Navigation Links
Under pressure: Germanium
Date:4/6/2011

Washington, D.C. Although its name may make many people think of flowers, the element germanium is part of a frequently studied group of elements, called IVa, which could have applications for next-generation computer architecture as well as implications for fundamental condensed matter physics.

New research conducted by Xiao-Jia Chen, Viktor Struzhkin, and Ho-Kwang (Dave) Mao from Geophysical Laboratory at Carnegie Institution for Science, along with collaborators from China, reveals details of the element's transitions under pressure. Their results show extraordinary agreement with the predictions of modern condensed matter theory.

Germanium (atomic number 32) is used in fiber-optic systems, specialized camera and microscope lenses, circuitry, and solar cells. Under ambient conditions it is brittle and semiconducting. But under pressure, the element should exhibit superconductivity, meaning that there is no resistance to the flow of an electric current.

The team's research, published in Physical Review Letters, discovered that under pressure of 66 GPa (about 650,000 atmospheres), germanium undergoes a structural change from one type of solid material to another that is metallicmeaning it conducts electricity. It then undergoes another structural change under pressure of 90 GPa (about 890,000 atmospheres). These findings matched theoretical predictions about the element's behavior under extreme pressure.

"A series of phase transitions was observed on compression of germanium that creates structures with increased density," Chen said. "We found extraordinary agreement between theory and experiment for the structures, energies, and compressional behavior. Though some of this behavior had been noted earlier, the agreement between the new highly accurate experimental results and theory really was quite remarkable."

The team's results show that superconductivity in this simple element is caused by phonons, or collective vibrations in the crystal structures that germanium assumes under pressure.


'/>"/>

Contact: Xiaojia Chen
x.chen@gl.ciw.edu
Carnegie Institution
Source:Eurekalert

Related biology technology :

1. StollerUSA Launches Bio-Forge.com to Offer Solutions for Crops Under Stress
2. CV Therapeutics Reports Option Grants Under Nasdaq Marketplace Rule 4350
3. Understanding the science of solar-based energy: more researchers are better than one
4. Genesis Pharmaceuticals Completes Reverse Stock Split and Will Trade Under a New Symbol
5. Neptune Krill Oil, NKO(R), enters WALGREENS, the largest U.S. retail pharmacy chain, under the brand name Schiff(R) MegaRed(TM)
6. Microchip Biotechnologies, Inc. Awarded Contract Under US Army Commercialization Pilot Program
7. New Report on 633 Biotechnology Medicines Under Development Released in Michigan
8. LI-COR Biosciences Offers $1.75 Million in Matching Funds for Undergraduate Genomics Education
9. Lumiphore Partners with Biophor Diagnostics, Inc. to Develop Tests for Drugs of Abuse; Appoints Ibis Biosciences Founder David J. Ecker to Board
10. SENOMYX CO-FOUNDER AND SCIENTIFIC ADVISORY BOARD MEMBER ROGER TSIEN, PH.D., AWARDED NOBEL PRIZE IN CHEMISTRY
11. Boston Scientific Provides Update on Involuntary Selling of Its Stock by Co-Founders
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/22/2017)... ... February 22, 2017 , ... LabRoots , the leading ... the world, is pleased to announce the 2nd annual Precision Medicine Virtual Conference. ... online-only conference focused on the development and advancements in precision medicine. , Precision ...
(Date:2/22/2017)... MOINES, Iowa , Feb. 22, 2017 Origin (Origin ... agricultural biotechnology trait and seed provider, and Arcadia ... -based company that develops and commercializes agricultural productivity traits and nutritional ... a key corn biotechnology product developed in China ... of global regulatory trials. ...
(Date:2/22/2017)... ... February 22, 2017 , ... Pharma and biotech consulting firm ... director. Operating from Pennside’s Zurich headquarters, Pennside Partners, GmbH, Mr. Perkins brings 14 ... more than a decade with leading market research firm, GfK. He began his ...
(Date:2/21/2017)... 21, 2017 Synthetic Biologics, Inc. (NYSE MKT: ... microbiome to protect and restore the health of patients, intends to ... 31, 2016 on Thursday, March 2, 2017, and to host a ... information for the call is as follows: U.S. (toll ... ...
Breaking Biology Technology:
(Date:2/21/2017)... PORTLAND, Ore. , Feb. 22, 2017  IBM ... Companies (Avamere Health Services, Infinity Rehab, Signature Hospice, Home ... that will apply the power of IBM cognitive computing ... health centers. By analyzing data streaming from sensors in ... physical and environmental conditions, and obtain deeper learnings into ...
(Date:2/13/2017)... WASHINGTON , Feb. 13, 2017 Former ... U.S. Senate Judiciary Committee, Janice Kephart of ... regarding President Donald Trump,s "Executive Order: Protecting ... States" (Jan. 27, 2017):  "As President Trump,s ... 9th Circuit has now essentially banned the travel ban, ...
(Date:2/8/2017)... Feb. 7, 2017 Report Highlights ... The global synthetic-biology market ... billion by 2021, growing at a compound annual growth rate ... overview of the global markets for synthetic biology. - Analyses ... 2016, and projections of compound annual growth rates (CAGRs) through ...
Breaking Biology News(10 mins):