Stanford scientists invent two-dimensional material to store data instead of silicon chips

2020-07-02


Two-dimensional materials replace silicon chips to store data

A team of researchers led by Stanford University has invented a way to store data by sliding atomically thin metal layers on top of each other that could fit more data into a smaller space than a silicon chip while also using less energy.

The research, led by Aaron Lindenberg, an associate professor of materials science and engineering at Stanford University and a member of SLAC's National Accelerator Laboratory, is a major upgrade from the type of non-volatile memory storage done by today's computers using silicon-based technologies such as flash memory chips.


Terahertz radiation pulses shift adjacent atomic layers in the topological material tungsten ditelluride in opposite directions, distorting the material's atomic structure

The technique is based on a newly discovered class of metals that form incredibly thin layers, just three atoms thick. Researchers have made these metals, called "tungsten ditelluride," into a new type of metal that can form incredibly thin layers, only three atoms thick. The layers stacked up like a deck of nano-sized cards. By injecting a tiny electric current into the stack of cards, the researchers caused each odd-numbered layer to be slightly offset relative to the even-numbered layers above and below it. This offset was permanent, or nonvolatile, until another current shock caused the odd-numbered and even-numbered layers to again Rearrangement.

Lindenberg says, "The arrangement of layers becomes a way to encode information. On and off, 1s and 0s were created to store binary data."


Characterization of two different electrically driven phase transitions in two-dimensional tungsten telluride

To read the digital data stored between these changing atomic layers, the researchers used a quantum property known as Berry curvature, which manipulates electrons in the material like a magnetic field to read the alignment of the layers without disturbing the stack.

Jun Xiao, a postdoctoral scholar in Lindenberg's lab and first author of the paper, said that moving the layers back and forth The amount of energy required is very small. This means that writing a 0 or 1 to the new device should require much less energy than today's non-volatile memory technology. Moreover, according to research by the same team published last year in the journal Nature, the sliding of atomic layers can happen so quickly that the So much so that data storage can be completed more than a hundred times faster than existing technology.

The design of the prototype is based in part on co-author Xiaofeng Qian, assistant professor at Texas A&M University. ) and Hua Wang, a graduate student in his lab, contributed to the theoretical calculations. After the researchers observed experimental results consistent with theoretical predictions, they performed further calculations, which led them to believe that the Further refinement of the design will greatly increase the storage capacity of this new method, opening the way for the development of a new class of ultrathin two-dimensional materials that are also capable of being used. Paving the way for a much more powerful non-volatile memory shift.

The team has already filed a patent application for their technology, while further refining their memory prototype and design. They also plan to look for other 2-D materials that can serve as data storage media even better than "tungsten ditelluride". better.

Says Lindenberg: "Very small adjustments to these ultrathin layers have a big impact on their functional properties. We can use this knowledge to design new energy-efficient devices for a sustainable and smart future."

The study was published in the journal Nature Physics.


NASA's 2024 return mission to the moon is in serious financial trouble

It's also worth noting that the timeline for NASA's 2024 lunar exploration efforts is already tight, and any delay could result in a significant delay in the actual mission date to return humans to the moon.

2020-07-16


Everything dies, so does time itself stop?

It is true that time is a somewhat abstract thing, as it is not an entity that can be seen and touched, and it is also vague in feeling, sometimes feeling that time exists objectively, and sometimes feeling that it does not exist, but is merely artificially defined.

2020-07-16


NASA and ESA to release first images of solar orbiter this week

The Solar Orbiter is the first medium-class mission launched under the ESA's Cosmic Vision 2015-2025 program to answer key questions about the solar system, the emergence of the universe, the fundamental physics that shaped nature, the development of plants and how life forms in the universe.

2020-07-14


Two neutron stars found 130 million light-years away: will collide and merge in 470 million years

Astronomers have discovered an unusual pulsar, one of the "beacons" of a highly magnetized, spinning neutron star that spins from its magnetic poles... Emitting highly focused radio waves. This newly discovered pulsar, PSRJ1913+1102, is part of a binary system, which means it is in close proximity to the other pulsar. A neutron star is locked in an extremely tight orbit.

2020-07-14


How the Universe Comes Together, Dark Matter Mapping Reveals the Mystery Behind It

The fact that no object is thrown out by centrifugal force as the Earth rotates is evidence that there is some force that may have a bearing on matter generating constraints. The experiment uses the same principle as the largest experiment in human history - Lord Rutherford's discovery of the atom in 1908 - to create a constraint. The principle is the same.

2020-07-14


Take a look at the mantle from 6 angles

Here, seismic waves are so strongly influenced that most researchers believe the rocks here are not only different crystallographically, but more likely chemically as well.

2020-07-14


Using X-rays for navigation, how do they do it?

NASA has invented a new type of autonomous space navigation that can see man-made spacecraft fly to the far reaches of the solar system and beyond by using pulsars as guide stars.

2020-07-14


Getting to Mars is the biggest dream, the Mars program is becoming clearer, and the lunar space station is critical

The closest distance between Earth and Mars is also 54.6 million kilometers, which does sound a lot farther away, but we need to be aware that Earth and There is also the Moon between Mars and Mars, so scientists plan to use the Moon as a "springboard" to get to Mars. This "springboard" is in fact a series of lunar programs, in which the realization of the lunar surface base, lunar orbiting space station is the lunar program of the Focus.

2020-07-09


July Astronomical Spectacular: Comet NEOWISE Solo Show Coming Up, Get This Schedule!

There has already been one stable visible comet during 2020, including C2019 Y1 and Y4 ATLAS, 2017 T2 PanSTARRS and 2019 U6 Lemmon.

2020-07-09


It's spectacular! Hubble telescope captures: stellar fireworks 8,000 light-years away from universe

It's spectacular. Beautiful cosmic fireworks, and astronomers have taken a stunning new image with the Hubble Space Telescope showing star clusters. Celestial fireworks in G286.21+0.17.

2020-07-09











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