Tag

Electron Dynamics

All articles tagged with #electron dynamics

science26 days ago•5 min saved

Gravity-like quantum geometry steers electrons, hinting at faster electronics

Researchers at the University of Geneva and collaborators observed the quantum metric—a hidden geometric feature at the SrTiO3/LaAlO3 oxide interface—that distorts electron trajectories under strong magnetic fields, bending them like gravity bends light. This experimental confirmation of a long-theorized quantum geometry could improve understanding of material properties and enable faster, more efficient electronics and advances in quantum technologies, including terahertz devices and superconductivity.

via ScienceDaily|

#electron-dynamics #gravity-like-bending #quantum-materials

science1 month ago•13 min saved

Real-time electron choreography reveals how bonds break

Researchers used ultrafast electron diffraction and CPDF analysis to image both electrons and nuclei in real space as ammonia (NH3) undergoes N–H dissociation, providing the first real-time view of valence-electron rearrangements during bond breaking and highlighting how quantum dynamics govern chemical reactions and energy transfer.

via Interesting Engineering|

#ammonia #bond-breaking #electron-dynamics

science6 months ago•37 min saved

Electrons' Handedness Unveiled in Attosecond Photoionization

The article reports the first use of circularly polarized attosecond pulses to study and control chiral electron dynamics in molecules, revealing attosecond-scale control over photoelectron circular dichroism (PECD) and photoionization delays, with implications for understanding chiral phenomena and applications in spintronics and biosensing.

via Nature|

#attosecond #chiral-photoionization #circularly-polarized-light

science2 years ago•3 min saved

Unveiling Liquid Secrets: Intense Lasers Illuminate Electron Dynamics

Researchers have used intense laser fields to investigate electron dynamics in liquids, shedding light on the high-harmonic spectrum and the role of the electron's mean free path in determining photon energy limits. By studying the behavior of liquids under intense laser irradiation, the team discovered that the maximum photon energy obtained through high-harmonic generation (HHG) in liquids is independent of the laser's wavelength. They identified the electron's mean free path as the crucial factor that imposes a ceiling on photon energy and developed an analytical model to account for electron scattering. This research provides new insights into ultrafast dynamics in liquids and establishes HHG as a spectroscopic tool for studying electron behavior in this phase of matter.

via SciTechDaily|

#electron-dynamics #high-harmonic-generation #intense-lasers

science-and-technology2 years ago•3 min saved

Unprecedented Study Reveals Molecular Charge Migration Speed

Researchers from Huazhong University of Science and Technology have successfully measured the speed of molecular charge migration (CM) in a carbon-chain molecule using a high harmonic spectroscopy (HHS) method. By reconstructing the CM dynamics at the most fundamental level, the team achieved a temporal resolution of 50 attoseconds and quantified the CM speed to be several angstrom per femtosecond. The study provides valuable insights into CM dynamics in molecules and opens up possibilities for manipulating chemical reactions by controlling CM speed through molecular alignment.

via Phys.org|

#chemical-reactions #electron-dynamics #high-harmonic-spectroscopy

science-and-technology2 years ago•3 min saved

Quantum Material Enables High-Power Coherent Microwave Source.

An international team of researchers, led by the University of Geneva, has developed a quantum material that allows the curvature of the space inhabited by electrons to be controlled. The material, which was created using an advanced system for fabricating materials on an atomic scale, holds promise for future electronic devices, particularly in the field of optoelectronics. The researchers believe that this new material opens up new avenues in the exploration of very high-speed electromagnetic signal manipulation and can also be used to develop new sensors.

via SciTechDaily|

#electron-dynamics #high-speed-communication #optoelectronics