Navigation Links
A deeper look at interfaces
Date:1/15/2014

n two waves of identical wavelength interfere with one another: one is the incident x-ray and the other is the x-ray reflected by a mirror. Interactions between standing waves and core-level electrons reveal much about the properties of each atomic species in a sample. ARPES from the outer valence levels is the long-standing spectroscopic workhorse for the study of electronic structure. X-rays striking a material surface or interface cause the photoemission of electrons at angles and kinetic energies that can be measured to obtain detailed electronic energy levels of the sample. While an extremely powerful tool, ARPES, a soft x-ray technique, is primarily limited to the study of near-surface atoms. It's harder x-ray cousin, HARPES, makes use of more energetic x-rays to effectively probe subsurface interfaces, but the addition of the standing wave capability provides a much desired depth selectivity.

"The standing wave can be moved up and down in a sample simply by rocking the angle of incidence around the Bragg angle of the mirror," says Alexander Gray, a former member of Fadley's UC Davis research group and affiliate with Berkeley Lab's Materials Sciences Division, who is now a postdoctoral associate at Stanford/SLAC. "Observing an interface between a ferromagnetic conductor (lanthanum strontium manganite) and an insulator (strontium titanate), which constitute a magnetic tunnel junction used in spintronic logic circuits, we've shown that changes in the electronic structure can be reliably measured, and that these changes are semi-quantitatively predicted by theory at several levels. Our results point to a much wider use of SWARPES in the future for studying the electronic properties of buried interfaces of many different kinds."


'/>"/>
Contact: Lynn Yarris
lcyarris@lbl.gov
510-486-5375
DOE/Lawrence Berkeley National Laboratory
Source:Eurekalert  

