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The Switch in a Genetic Toggle System with Lévy Noise

2016, Xu, Y., Li, Y., Zhang, H., Li, X., Kurths, J.

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Sub-nanometre resolution of atomic motion during electronic excitation in phase-change materials

2016, Mitrofanov, Kirill V., Fons, Paul, Makino, Kotaro, Terashima, Ryo, Shimada, Toru, Kolobov, Alexander, V., Tominaga, Junji, Bragaglia, Valeria, Giussani, Alessandro, Calarco, Raffaella, Riechert, Henning, Sato, Takahiro, Katayama, Tetsuo, Ogawa, Kanade, Togashi, Tadashi, Yabashi, Makina, Wall, Simon, Brewe, Dale, Hase, Muneaki

Phase-change materials based on Ge-Sb-Te alloys are widely used in industrial applications such as nonvolatile memories, but reaction pathways for crystalline-to-amorphous phase-change on picosecond timescales remain unknown. Femtosecond laser excitation and an ultrashort x-ray probe is used to show the temporal separation of electronic and thermal effects in a long-lived (>100 ps) transient metastable state of Ge2Sb2Te5 with muted interatomic interaction induced by a weakening of resonant bonding. Due to a specific electronic state, the lattice undergoes a reversible nondestructive modification over a nanoscale region, remaining cold for 4 ps. An independent time-resolved x-ray absorption fine structure experiment confirms the existence of an intermediate state with disordered bonds. This newly unveiled effect allows the utilization of non-thermal ultra-fast pathways enabling artificial manipulation of the switching process, ultimately leading to a redefined speed limit and improved energy efficiency and reliability of phase-change memory technologies.

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Fishing-induced life-history changes degrade and destabilize harvested ecosystems

2016, Kuparinen, A., Boit, A., Valdovinos, F.S., Lassaux, H., Martinez, N.D.

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Basin stability in delayed dynamics

2016, Leng, S., Lin, W., Kurths, J.

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The Likelihood of Recent Record Warmth

2016, Mann, M.E., Rahmstorf, S., Steinman, B.A., Tingley, M., Miller, S.K.

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Impact of climate change on larch budmoth cyclic outbreaks

2016, Iyengar, S.V., Balakrishnan, J., Kurths, J.

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Transitions in a genetic transcriptional regulatory system under Lévy motion

2016, Zheng, Y., Serdukova, L., Duan, J., Kurths, J.