News tagged with phonons
Research Highlights Potential for Improved Solar Cells
Nanotechnology / Nanomaterials
Feb 10, 2009 |
4.5 / 5 (13) |
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(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
Sep 22, 2009 |
4.5 / 5 (8) |
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(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
Jun 03, 2008 |
3.6 / 5 (13) |
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
Nov 21, 2008 |
4.4 / 5 (30) |
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(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
Dec 20, 2007 |
4.6 / 5 (61) |
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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
Jun 17, 2009 |
4.8 / 5 (22) |
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
Dec 03, 2007 |
4.3 / 5 (69) |
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“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
Oct 15, 2007 |
4.2 / 5 (26) |
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
Feb 26, 2007 |
4.6 / 5 (28) |
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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
Jun 17, 2008 |
4.3 / 5 (25) |
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“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 ...
New Wrinkle in the Mystery of High-Tc Superconductors
Physics /
Mar 16, 2006 |
3.9 / 5 (11) |
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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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