Most laptop users notice it skin deep: when you place your mobile companion on your lap and go surfing the internet for a while, the computer gets really warm. For the average user this may not seem such a big deal. But heating really poses a problem for the semiconductor industry, because heat development severely limits the development of future generations of chips - and thus of laptops, and PC's in general.
The market demands ever improving performance from chips and computer. To satisfy this demand, more and more transistors must be crammed into the same surface area, and when an electrical current it applied to these transistors, they produce considerable heat. "To increase the speed of a computer, one must increase the amount of current flowing through its chips, thus increasing the side effect of heating" explains Prof. Hartmut Buhmann, responsible for the team conducting the research. "This may bring about so much heat that temperature becomes the limiting factor in performance." Actually, high performance computers already today use water cooling to deal with this issue.
"The techniques that we have recently discovered here in Wuerzburg could alleviate the issue of chips overheating" says Prof. Laurens W. Molenkamp, head of the chair for experimental physics III: "Using the quantum spin Hall effect which we for the first time have demonstrated here, it is possible to transport and manipulate information without energy loss." This means that a future computer could operate extremely fast without losing its cool!
For discoveries in this vein, Wuerzburg University appears to be the place to be. 25 years earlier, at the same chair, then headed by Gottfried Landwehr, Klaus von Klitzing made the discovery of the (charge) quantum Hall effect, which determines the Hall resistance of a semiconductor field effect transistor in a strong magnetic field, and for which he was awarded the Nobel prize for physics in 1985.Further information:
Prof. Dr. Laurens Molenkamp, ++49 (931) 888-4925, email@example.com
Markus König1, Steffen Wiedmann1, Christoph Brüne1, Andreas Roth1, Hartmut Buhmann1, Laurens W. Molenkamp1, Xiao-Liang Qi2, and Shou-Cheng Zhang2: "Quantum Spin Hall Insulator State in HgTe Quantum Wells", Science, published online on September 20, 2007, DOI: 10.1126/science.1148047
1Physikalisches Institut (Lehrstuhl für Experimentelle Physik III), Universität Würzburg, D-97074 Würzburg, Germany
2Department of Physics, McCullough Building, Stanford University, Stanford, CA 94305-4045, USA
Robert Emmerich | idw
Move over, lasers: Scientists can now create holograms from neutrons, too
21.10.2016 | National Institute of Standards and Technology (NIST)
Finding the lightest superdeformed triaxial atomic nucleus
20.10.2016 | The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
21.10.2016 | Health and Medicine
21.10.2016 | Information Technology
21.10.2016 | Materials Sciences