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Current-driven magnetic domain-wall logic 期刊论文
NATURE, 2020, 579 (7798) : 214-+
作者:  Culp, Elizabeth J.;  Waglechner, Nicholas;  Wang, Wenliang;  Fiebig-Comyn, Aline A.;  Hsu, Yen-Pang;  Koteva, Kalinka;  Sychantha, David;  Coombes, Brian K.;  Van Nieuwenhze, Michael S.;  Brun, Yves, V;  Wright, Gerard D.
收藏  |  浏览/下载:51/0  |  提交时间:2020/07/03

Spin-based logic architectures provide nonvolatile data retention, near-zero leakage, and scalability, extending the technology roadmap beyond complementary metal-oxide-semiconductor logic(1-13). Architectures based on magnetic domain walls take advantage of the fast motion, high density, non-volatility and flexible design of domain walls to process and store information(1,3,14-16). Such schemes, however, rely on domain-wall manipulation and clocking using an external magnetic field, which limits their implementation in dense, large-scale chips. Here we demonstrate a method for performing all-electric logic operations and cascading using domain-wall racetracks. We exploit the chiral coupling between neighbouring magnetic domains induced by the interfacial Dzyaloshinskii-Moriya interaction(17-20), which promotes non-collinear spin alignment, to realize a domain-wall inverter, the essential basic building block in all implementations of Boolean logic. We then fabricate reconfigurable NAND and NOR logic gates, and perform operations with current-induced domain-wall motion. Finally, we cascade several NAND gates to build XOR and full adder gates, demonstrating electrical control of magnetic data and device interconnection in logic circuits. Our work provides a viable platform for scalable all-electric magnetic logic, paving the way for memory-in-logic applications.


  
Testing the emission reduction claims of CDM projects using the Benford's Law 期刊论文
CLIMATIC CHANGE, 2019
作者:  Cole, Matthew A.;  Maddison, David J.;  Zhang, Liyun
收藏  |  浏览/下载:15/0  |  提交时间:2020/02/17
Clean Development Mechanism  Emission reductions  Benford'  s Law  Data manipulation  
Using research networks to create the comprehensive datasets needed to assess nutrient availability as a key determinant of terrestrial carbon cycling 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2018, 13 (12)
作者:  Vicca, Sara;  Stocker, Benjamin D.;  Reed, Sasha;  Wieder, William R.;  Bahn, Michael;  Fay, Philip A.;  Janssens, Ivan A.;  Lambers, Hans;  Penuelas, Josep;  Piao, Shilong;  Rebel, Karin T.;  Sardans, Jordi;  Sigurdsson, Bjarni D.;  Van Sundert, Kevin;  Wang, Ying-Ping;  Zaehle, Soenke;  Ciais, Philippe
收藏  |  浏览/下载:27/0  |  提交时间:2019/04/09
nutrients  data syntheses  global vegetation models  manipulation experiments  carbon-nutrient cycle interactions