סמינר בחומר מעובה: Towards the onset of collective interactions: nano-functional systems

Abstract: 

Understanding the competition between order and disorder in nature is a major task of physics. Systems that exhibit a sudden emergence of collective interactions allow a unique glimpse into this competition. For instance, such ‘collectiveness’ conveniently exists at the superconducting-to-insulating transition (SIT) and the para-ferro transition. Yet, challenges associated with preparing and characterising nanoscale superconductors and ferroics have hindered their scientific and technological potential.[1,2] We will discuss the ferroelectric size-dependence,[2,3] including recently-discovered hybrid ferroelectric-ferroelastic domain types [4] that assist us in resolving the longstanding dispute over the ferroelectric domain switching mechanism.[5] Likewise, universal size effects in superconductivity near the superconducting-to-insulating transition will be presented,[6] as well as implications for advanced nano-superconducting systems. Finally, some potential future avenues for exposing the onset of collective interactions in superconducting and ferroic systems will be suggested.

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[2] Y. Y. Ivry et al. (In press, Springer, 2014).

[3] Ivry et al. APL. 94 162903 (2009).

[4] Y. Ivry et al. PRL 104 207602 (2010); C. Durkan et al. APL 97 046102 (2010); Y. Ivry et al. Nanotech 21 065702 (2010); Y. Ivry et al. Nano Lett 11 4619 (2011); Y. Ivry et al. Adv Funct Mater 21 1827 (2011); Y. Ivry et al. Adv Funct Mater 24 5567 (2014).

[5] Y. Ivry et al. PRB 86 205428 (2012); Y. Ivry et al. PRB 81 174118 (2010); 6. Y. Ivry et al. arXiv1407.5945 [In press PRB (2014)].

מארגן הסמינר: פרופ' שמשון ברעד