Semiconductor devices such as LEDs and transistors generally consist of two halves: an n-type, which carries negative charge via electrons, and a p-type, which moves positive charge carriers called holes that are essentially electron voids. Both halves rely on contacts that allow electric current to flow in and out with minimal energy loss. These connections, known as ohmic contacts, have been an efficiency bottleneck in thin p-type GaN semiconductors for decades because of their high resistance.
New low-resistance contacts pave way for improved gallium nitride semiconductor devices
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Bad housing, high crime and poor schools are more important than transportation or income when it comes to accessing healthy food in neighborhoods historically subjected to “redlining”—the now-illegal practice once used to refuse loans, insurance [...]
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Online spaces, and social media in particular, are forums for vigorous political debate. They provide a space for members of the public to express political opinions, organize and sometimes even interact directly with politicians. While [...]
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Do your social media accounts feed you content that reflects your core beliefs and guiding principles? Our new research published in the Proceedings of the National Academy of Sciences shows that the algorithms supplying your [...]
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When the U.S. Food and Drug Administration (FDA) proposed banning menthol cigarettes and flavored cigars in 2022, nearly 250,000 public comments flooded in—a record response that led the Biden administration to delay a final decision.This [...]
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UC San Francisco’s Industry Documents Library, in partnership with the Minnesota Attorney General’s Office, has made public nearly 700 internal documents from a Midwest retailer as part of the state’s lawsuit alleging the company ignored [...]
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A new study finds that one side effect of Trump-era trade wars has been cheaper whiskey in much of the United States. But if you live in whiskey hubs Kentucky or Tennessee, your prices actually [...]
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Climate change is making Australia’s housing crisis more dangerous for older women. Extreme heat, floods, fires and storms are turning insecure housing into a safety issue, not just an affordability issue.This post was originally published [...]
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Companies with strong political connections are more likely to escape scrutiny over greenwashing, according to new research from Durham University Business School. Greenwashing occurs when organizations overstate or misrepresent their environmental performance to appear more [...]
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New research from the University of Kansas has found that the more media-literate people are, the more they trust institutions such as government and nonprofits. In addition, their social media habits can predict civic engagement.This [...]
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Members of Parliament from the UK’s three biggest political parties in the House of Commons significantly overestimate levels of public resistance to major policy proposals for tackling climate change, a University of Cambridge study suggests. [...]
