Black holes 'preceded galaxies'

Astronomers believe they have solved a cosmic chicken-and-egg question: what came first - black holes or galaxies?

news.bbc.co.uk

Heat may spark world food crisis

Half the world's population could face food crisis by 2100 as soaring temperatures cripple staple crops, scientists warn.

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Earth Watch

Why it is hard to predict sudden environmental crises

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Mummy of female pharaoh uncovered

Egyptologists find remains of a mummy thought to belong to a queen who ruled 4,300 years ago, Egypt's antiquities chief announced.

news.bbc.co.uk

Our writers talk back

Some of the previous contributors to the Green Room respond to readers' questions and comments.

news.bbc.co.uk

Canadians claim South Pole record

A trio of Canadians claim a new record for the fastest trek across Antarctica to the South Pole.

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Zimbabwe troops 'eat elephants'

A Zimbabwean wildlife campaigner tells the BBC that soldiers are being given elephant meat to eat, as the economic crisis deepens.

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First flight of algae-fuelled jet

Continental Airlines is the latest to test fly a jet biofuel, this time with a product derived partially from algae.

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Holes give edge to new armour

Scientists from the UK Ministry of Defence (MoD) have devised ultra-hard vehicle armour to protect military personnel.

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Panda bites his third tourist in two years at Beijing zoo

A panda at Beijing zoo bites a man for the third time in two years.

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Mosquitoes make sweet love music

Sexy songs sung by mosquitoes in courtship could be key to curbing the spread of dengue fever, say scientists.

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Everest trip helps critically ill

Blood oxygen levels recorded on a trip by medics to Everest could help the treatment of critically ill patients.

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A deep-sea fish caught in the Pacific has mirrors for eyes

A deep-sea fish caught in the Pacific has eyes which use mirrors as well as lenses, scientists discover.

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US vows 'huge' marine protection

The US is to establish "the largest area of protected sea in the world", banning fishing and mining, around its Pacific islands.

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Beagle hunter

On a mission to find the most famous ship of science

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Animal matters

Scotland's debate over tests on primates

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'Wolfman' returns

Explorer Jim McNeill tracks down Arctic wolves

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Feilden's blog

Ground-breaking new technique in stem cell science

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China alert over bird flu death

Chinese authorities shut down and clean poultry markets in Hebei province, after the first human death in nearly a year.

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Body repair 'could be ramped up'

A combination of drugs could trick the body into sending its repair mechanisms into overdrive, say scientists.

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Baby Jupiter's huge weight gain

The planet Jupiter must have gained mass fast during its infancy, according to astronomers.

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Venomous mammal caught on camera

Rare footage of one of the world's most strange and elusive mammals is captured by scientists.

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Eat it or lose it - why centuries of crop diversity are at risk

Centuries of crop diversity are at risk of being lost forever as farmers turn to just a few modern, high yielding varieties.

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Tech fair offers greener vision

Analysts at the Consumer Electronics Show say green credentials of tech products will become critical to success.

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Poetry or science?

Is romantic love just a chemical cocktail?

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 Science > Physics > Condensed Matter > Semiconductors

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Science > Physics > Condensed Matter > Semiconductors

Semiconductors:

Bell Labs: Quantum Cascade Laser

Introductory information on this new type of semiconductor laser by the people who invented the Quantum Cascade Laser in 1994.

http://www.bell-labs.com/org/physicalsciences/projects/qcl/qcl.html

Britney's Guide to Semiconductor Physics

Semiconductor physics with a bias towards semiconductor lasers.

http://britneyspears.ac/lasers.htm

Principles of Semiconductor Devices

Electronic text on the principles of semicondcutor devices.

http://ece-www.colorado.edu/~bart/book/book/title.htm

Graand

Free Classified Ads Portal

www.graand.com

Semiconductor physics: research and publications

Recent progress in semiconductor physics, focussing on two-dimensional electron systems (2DESs), the fractional quantum Hall effect (FQHE), and superlattices (SLs). A new field-effect transistor is described, fabricated by molecular beam epitaxy and cleaved-edge overgrowth.

http://www.rainer-deutschmann.de

Semiconductors

Program and database for multifrequency absorption spectra of semiconductors and dielectrics.

http://spectra.at.tut.by/

Universität Leipzig: Semiconductor Physics Group

Research on nanotechnology and self-assembling techniques for novel materials and devices based on atomic monolayers, quantum wires and quantum dots.

http://www.uni-leipzig.de/~hlp/

University of Graz: Spintronics Research

Publications and description of spin and charge transport in semiconductors and spin relaxation in metals.

http://physik.kfunigraz.ac.at/~jaf/research/spintronics/spintronics.html

What are Semiconductors?

A workshop module on scientific principles, resources and references on semiconductors.

http://matse1.mse.uiuc.edu/~tw/sc/sc.html

WinGreen - Simulation Package

WinGreen is a quantum transport simulation package for layered semiconductors. Free download.

http://www.fz-juelich.de/isg/mbe/software.html