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PCB007-Feb2021

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106 PCB007 MAGAZINE I FEBRUARY 2021 Leadership is a Learnable Skill But it takes effort, focus and perseverance. I learned the hard way, over a long period of time, that if you don't have influence you will never be able to lead others. If you're going to be successful in life the first thing you work on is to grow and raise your leadership lid. And the Pareto principle really does apply here: a little goes a long way. e minute that you be- gin to grow and raise your leadership lid, sud- denly, your results will begin to change. Lead- ership really is that important: Everything ris- es and falls with leadership. PCB007 References 1. "21 Irrefutable Laws of Leadership" by John C. Maxwell. Steve Williams is the president of The Right Approach Consulting. To read past columns or contact Williams, click here. ternal thing, not somewhere you necessari- ly go to grow. We have to choose growth over comfort, and that means getting out of the comfort zone regularly. It's a great way to raise your lead- ership lid. Getting around people who think dif- ferently is another great way to raise your lid. And it's the same in anything, isn't it? If you want to play a better golf game, stop playing with your friends and seek out better players. If you want to be a better leader, get around better leaders. nanoseconds, not enough time to form a superfluid. As a workaround, the electron and hole can be sep- arated by atomically-thin conducting layers, creating so-called "spatially indirect" excitons. The electrons and holes move along separate but very close con- ducting layers. This makes the excitons long-lived, and superfluidity has been observed. Sara Conti, co-author on the study, notes a problem: atomically-thin conducting layers are two-dimensional, and 2D systems have rigid restrictions that eliminate the superfluidity at temperatures above –170°C. The new proposed system of stacked atomically-thin lay- ers of transition metal dichalcogenide (TMD) semicon- ducting materials is three dimensional. Alternate layers are doped with excess electrons (n-doped) and excess holes (p-doped) and these form the 3D excitons. The study predicts exciton super- currents will flow in this system at tem- peratures as warm as –3°C. (Source: Arc Centre of Excel- lence in Future Low-Energy Electron- ics Technologies) Could a stack of 2D materials allow for supercur- rents at warm temperatures? A study published last year opens a new route to high-temperature super- currents at temperatures as "warm" as inside a kitch- en fridge. Previously, superconductivity has only been possi- ble at temperatures less than 170°C below zero. For this reason, the cooling costs of superconductors have been high. This new semiconductor superlattice device could form a new class of ultra-low energy electronics with vastly lower energy consumption than conventional, silicon-based (CMOS) electronics. Such is the aim of the FLEET Centre of Excellence. Oppositely charged electrons and holes can form tightly bound pairs, called excitons. Excitons can in principle form a quan- tum, "superfluid" state. With such tightly bound excitons, superfluidi- ty should exist even as high as room temperature. But in practice excitons have ex- tremely short lifetimes—just a few Kitchen-Temperature Supercurrents from Stacked 2D Materials

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