Page: 1 2

Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
A deeper look at interfaces
(Date:3/4/2015)... 2015 Research and Markets ( ... PharmaBiotech,s new report "Biomarkers - Technologies, Markets ... This report follows the broad definition of ... objectively measured and evaluated as an indicator of ... pharmacological responses to a therapeutic intervention. Tests based ...
(Date:3/4/2015)... Calif. , March 4, 2015 ... a specialty pharmaceutical company focused on the development ... of acute and breakthrough pain, today announced that ... financial results after market close on Monday, March ... conference call at 4:30 p.m. Eastern Time (1:30 ...
(Date:3/4/2015)... -- Lancée par l,Assistance Publique ... en décembre 2011, l,étude collaborative française randomisée et ...   l es microsphères en résine marquées ... carcinome hépatocellulaire avancé, a recruté plus de 400 ... ; les résultats sont attendus fin 2016.   ...
(Date:3/3/2015)... (PRWEB) March 03, 2015 Experts and ... schedules for one event: the Alltech REBELation exploring innovation, ... May 17-20. Now in its 31st year, Alltech’s annual ... 70 countries, and the opportunity to join the REBELation ... 7 at 11:59 p.m. EST, at which point the ...
Breaking Biology Technology:Global Biomarkers Report 2014-2024 - Technologies, Markets and Companies 2Global Biomarkers Report 2014-2024 - Technologies, Markets and Companies 3AcelRx Pharmaceuticals to Hold Annual 2014 Financial Results Conference Call and Webcast on Monday, March 9th, 2015 2AcelRx Pharmaceuticals to Hold Annual 2014 Financial Results Conference Call and Webcast on Monday, March 9th, 2015 3Traitement du cancer primitif du foie : Recrutement terminé pour l'étude SARAH et résultats attendus fin 2016 2Traitement du cancer primitif du foie : Recrutement terminé pour l'étude SARAH et résultats attendus fin 2016 3Traitement du cancer primitif du foie : Recrutement terminé pour l'étude SARAH et résultats attendus fin 2016 4Traitement du cancer primitif du foie : Recrutement terminé pour l'étude SARAH et résultats attendus fin 2016 5Traitement du cancer primitif du foie : Recrutement terminé pour l'étude SARAH et résultats attendus fin 2016 6World-renowned Leaders, Authors and Businesspeople Join the Alltech REBELation 2World-renowned Leaders, Authors and Businesspeople Join the Alltech REBELation 3World-renowned Leaders, Authors and Businesspeople Join the Alltech REBELation 4
... 18 Novavax, Inc. (Nasdaq: NVAX ) a ... and Chief Executive Officer, will be presenting at the Phacilitate ... 23, 2009 at The Fira Palace, Barcelona, Spain. Dr. ... VLP based vaccines helping to shape the manufacturing processes of ...
... (NYSE: BSX ) is scheduled to participate in ... 24. , , Jim Tobin, President and Chief Executive ... beginning at approximately 9:00 a.m. E.T. Following the presentation, ... join Mr. Tobin in a question and answer session. , ...
... ,Funding Biopharma: Strategies for Reaching Investors in a Financial ... , BASKING RIDGE, N.J., June 18 Biotech companies ... with half of the industry,s 370 small-cap funds slated ... executives and investment market leaders concluded during a life ...
Cached Biology Technology:Novavax CEO to Present at Phacilitate Vaccine Forum Barcelona 2009 2Life Science Leaders Discuss Strategies for Surviving the Financial Crisis at Yankee Public Relations Symposium 2Life Science Leaders Discuss Strategies for Surviving the Financial Crisis at Yankee Public Relations Symposium 3Life Science Leaders Discuss Strategies for Surviving the Financial Crisis at Yankee Public Relations Symposium 4Life Science Leaders Discuss Strategies for Surviving the Financial Crisis at Yankee Public Relations Symposium 5
(Date:3/4/2015)... , Mar. 04, 2015 Research and ... the addition of the "Global Biometrics Market ... offering. The market for biometric authentication ... of around 14% till 2020 The ... be increasing security needs, government projects and constant ...
(Date:3/3/2015)... , March 3, 2015 ... provider of advanced cryogenic logistics solutions for ... immunotherapies, stem cells, cell lines, clinical research ... medicine, today announced the expansion of its ... Centers, ("Fred Hutch") Clinical Research Division ...
(Date:3/2/2015)... , March 2, 2015 Synaptics ... developer of human interface solutions, today announced a ... is designed to enable rapid and secure transactions ... module for gaming is a turnkey solution providing ... ability to quickly integrate fingerprint ID solutions into ...
Breaking Biology News(10 mins):Global Biometrics Market Forecast and Opportunities, 2020 2Global Biometrics Market Forecast and Opportunities, 2020 3Cryoport, Inc. Expands Support of Fred Hutchinson Cancer Research Center's Clinical Research Division 2Cryoport, Inc. Expands Support of Fred Hutchinson Cancer Research Center's Clinical Research Division 3Synaptics Unveils New Fingerprint ID Solution for Gamers 2Synaptics Unveils New Fingerprint ID Solution for Gamers 3
... million in U.S. dollars have been awarded to ... studies related to asthma and other immune system ... extramural grants were awarded by the Biomedical Research ... and Research), the government agency driving Singapore,s transformation ...
... Gary G. Borisy, director and CEO of the MBL ... Academy of Sciences (NAS), an honorific society of distinguished ... considered one of the highest honors in American science ... annual meeting in Washington, D.C. Dr. Borisy is one ...
... of mutually beneficial arrangements between organismslike the relationship ... sometimes these blissful relationships have a dark side, ... article for the May issue of The ... ants and plants is a great example of ...
Cached Biology News:Alzheimer's, asthma, cancer, malaria and TB focus of new Singapore grants 2Alzheimer's, asthma, cancer, malaria and TB focus of new Singapore grants 3Alzheimer's, asthma, cancer, malaria and TB focus of new Singapore grants 4MBL director and CEO and cell biology pioneer Gary Borisy elected to National Academy of Sciences 2MBL director and CEO and cell biology pioneer Gary Borisy elected to National Academy of Sciences 3When industrious ants go too far 2
... The Rotofor purification system with PowerPac ... for protein separation and purification by liquid-phase ... the mini (18 ml) and standard (60 ... finger, electrode chambers, PowerPac 3000 power supply, ...
... The Bio-Rad Molecular Imager VersaDoc MP ... quantitative CCD based imaging system capable ... detection methods, including fluorescence, chemiluminescence, densitometry, ... Blue illumination sources allow imaging of ...
...
...
Biology Products: