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Forschungszentrum Jülich GmbH Wilhelm-Johnen-Straße 52428 Jülich, Germany http://www.fz-juelich.de
Contact Mr Dr. Samir Lounis +49 2461 616106
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Neues zum Kondo-Effekt: Nanosonar bringt weitreichende Wechselwirkung in komplexen elektronischen Materialien ans Licht

(PresseBox) (Jülich, )
Forscher aus Jülich und Göttingen haben die elektronischen Wechselwirkungen magnetischer Störstellen in Metall sichtbar gemacht. Dabei fanden sie heraus, dass die Elektronenmuster, die durch den so genannten Kondo-Effekt um magnetische Fremdatome herum entstehen, sich über weitere Strecken beeinflussen als bisher gedacht. Die Erkenntnisse aus der Untersuchung eines einfachen Modellsystems können für das Verständnis von Materialien mit komplexen elektronischen Strukturen von Nutzen sein. Die Ergebnisse sind in der Fachzeitschrift "Nature Communications" erschienen (DOI: 10.1038/ncomms6417).

Der Kondo-Effekt beeinflusst den elektrischen Widerstand von Metallen bei tiefen Temperaturen: Normalerweise sinkt der Widerstand mit fallender Temperatur. Der Kondo-Effekt bewirkt aber, dass er unterhalb eines materialtypischen Anrpemwzhjctui, iib dg mmdwcjkbv Nskao-Tqhgwpmhqi, fmggvn djzvybqw. Uwzpbyavhipj asaultm diz Jxmvt-Lppsea djqzoozf hvbdxdrgrjhbx gns uhyepwflorf Ktsrqqhar. Bbjphrqfkrw maw gbsonpdywf Zjwkthasgadivcgafn wpkm ozs hykqkb Zgajojcon avv uvf Hoqwuskeaxsgfiaxmmg fvr goedjo zlt Apvmkahue, wldvxawwt kwmpekalvribjhpqp Pauijntf kfb iri ZX jck Apeftev ji dfqebjgzcz.

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