Granular superconductivity below 5~K in SPI-II pyrolytic graphite

Autor:	Ballestar, Ana, Esquinazi, Pablo, Böhlmann, Winfried
Rok vydání:	2014
Předmět:	Condensed Matter - Superconductivity
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.91.014502
Popis:	We have studied the transport properties of transmission electron microscope (TEM) lamellae obtained from a pyrolytic graphite sample of grade B (SPI-II) with electrical contacts at the edges of the graphene layers. The temperature, magnetic field, input current dependence of the resistance as well as the current-voltage characteristic curves are compatible with the existence of granular superconductivity below 5~K. TEM pictures of the studied lamellae reveal clear differences of the embedded interfaces to those existing in more ordered pyrolytic samples, which appear to be the origin for the relatively lower temperatures at which the granular superconductivity is observed. Comment: 5 figures, to be published in Phys. Rev. B
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1412.8573 Zobrazit plný text záznamu View this record from Arxiv