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Caltech: Magnetism Drives Metals to Insulators in New Experiment

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Like all metals, silver, copper, and gold are conductors. Electrons flow across them, carrying heat and electricity. While gold is a good conductor under any conditions, some materials have the property of behaving like metal conductors only if temperatures are high enough; at low temperatures, they act like insulators and do not do a good job of carrying electricity. In other words, these unusual materials go from acting like a chunk of gold to acting like a piece of wood as temperatures are lowered. Physicists have developed theories to explain this so-called metal–insulator transition, but the mechanisms behind the transitions are not always clear. ....

Yejun Feng , Patrick Lee , Thomas Rosenbaum , David Mandrus , John Slater , Nevill Francis Mott , Johns Hopkins University , Nature Communications , Okinawa Institute For Science , University Of Tennessee , Technology Graduate University , Okinawa Institute , Technology Graduate , William Davidow Presidential , Sir Nevill Francis Mott , Nobel Prize , Yishu Wang , பேட்ரிக் லீ , தாமஸ் ரோசன்பாம் , ஜான் ஸ்லேட்டர் , ஜான்ஸ் ஹாப்கின்ஸ் பல்கலைக்கழகம் , இயற்கை தகவல்தொடர்புகள் , ஓகைநாவ நிறுவனம் க்கு அறிவியல் , பல்கலைக்கழகம் ஆஃப் டென்னசி , தொழில்நுட்பம் பட்டதாரி பல்கலைக்கழகம் , ஓகைநாவ நிறுவனம் ,

Nanotechnology Now - Press Release: Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices

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Home > Press > Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices
An illustration of two domains (blue and orange) divided by a domain wall (white area) in a material. The magnetic order is designated with organized arrows (electron spins) while the colors represent two different domains (but the same magnetic order). In the material pictured here, the domain walls are conductive and the domains are insulating.
CREDIT
Yejun Fang
Abstract:
Like all metals, silver, copper, and gold are conductors. Electrons flow across them, carrying heat and electricity. While gold is a good conductor under any conditions, some materials have the property of behaving like metal conductors only if temperatures are high enough; at low temperatures, they act like insulators and do not do a good job of carrying electricity. In other words, these unusual material ....

Danielm Silevitch , Yejun Feng , David Mandrus , Thomas Rosenbaum , John Slater , Scotte Cooper , Nevill Francis Mott , Yejun Fang , Patrick Lee , Whitney Clavin , Steven Denbaars , John Bowers , Johns Hopkins University , Nature Communications , University Of Tennessee , National Science Foundation , Home Press Magnetism , Us Department Of Energy , Cabinet Office , Oak Ridge National Laboratory , Arrowhead Pharmaceuticals To Participate In Upcoming Conferences , Wave Inc , Semiconductor Week , Okinawa Institute Of Science , California Institute Of Technology , Okinawa Institute For Science ,

Magnetism Drives Metals to Insulators in New Experiment

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Magnetism Drives Metals to Insulators in New Experiment
Like all metals, silver, copper, and gold are conductors. Electrons flow across them, carrying heat and electricity. While gold is a good conductor under any conditions, some materials have the property of behaving like metal conductors only if temperatures are high enough; at low temperatures, they act like insulators and do not do a good job of carrying electricity. In other words, these unusual materials go from acting like a chunk of gold to acting like a piece of wood as temperatures are lowered. Physicists have developed theories to explain this so-called metal-insulator transition, but the mechanisms behind the transitions are not always clear. ....

Danielm Silevitch , Yejun Feng , David Mandrus , Thomas Rosenbaum , John Slater , Scotte Cooper , Nevill Francis Mott , Patrick Lee , Johns Hopkins University , Nature Communications , University Of Tennessee , National Science Foundation , Us Department Of Energy , Okinawa Institute Of Science , Cabinet Office , Okinawa Institute For Science , Oak Ridge National Laboratory , Okinawa Institute , Technology Graduate University , Office Of Scientific Research , Technology Graduate , William Davidow Presidential , Sir Nevill Francis Mott , Nobel Prize , Yishu Wang , Air Force Office ,

What Octopus Dreams Tell Us About the Evolution of Sleep

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Fruit flies, octopuses, birds, and humans don’t seem to have much in common. Some live on land, others are aquatic. Some fly, while others are earthbound. Some are vertebrates, others lack backbones. These creatures evolved separately and their common ancestors are far, far back in the evolutionary chain. But they may share one fundamental feature: They dream.
Nearly all creatures sleep, though there’s some debate as to whether single-celled organisms like paramecium do. But no one really knows
why. For years, researchers have bandied about theories that sleep helps with memory, growth, and learning and it’s clear that humans need sleep to function properly but there’s little else that’s well understood. “Sleep is this big black box,” says Marcos Frank, a neuroscientist at Washington State University. Frank likens sleep to a mysterious organ: It’s clear that it exists and is vital to a ....

Rio Grande Do Norte , Marcos Frank , Sidarta Ribeiro , Teresa Iglesias , Sylvia Medeiros , Washington State University , Brain Institute , Okinawa Institute For Science , Rapid Eye Movement , University Of Rio Grande Do Norte , Washington State , Federal University , Rio Grande , Okinawa Institute , ரியோ கிராண்டே செய் நார்ட் , மார்கோஸ் வெளிப்படையான , சில்வியா மேதேரோஸ் , வாஷிங்டன் நிலை பல்கலைக்கழகம் , மூளை நிறுவனம் , ஓகைநாவ நிறுவனம் க்கு அறிவியல் , விரைவான கண் இயக்கம் , பல்கலைக்கழகம் ஆஃப் ரியோ கிராண்டே செய் நார்ட் , வாஷிங்டன் நிலை , கூட்டாட்சியின் பல்கலைக்கழகம் , ரியோ கிராண்டே , ஓகைநாவ நிறுவனம் ,