Navigation Links
Physicists pin down spin of surface atoms
Date:9/13/2007

not incorporated into it.

Crommie, UC Berkeley post-doctoral fellow Yossi Yayon and graduate student Victor W. Brar succeeded by creating islands of cobalt atoms on a cold copper substrate (4.8 Kelvin, or -451 degrees Fahrenheit) and sprinkling these islands with atoms of either iron or chromium.

Employing a relatively new technique called low-temperature spin-polarized scanning tunneling spectroscopy - essentially a scanning, tunneling microscope that can probe the spin and energy-dependent electron density of a surface - they were able to determine the spin of isolated adatoms atop these cobalt nanoislands.

"These magnetic islands are teeny tiny nanomagnets, but from the single-atom perspective they are just large fixed ferromagnets, like a refrigerator magnet," Crommie said. "We took individual atoms and coupled them to these large magnets so we could fix the direction of the spin of an atom and it would stay put."

Crommie's CCMS colleagues, Steve C. Erwin and post-doctoral fellow Laxmidhar Senapati, calculated that in such a situation, iron atoms would assume a spin state parallel to the spins of the atoms in the cobalt island, while chromium would assume an anti-parallel spin, which is exactly what the researchers found.

How spins couple to one another is an important question for a quantum computer, because in a practical device, the spin of an atom would be quantum mechanically intermingled or "entangled" with the spin of other atoms, manipulated in some sort of calculation, and then disentangled to obtain the result. Understanding such interactions also are critical in spintronic devices, where the spin of atoms is used to control the flow of spin-polarized electrons in a circuit.

"We are clearly not yet in a useful regime for quantum computation because the spins we are looking at are very strongly coupled to the environment," Crommie said. "Nevertheless, this measurement is very useful because it shows
'/>"/>

Contact: Robert Sanders
rsanders@berkeley.edu
510-643-6998
University of California - Berkeley
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Detection of antibody-stained cell surface and intracellular protein targets with the Agilent 2100 bioanalyzer
2. Microbial Diversity in Ground and Surface Water Analyzed by Denaturing Gradient Gel Electrophoresis Using the DCode System
3. Unique Surface Treatment of Novel TSK-GEL ODS Columns Provide Separation of Aqueous and Fat Soluble Vitamins
4. Fisher Biosciences contracts with Madison-based GenTel BioSurfaces
5. Nanotech Students Offer High End Surface Analysis
6. GenTel BioSurfaces launches new assay platform
7. Engineers chart semiconductors on the scale of atoms
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/15/2014)... Sept. 15, 2014   Global Science & ... scientific products and services for satellite and weather ... for Integrated Services (OASIS) from the General Services ... selected to provide the government best-value solutions for ... (SB) category in Pool 4. The OASIS SB ...
(Date:9/15/2014)... University have developed a technique for controlling the surface ... opening the door to a new generation of reconfigurable ... on the fact that the oxide "skin" of the ... acts as a surfactant, lowering the surface tension between ... used a liquid metal alloy of gallium and indium. ...
(Date:9/15/2014)... September 15, 2014 Bioptigen ... imaging OCT system for the optical device metrology and ... EnvisuTM S4410 SDOCT for Contact Lens Metrology is ... and high complexity contact lens, IOL structures, and donor ... a complete contact lens immersed in a hydration bath ...
(Date:9/15/2014)... Texas , Sept. 15, 2014 The chemistry, ... in climate, says a new article published by the nonprofit ... , PhD, on climate change and its effects on the ... of an extensive study conducted by Dr. Ahmed in the ... China and has implications for the future of ...
Breaking Biology Technology:Global Science & Technology, Inc. Awarded GSA OASIS Small Business Contract 2Global Science & Technology, Inc. Awarded GSA OASIS Small Business Contract 3Researchers control surface tension to manipulate liquid metals 2Bioptigen Introduces Deep Imaging OCT System for Contact Lens Metrology 2Tea Taste and Quality Affected by Climate Change 2Tea Taste and Quality Affected by Climate Change 3Tea Taste and Quality Affected by Climate Change 4
... /Xinhua-PRNewswire-FirstCall/ --,Kiwa Bio-Tech Products Group Corporation (OTC Bulletin ... products sold during the fourth,quarter of 2007 strengthened ... over the same period in the previous year., ... is a joint-venture of Kiwa,and Tianjin Challenge Feed ...
... Tengion Inc., a clinical,stage regenerative medicine company ... today that Steven Nichtberger, M.D.,President and Chief Executive ... Pharmaceutical, Biotechnology and Medical Device Conference on,Tuesday, February ... will be held at,the Grand Hyatt Hotel in ...
... Inc. (OTC Bulletin Board: CARN) said it retained,Milkie/Ferguson ... it in,exploring a range of financial alternatives., ... continuation of our efforts to,thoroughly consider our business ... PhD, chief executive officer of Carrington.,"We have valuable ...
Cached Biology Technology:Kiwa Bio-Tech Animal Feed Volume Increased 25% in Fourth Quarter of 2007 2Carrington Retains Milkie/Ferguson to Explore Financial Alternatives 2
(Date:9/16/2014)... certain traits from our parents that are pre-determined. But ... out by taking certain drugs or better yet, just ... of researchers at the Boston University School of Medicine ... , Epigenetics regulates gene expression in a reversible ... prevent permanent mutations or alterations within the gene themselves. ...
(Date:9/16/2014)... us sick can take up residence in and on ... other troublesome symptom, according to new research at Washington ... On average, healthy individuals carry about five types of ... BioMed Central Biology . The study is the ... in healthy people. , The research was conducted ...
(Date:9/16/2014)... has its own bacterial identity. That,s the conclusion of ... who studied the genetic fingerprints of bacteria on 57 ... "This study demonstrates for the first time that host ... strategies possess very different microbial communities on their leaves," ... researcher in the UO,s Institute of Ecology and Evolution ...
Breaking Biology News(10 mins):Epigenetic drugs: A hope to treat cancer resistance and reduce cancer relapse? 2Epigenetic drugs: A hope to treat cancer resistance and reduce cancer relapse? 3Healthy humans make nice homes for viruses 2Healthy humans make nice homes for viruses 3Microbiome research shows each tree species has a unique bacterial identity 2
... how compound word formation is influenced by subtle forms ... to the speakers of a language have a higher ... words are subject to selection pressures that play a ... language over time. The study, "Grammars leak: Modeling ...
... ARLINGTON, Va.Underscoring the importance of alternative energy for the ... Corps Base Hawaii Dec. 7 to learn about possible ... Research (ONR)-funded fuel cell vehicles (FCV) and high-efficiency trash ... the 70th anniversary of the Pearl Harbor attack, was ...
... bees and brains made up of neurons make decisions using ... 9 issue of Science . In previous work, ... a honeybee swarm perform "waggle dances" to prompt other scout ... In the new study, Seeley, a professor of ...
Cached Biology News:Survival of the fittest: Linguistic evolution in practice 2New energy sources fuel interest from Secretary of the Navy 2
IgD Chain C (AMS 9.1)...
Bethyl Laboratories packages antibodies, conjugates and calibrators to provide quantitative ELISA kits. Each kit contains the following components, sufficient for 1000 single well assays....
quantitation of phosphatase activity, evaluation of hits and leads from HTS...
... 9001:2000 Certified USDA Research Registered OLAW Assured ... Training AALAS Certified Technicians Documentation ... Documentation Upon Request Focus CRP ... all your custom immunology service needs. ...
Biology Products: