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New Advances Using Exotic Matter May Lead to Ultrafast Computing February 17, 2021 In the 1960s, an exotic phase of matter known as an excitonic insulator was proposed. Decades later, evidence for this phase was found in real materials. Recently, particular attention has centered on Ta2NiSe5 because an excitonic insulator phase may exist in this material at room temperatures. The substance is made up of the elements tantalum, nickel, and selenium, and has the potential to lead to breakthroughs in more power-efficient, faster computers. Now, in a new Physical Review Letters study from Caltech, researchers have, for the first time, figured out how to flip the bits of the excitonic insulator found in Ta2NiSe5. Computers communicate using a binary language of 1s and 0s, which are also called bits. For computers to work, the bits need to switch on or off (with 1s being on and 0s off). Some of today s computing hardware works by flipping the magnetic moments, or orientations

Gil refaelOmar mehioDavid hsiehCaltech taylorw lawrenceMichael buchholdTakashi kurumajiJoseph checkelskyInstitute for quantum informationDepartment of energyDefense advanced research projects agencyNational science foundationYamada science foundation fellowship for researchPhysical review lettersQuantum informationHonglie ningUltrafast reversal