Delft University of Technology

About: Delft University of Technology is a education organization based out in Delft, Zuid-Holland, Netherlands. It is known for research contribution in the topics: Computer science & Catalysis. The organization has 37681 authors who have published 94404 publications receiving 2741710 citations. The organization is also known as: TU-Delft & Technische Hogeschool Delft.

Room-temperature gating of molecular junctions using few-layer graphene nanogap electrodes.

Abstract: We report on a method to fabricate and measure gateable molecular junctions that are stable at room temperature. The devices are made by depositing molecules inside a few-layer graphene nanogap, formed by feedback controlled electroburning. The gaps have separations on the order of 1–2 nm as estimated from a Simmons model for tunneling. The molecular junctions display gateable I–V-characteristics at room temperature.

4π-periodic Josephson supercurrent in HgTe-based topological Josephson junctions.

Abstract: The Josephson effect describes the generic appearance of a supercurrent in a weak link between two superconductors. Its exact physical nature deeply influences the properties of the supercurrent. In recent years, considerable efforts have focused on the coupling of superconductors to the surface states of a three-dimensional topological insulator. In such a material, an unconventional induced p-wave superconductivity should occur, with a doublet of topologically protected gapless Andreev bound states, whose energies vary 4π-periodically with the superconducting phase difference across the junction. In this article, we report the observation of an anomalous response to rf irradiation in a Josephson junction made of a HgTe weak link. The response is understood as due to a 4π-periodic contribution to the supercurrent, and its amplitude is compatible with the expected contribution of a gapless Andreev doublet. Our work opens the way to more elaborate experiments to investigate the induced superconductivity in a three-dimensional insulator.

The Meaning of ‘Build Back Better’: Evidence From Post‐Tsunami Aceh and Sri Lanka

Abstract: The 26 December 2004 tsunami disaster around the Indian Ocean provided an opportunity to see if decades of knowledge and experience on post-disaster settlement and shelter could be applied to match the tagline which many groups gave to the post-tsunami reconstruction: 'build back better' (or 'building back better'). This paper uses evidence from field work completed on implementing settlement and shelter in post-tsunami Aceh and Sri Lanka to examine whether or not the theory and practice of 'build back better' were witnessed. Focusing on settlement and shelter, four areas are examined: (i) safety, security, and livelihoods; (ii) how post-disaster settlement and shelter could have an improved connection with permanent housing and communities (the 'transition to what?' question); (iii) fairness and equity; and (iv) connecting relief and development by tackling root causes of vulnerability. Based on the field work, addressing these four areas is suggested as how 'build back better'could be implemented. Recommendations are: 1. Community involvement is essential, but that does not necessarily mean community control. 2. Organizations involved in implementing transitional settlement and shelter need to consider their capacity and links to other sectors. 3. Thinking ahead is necessary by integrating relief and development through long-term planning and disaster risk reduction. Overall, 'building back safer' might be a preferable tagline to 'building back better' because 'better' has multiple interpretations, many of which caused further problems, whereas 'safer' provides a clearer goal on which to focus for post-disaster settlement and shelter. © 2008 The Author. Journal compilation © 2008 Blackwell Publishing Ltd.