PDF Publication Title:
Text from PDF Page: 141
Experimental Study of the Intrinsic and Exxpetriminenstaicl StTudryaonf tshepInotrintsiPc arnodpExetrintsieic sTraonsfpoGrt rParopehrtietseofaGnradphiMte aundltMigurltiagrpaphenne SeamSpalesmples 13117 Fig. 10. Relative difference between the two field branches of the hysteresis loop in the MR (see Fig. 9(a)) as a function of temperature for two different multigraphene samples at a constant field of 1.66 mT. Black squares () correspond to the data presented by Esquinazi et al. (2008); (⋆, , ∗) correspond to the results presented by Dusari, Barzola-Quiquia & Esquinazi (2011) for a multigraphene sample without and with two constrictions. The increase in the hysteresis using the constriction method is clearly seen. The samples without constrictions show granular superconducting-like hysteresis loops up to 10 K only, while samples with the constrictions show this behavior up to 50 K in the case of 4 μm constriction width. expected as well as in between some of them. Thermal fluctuations influence the coherent superconducting state in some parts of the sample and no zero resistance is achieved. To summarize the results reported so far in tens of nanometers samples as well as the first indications in HOPG bulk samples, two fundamental aspects must be remarked: first, metallic-like behavior of the resistivity in HOPG bulk is not intrinsic and not related to the scattering of conduction electrons with phonons, and second, if superconductivity plays a role in the anomalous properties observed in HOPG samples then the quasi-two dimensional interfaces may contain the superconducting regions (García et al., 2011). 4.5 Transport measurements of TEM lamellae As explained before, the indications for superconductivity in graphite get clearer when the sample dimensions are reduced to some extent. On the other hand, if the sample dimensions are further reduced, the intrinsic properties of the graphene layers inside graphite can be investigated. In order to further investigate the role of interfaces a different way of preparing samples from bulk graphite seems necessary. The main idea is to prepare small and narrow graphite samples (within the graphene planes) in order to confine the path of the input current to go through some of the possible superconducting interfaces running mostly parallel to the graphene planes. Further details of the process as well as the lamella dimensions can be seen in Fig. 11. Several lamellae have been studied and the results are presented in the following lines.PDF Image | GRAPHENE SYNTHESIS CHARACTERIZATION PROPERTIES
PDF Search Title:
GRAPHENE SYNTHESIS CHARACTERIZATION PROPERTIESOriginal File Name Searched:
Graphene-Synthesis.pdfDIY PDF Search: Google It | Yahoo | Bing
Salgenx Redox Flow Battery Technology: Power up your energy storage game with Salgenx Salt Water Battery. With its advanced technology, the flow battery provides reliable, scalable, and sustainable energy storage for utility-scale projects. Upgrade to a Salgenx flow battery today and take control of your energy future.
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |