期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 112, 期 9, 页码 2658-2663出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1418632112
关键词
electroburning; graphene; quantum interference; nanoelectronics; picoelectronics
资金
- UK EPSRC (Engineering and Physical Sciences Research Council) [EP/K001507/1, EP/J014753/1, EP/H035818/1, EP/J015067/1]
- EU [606728]
- Agency for Science Technology and Research (A*STAR)
- Oxford Martin School
- Royal Society
- Templeton World Charity Foundation
- EPSRC [EP/H035818/1, EP/M014452/1, EP/K001507/1, EP/J014753/1, EP/J015067/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K001507/1, EP/J015067/1, EP/H035818/1, EP/M014452/1, EP/J014753/1] Funding Source: researchfish
Provided the electrical properties of electroburnt graphene junctions can be understood and controlled, they have the potential to underpin the development of a wide range of future sub-10-nm electrical devices. We examine both theoretically and experimentally the electrical conductance of electroburnt graphene junctions at the last stages of nanogap formation. We account for the appearance of a counterintuitive increase in electrical conductance just before the gap forms. This is a manifestation of room-temperature quantum interference and arises from a combination of the semimetallic band structure of graphene and a cross-over from electrodes with multiple-path connectivity to single-path connectivity just before breaking. Therefore, our results suggest that conductance enlargement before junction rupture is a signal of the formation of electroburnt junctions, with a picoscale current path formed from a single sp(2) bond.
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