.

Submission history

From: E.K. Liu [view email]
[v1] Tue, 19 Dec 2017 00:11:11 UTC (2,601 KB)
[v2] Sun, 31 Dec 2017 09:58:45 UTC (2,251 KB)
[v3]Tue, 1 Oct 2019 16:49:31 UTC (1,374 KB)
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Definitions

from The Century Dictionary.

  • noun In old chemistry, a metal that is not malleable, as bismuth, arsenic, antimony, zinc, etc.

Semimetal In Group 4a

from the GNU version of the Collaborative International Dictionary of English.

  • noun(Chem.), obsolete An element possessing metallic properties in an inferior degree and not malleable, as arsenic, antimony, bismuth, molybdenum, uranium, etc.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • nounchemistry a metalloid

Etymologies

Examples

  • Initially considered a waste product in mining, it was identified as a semimetal by the Swedish chemist and metallurgist Georg Brandt in the 1730s.

  • I did my diploma work under Prof.G. Busch on the Hall effect of grey tin, now known as a semimetal, and, prompted by his fine lectures, also became acquainted with modern solid-state physics.

  • Graphene has significant potential for application in electronics but cannot be used for effective field-effect transistors operating at room temperature because it is a semimetal with a zero bandgap.

  • Especially in cases of high value or trees that are either semimetal in nature or hard to replace the results can be catastrophic and either hard to replace, very expensive to replace or both.

  • Graphene, or single-layered graphite, with its high crystallinity and interesting semimetal electronic properties, has emerged as an exciting two-dimensional material showing great promise for the fabrication of nanoscale devices.

  • · physical state (gas, liquid, solid - at room temperature) · metal state (metal, semimetal, non-metal) · isotope information (some or all natural isotopes, no natural elements) · radioactive state (radioactive, non-radioactive) · melting point

Related Words

Nonmetal

Comments

Transition Metal

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