News tagged with phonons


Research Highlights Potential for Improved Solar Cells

Nanotechnology / Nanomaterials

created Feb 10, 2009 | popularity 4.5 / 5 (13) | comments 0

(PhysOrg.com) -- A team of Los Alamos researchers led by Victor Klimov has shown that carrier multiplication—when a photon creates multiple electrons—is a real phenomenon in tiny semiconductor crystals and not a false observation ...





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Computation helps predict heat transfer in diamond

Physics / Condensed Matter

created Sep 22, 2009 | popularity 4.5 / 5 (8) | comments 0

(PhysOrg.com) -- Cornell researcher Derek Stewart and collaborators have calculated the exact mechanism by which diamond conducts heat, a breakthrough that could lend insight into many fields, including electronics.


Nanotech: Hot Technology Gets a Cool Down

Nanotechnology / Nanophysics

created Jun 03, 2008 | popularity 3.6 / 5 (13) | comments 0

It’s the hottest technology – featherweight laptops that feature rapid response, crisp graphics and operate complex computer games; slim cell phones with Web-browsing capabilities, store high resolution photos and keep track ...


Scientists See New Mechanism for Superconductivity

Scientists See New Mechanism for Superconductivity

Physics / General Physics

created Nov 21, 2008 | popularity 4.4 / 5 (30) | comments 4

(PhysOrg.com) -- Los Alamos National Laboratory researchers have posited an explanation for superconductivity that may open the door to the discovery of new, unconventional forms of superconductivity.


The Quest for a New Class of Superconductors

The Quest for a New Class of Superconductors

Physics / General Physics

created Dec 20, 2007 | popularity 4.6 / 5 (61) | comments 5

Fifty years after the Nobel-prize winning explanation of how superconductors work, a research team from Los Alamos National Laboratory, the University of Edinburgh and Cambridge University are suggesting another ...


A sonic boom in the world of lasers

Physics / Optics & Photonics

created Jun 17, 2009 | popularity 4.8 / 5 (22) | comments 6

It was an idea born out of curiosity in the physics lab, but now a new type of ‘laser’ for generating ultra-high frequency sound waves instead of light has taken a major step towards becoming a unique and highly useful 21st ...


Analog of cosmological particle creation

Physics / General Physics

created Dec 03, 2007 | popularity 4.3 / 5 (69) | comments 6 feature

“In cosmology there’s this quantum effect,” Ralf Schützhold tells PhysOrg.com. “In the universe, there is a ground state, where it is empty. But if the universe starts to expand or contract, the vacuum is distorted, no lon ...


Good vibrations in nanotube research

Good vibrations in nanotube research

Nanotechnology / Nanophysics

created Oct 15, 2007 | popularity 4.2 / 5 (26) | comments 0

IBM scientists have measured distribution of electrical charges in tubes of carbon that measure less than 2 nanometers in diameter, 50,000 times thinner than a strand of human hair. The technique provides ...


New insights into high-temperature superconductors

Physics / General Physics

created Feb 26, 2007 | popularity 4.6 / 5 (28) | comments 0

Scientists at the Carnegie Institution's Geophysical Laboratory in collaboration with a physicist at the Chinese University of Hong Kong have discovered that two different physical parameters —pressure and the substitution ...


Developing better nano-electronics by understanding nonadiabatic effects

Physics / General Physics

created Jun 17, 2008 | popularity 4.3 / 5 (25) | comments 2 feature

“Basically,” Michele Lazzeri tells PhysOrg.com, “the Born-Oppenheimer adiabatic approximation tells us how atoms are vibrating.” This adiabatic effect is used to describe phonons, which are modes of vibration that have b ...


Tonica Valla

New Wrinkle in the Mystery of High-Tc Superconductors

Physics /

created Mar 16, 2006 | popularity 3.9 / 5 (11) | comments 0

In the twenty years since the discovery of high-temperature (Tc) superconductors, scientists have been trying to understand the mechanism by which electrons pair up and move coherently to carry electrical current ...



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