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A research team from City University of Hong Kong (CityU) recently successfully achieved lattice-mismatch-free construction of III-V/chalcogenide core-shell heterostructure nanowires for electronic and optoelectronic applications. This breakthrough addresses crucial technological challenges related to the lattice mismatch problem in the growth of high-quality heterostructure semiconductors, leading to enhanced carrier transport and photoelectric properties.

Nanoscale transistors are in demand for efficient digital circuits, and biasing of each device is critical. These stringent biasing conditions can be relaxed by obtaining precise values of the threshold voltages of the transistor. This leads to more tolerant logic states to the electrical noise.

To meet the requirements of reduced power consumption, CMOS field-effect transistors (FETs) are fabricated such that they operate in enhancement (E) mode, i.e., there are no free charge carriers in the channel at zero gate voltage. On the other hand, depletion (D) mode transistors have higher currents than enhancement mode due to ample charge carrier density.

In contrast to switching applications of FET, for high-frequency applications, off-state of FET is not a compulsory requirement. In fact, the presence of a channel at zero gate bias is advantageous to obtain high transconductance at lower voltages. For Si FETs, the enhancement or depletion modes were determined at the fabrication step of ion implantation doping. However, it is challenging to implement this solution for the new generation of thin materials like organic semiconductors and 2D materials.

Byreddy, O, and Choi have improved detector capabilities for compact, in-hand millimetre wave imaging devices.

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“Because like-charged objects in a vacuum are expected to repel regardless of whether the sign of the charge they carry is positive or negative, the expectation is that like-charged particles in solution must also monotonically repel,” the researchers wrote in the paper.

Continue reading “Opposites attract? Not in new experiment that finds loophole in fundamental rule of physics” »

Invisible to the naked eye, an entire ecosystem buzzes with bioenergy.

SDPO

Don’t Use Your Data All at Once https://huggingface.co/papers/2403.

As development of large language models (LLM) progresses, aligning them with human preferences has become increasingly important.

Continue reading “SDPO: Don’t Use Your Data All at Once” »

A proposed approach to detect Majorana fermions in Kitaev spin liquids by using scanning tunneling microscopy could lead to the unambiguous confirmation of both the spin-liquid state and its Majorana zero modes.

Dive into the ripple effect of musculoskeletal pain on quality of life among Saudi adults. Click the link to uncover more ➡️ https://bit.ly/3vqK9D

Background.

Musculoskeletal pain (MSP) is widely recognized as a prevalent public health issue that affects individuals of various genders and age groups. The aim of this study is to assess the influence of musculoskeletal pain on the quality of life (QoL) of adult individuals living in Saudi Arabia.

Continue reading “Impact of Musculoskeletal Pain on Health-Related Quality of Life Among Adults in Saudi Arabia” »

Amazon is betting big on Anthropic even as it plans to compete with it.