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MessagePosté le: Jeu 16 Aoû - 10:23:13 (2018)    Sujet du message: direction even without Répondre en citant

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SAN FRANCISCO, June 10 (Xinhua) -- A team of researchers has for the first time discovered magnetism in the 2-D world of monolayers Eddie Jackson Bears Jersey , or materials that are formed by a single atomic layer.

The findings, published this week in the journal Nature, demonstrate that magnetic properties can exist even in the 2-D realm, opening a world of potential applications, as magnetic materials form the basis of technologies that play increasingly pivotal roles in our lives today.

""What we have discovered here is an isolated 2-D material with intrinsic magnetism Tarik Cohen Bears Jersey , and the magnetism in the system is highly robust,"" said Xiaodong Xu, a professor of physics and of materials science and engineering at the University of Washington (UW). ""We envision that new information technologies may emerge based on these new 2-D magnets.""

Xu and Massachusetts Institute of Technology (MIT) physics professor Pablo Jarillo-Herrero led the international team of researchers who proved that the material, chromium triiodide, or CrI3 Adam Shaheen Bears Jersey , has magnetic properties in its monolayer form.

Other groups, including co-author Michael McGuire at the Oak Ridge National Laboratory, which is managed for the United States Department of Energy, had previously shown that CrI3, in its multilayered Mitchell Trubisky Bears Jersey , 3-D, bulk crystal form, is ferromagnetic. In ferromagnetic materials, the ""spins"" of constituent electrons, analogous to tiny Anthony Miller Bears Jersey , subatomic magnets, align in the same direction even without an external magnetic field.

However, no 3-D magnetic substance had previously retained its magnetic properties when thinned down to a single atomic sheet.

""You simply cannot accurately predict what the electric, magnetic, physical or chemical properties of a 2-D monolayer crystal will be based on the behavior of its 3-D bulk counterpart James Daniels Bears Jersey ,"" co-lead author and UW doctoral student Bevin Huang was quoted as saying in a news release from the university in U.S. Pacific Northwest.

Atoms within monolayer materials are considered ""functionally"" two-dimensional because the electrons can only travel within the atomic sheet, like pieces on a chessboard.

The researchers used a special type of microscopy to detect a signature in CrI3, as in other ferromagnetic materials when a beam of polarized light is reflected off the material's surface, indicative of intrinsic ferromagnetism in an isolated monolayer.

And surprisingly, in CrI3 flakes that are two layers thick Roquan Smith Bears Jersey , the telltale optical signature disappeared. This indicates that the electron spins are oppositely aligned to one another, a term known as anti-ferromagnetic ordering. Ferromagnetism returned in three-layer CrI3.

Yet to conduct further studies to understand why CrI3 displayed these layer-dependent magnetic phases, Xu noted that ""2-D mo. Cheap Eagles Jerseys   Cheap Miami Dolphins Jerseys   Wholesale Chargers Jerseys   Wholesale Buccaneers Jerseys   Wholesale San Francisco 49ers Jerseys   Wholesale Team Sweden Hockey Jerseys   Wholesale Team North America Hockey Jerseys   Wholesale Minnesota Wild Jerseys   Wholesale Dallas Stars Jerseys   Wholesale Buffalo Sabres Jerseys 


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