科学与环境
Ultrashort laser pulses offer a new way to probe electrons' quantum geometry
来源: Phys.org - latest science and technology news stories · 发布于
Researchers at Friedrich Schiller University Jena and the University of Regensburg have developed a method for determining, using light, a quantum property of electrons that has hitherto been difficult to access. The focus is on what is known as Berry curvature—a quantity that de
Researchers at Friedrich Schiller University Jena and the University of Regensburg have developed a method for determining, using light, a quantum property of electrons that has hitherto been difficult to access. The focus is on what is known as Berry curvature—a quantity that describes certain geometric properties of the quantum mechanical states of electrons. The researchers measured it in a layer of the semiconductor tungsten diselenide, just one atomic layer thick, using ultrashort laser pulses.
The results have been published in the latest issue of the journal Nature Photonics.
相关报道
Humans and songbirds hear the same sounds, but organize them differently
Researchers from the University of Amsterdam and Leiden University have discovered that humans and songbirds use markedly different strategies to recognize sequences of complex sounds. The findings shed new light on how biology and experience shape the way we perceive complex sou
Phys.org - latest science and technology news stories ·
Researchers uncover multiple genetic paths that lead to mottled feathers in chickens
The white-tipped feathers found in many chicken breeds may look like variations of the same decorative pattern, but new research shows that they do not all share the same genetic origin.
Phys.org - latest science and technology news stories ·
Computational model guides lighting design to improve color discrimination in aging eyes
Researchers have developed a new computational model that accounts for the effects of aging on our eyes' ability to discriminate color. It could help guide lighting designs that make it easier for older adults to perceive colors while preserving the expected appearance for people
Phys.org - latest science and technology news stories ·
Thwaites Glacier could contribute twice as much sea-level rise as previously projected
A new ice sheet model developed by glaciologists at the University of California, Irvine and NASA's Jet Propulsion Laboratory projects that the melting of Thwaites Glacier in West Antarctica will contribute up to 30 millimeters (1.2 inches) of sea level rise by 2100—twice previou
Phys.org - latest science and technology news stories ·
New topological microscope tip reveals evidence of 2D altermagnetism
Researchers have fashioned a layered topological material into a scanning tunneling microscope (STM) tip that senses spin-related electronic states at atomic resolution.
Phys.org - latest science and technology news stories ·