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Perfect Andreev reflection due to the Klein paradox in a topological superconducting state

mercredi 19 juin 2019 par Seunghun Lee, Valentin Stanev, Xiaohang Zhang, Drew Stasak, Jack Flowers, Joshua S. Higgins, Sheng Dai, Thomas Blum, Xiaoqing Pan, Victor M. Yakovenko, Johnpierre Paglione, Richard L. Greene, Victor Galitski, Ichiro Takeuchi
Nature, Published online: 19 June 2019; doi:10.1038/s41586-019-1305-1Perfect transmission of electrons through a finite potential barrier between a normal metal and a topological superconducting state is demonstrated, as evidenced by an exact doubling of conductance in point contact (...)

Location-level processes drive the establishment of alien bird populations worldwide

mercredi 19 juin 2019 par David W. Redding, Alex L. Pigot, Ellie E. Dyer, Çağan H. Şekercioğlu, Salit Kark, Tim M. Blackburn
Nature, Published online: 19 June 2019; doi:10.1038/s41586-019-1292-2Bayesian hierarchical regression analysis of a global database of bird introduction events reveals the environmental, climatic and biotic factors that are the primary determinants of the successful establishment of populations (...)

Top 10 institutions for chemistry in 2018

mercredi 19 juin 2019
Nature, Published online: 19 June 2019; doi:10.1038/d41586-019-01926-9These 10 institutions in the Nature Index were the largest contributors to chemistry papers published in 82 leading journals in 2018.

Top 10 academic institutions in 2018: normalized

mercredi 19 juin 2019
Nature, Published online: 19 June 2019; doi:10.1038/d41586-019-01924-xThis ranking shows which institutions might be punching above their weight in producing high-quality research.

CRISPR babies: when will the world be ready?

mercredi 19 juin 2019 par Heidi Ledford
Nature, Published online: 19 June 2019; doi:10.1038/d41586-019-01906-zEfforts to make heritable changes to the human genome are fraught with uncertainty. Here’s what it would take to make the technique safe and acceptable.

Tiny LED could light up a computer that fits on a speck of dust

mercredi 19 juin 2019
Nature, Published online: 19 June 2019; doi:10.1038/d41586-019-01896-yUltra-efficient light sources provide optical communication signals even at very low power levels.

Build science in Africa

mercredi 19 juin 2019 par Anagaw Atickem, Nils Chr. Stenseth, Peter J. Fashing, Nga Nguyen, Colin A. Chapman, Afework Bekele, Addisu Mekonnen, Patrick A. Omeja, Urs Kalbitzer
Nature, Published online: 19 June 2019; doi:10.1038/d41586-019-01885-1To cope with climate change and population growth, the continent urgently needs more home-grown researchers, argue Anagaw Atickem, Nils Chr. Stenseth and colleagues.

The top 10 countries that dominate natural-sciences research

mercredi 19 juin 2019
Nature, Published online: 19 June 2019; doi:10.1038/d41586-019-01921-0The United States reigns as the colossus but China is taking up ever more space, squeezing out European stalwarts.

In rankings, size is not the whole story

mercredi 19 juin 2019 par Catherine Armitage
Nature, Published online: 19 June 2019; doi:10.1038/d41586-019-01919-8Renowned institutions reign over the research ranks, except when high-quality research is considered as a proportion of total research.

Bizarre early life forms ate better when they ate together

mercredi 19 juin 2019
Nature, Published online: 19 June 2019; doi:10.1038/d41586-019-01935-8Simulations in a virtual flume tank suggest that primitive vase-shaped organisms were filter feeders.

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