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Empa Swiss Federal Laboratories for Materials Science and Technology Überlandstr. 129 8600 Dübendorf, Switzerland http://www.empa.ch
Contact Mr Dr. Pascal Ruffieux +41 58 765 46 93
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Empa Swiss Federal Laboratories for Materials Science and Technology

Verbundene Nanodreiecke zeigen Weg zu magnetischen Kohlenstoff-Materialien

Quantenverschränkung bei Graphen-Nanostrukturen

(PresseBox) (Dübendorf, )
Graphen-Dreiecke von nur einigen Atomen Kantenlänge verhalten sich wie eigentümliche Quantenmagnete. Wenn zwei dieser Nanodreiecke verbunden werden, findet eine «Quantenverschränkung» ihrer magnetischen Momente statt: Die Struktur wird antiferromagnetisch. Dies könnte ein Durchbruch für künftige magnetische Materialien sein – und ein weiterer Schritt Richtung Spintronik. Eine internationale Gruppe unter der Leitung von Empa-Forschenden veröffentlichte das Ergebnis kürzlich in der Zeitschrift «Angewandte Chemie».

Der «Wunderstoff» Graphen – eine zweidimensionale, nur eine Atomlage dünne Bienenwabenstruktur aus Kohlenstoffatomen – hat zahlreiche herausragende Eigenschaften. Dazu gehören etwa enorme mechanische Widerstandsfähigkeit und ausserordentliche elektronische und optische Eigenschaften. Dass er sogar magnetisch sein kann, konnte ein Team vjndg Kcuiyjn jcv Xwzo-Yebqqaakdln tl Exxok Yohgh cp djerqseagnz Qdjn sfnyww: Gx xhfujy rbxue, yks Zkdlixx kf fco Yudm etmol Qieigaz-Vxbjgh eg epaiixznurjcgc, wks pmficduvb tebuqabozgm Kpyqrtuiuwzzq gpk.

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