Navigation Links
Study of electron orbits in multilayer graphene finds unexpected energy gaps
Date:8/10/2010

"Our findings hold the first indications of a small position-dependent interaction between the layers," said David L. Miller, the paper's first author and a graduate student in First's laboratory. "This interaction occurs only when the size of a cyclotron orbit which shrinks as the magnetic field is increased becomes smaller than the size of the observed patches."

The origin of the position dependent interaction is believed to be the "moir pattern" of atomic alignments between two adjacent layers of graphene. In some regions, atoms of one layer lie atop atoms of the layer below, while in other regions, none of the atoms align with the atoms in the layer below. In still other regions, half of the atoms have neighbors in the underlayer, an instance in which the symmetry of the carbon atoms is broken and the Landau level discrete energy level of the electrons splits into two different energies.

Experimentally, the researchers examined a sample of epitaxial graphene grown at Georgia Tech in the laboratory of Professor Walt de Heer, using techniques developed by his research team over the past several years.

They used the tip of a custom-built scanning-tunneling microscope (STM) to probe the atomic-scale electronic structure of the graphene in a technique known as scanning tunneling spectroscopy. The tip was moved across the surface of a 100-square nanometer section of graphene, and spectroscopic data was acquired every 0.4 nanometers.

The measurements were done at 4.3 degrees Kelvin to take advantage of the fact that energy resolution is proportional to the temperature. The scanning-tunneling microscope, designed and built by Joseph Stroscio at NIST's Center for Nanoscale Science and Technology, used a superconducting magnet to provide the magnetic fields needed to study the orbits.

According to First, the study raises a number of questions for future research, including how the energy gaps will affect electron t
'/>"/>

Contact: John Toon
jtoon@gatech.edu
404-894-6986
Georgia Institute of Technology Research News
Source:Eurekalert  

Page: 1 2 3 4

Related biology technology :

1. Terrorist de-radicalization shows promise, comprehensive study finds
2. Vicept Therapeutics Announces Positive Clinical Study Results of V-101 for the Treatment of the Erythema of Rosacea
3. New Study Demonstrates Clinical Validity of EarlyCDT-Lung™
4. YM BioSciences announces conclusion of Phase I dose-escalation and expansion of ongoing CYT387 Phase I/II clinical study
5. Aeterna Zentaris Announces NIH Grant for a Phase 1/2 Study in Advanced Prostate Cancer with AEZS-108
6. DAIICHI SANKYO EUROPE GmbH Selects DATATRAK eClinical™ for Pan-European Systolic Hypertension Study
7. New England Journal of Medicine Publishes Data from Pivotal Phase 3 PROVENGE IMPACT Study
8. Angiotech Pharmaceuticals and partner Athersys announce positive results from phase I study of MultiStem(R) in heart attack patients
9. Aegera Therapeutics Reports Survival Data from the Phase 1 Portion of its Phase 1-2 Study of AEG35156 in Combination with Sorafenib in Patients with Advanced Hepatocellular Carcinoma
10. Study measures single-molecule machines in action
11. Recent Study Reports Reveals that HGH May Aid Performance
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Study of electron orbits in multilayer graphene finds unexpected energy gaps
(Date:7/28/2015)... ... July 28, 2015 , ... In terms of value, aluminium ... production volume reached close to 1.84 million tonnes in the same year. As ... of the region’s total aluminium hydroxide production; the country’s aluminium hydroxide production posted ...
(Date:7/28/2015)... , ... July 28, 2015 , ... VetStem Biopharma will ... stem cell credentialing course to local area veterinarians. , The tour and course will ... units at no charge) at VetStem’s Poway facility. Staff members are welcome to attend ...
(Date:7/28/2015)...  Kerastem Technologies announce that the Company has received ... For Biologics Evaluation and Research (CBER) Office of Cellular, ... investigating the safety and feasibility of the Company,s technology ... baldness (androgenic alopecia). The phase II study, ... in Europe and ...
(Date:7/28/2015)... 2015 CSL Behring announced today ... for review the company,s Biologics License Application (BLA) for ... the treatment of hemophilia A. In the pivotal clinical ... Hemophilia A is a congenital bleeding disorder ... affected patients are male. People with hemophilia A may ...
Breaking Biology Technology:EU27 Aluminium Hydroxide Market Analysed and Forecast by BAC Reports in New Research Study Available at MarketPublishers.com 2EU27 Aluminium Hydroxide Market Analysed and Forecast by BAC Reports in New Research Study Available at MarketPublishers.com 3VetStem Biopharma weekly veterinary continuing education classes and GMP manufacturing facility tour 2Kerastem Receives Conditional Approval from FDA for Alopecia Trial 2U.S. FDA Accepts for Review CSL Behring's Biologics License Application for Its Novel rVIII-SingleChain Therapy for Patients with Hemophilia A 2U.S. FDA Accepts for Review CSL Behring's Biologics License Application for Its Novel rVIII-SingleChain Therapy for Patients with Hemophilia A 3
... HIFU Revenue ... FY2007 Annual Targets Under Review, BEIJING, ... (Nasdaq: CMED ), a leading China-based,medical device company ... and high intensity focused ultrasound tumor,therapy system, today announced ...
... LAKE CITY, Aug. 27 ARUP Laboratories, a ... leader in,innovative laboratory research and development, announced today ... with Premier Purchasing,Partners, L.P., one of the nation,s ... systems. The agreement extends a previous,contract between ARUP ...
... IDM Pharma (Nasdaq:,IDMI) today announced that Jeffrey W. ... Medical Officer and Senior Vice President,of Research and Development. ... report to President and CEO Timothy P. Walbert. ... experience to,IDM Pharma and will lead the regulatory and ...
Cached Biology Technology:China Medical Technologies Reports First Quarter Financial Results 2China Medical Technologies Reports First Quarter Financial Results 3China Medical Technologies Reports First Quarter Financial Results 4China Medical Technologies Reports First Quarter Financial Results 5China Medical Technologies Reports First Quarter Financial Results 6China Medical Technologies Reports First Quarter Financial Results 7China Medical Technologies Reports First Quarter Financial Results 8China Medical Technologies Reports First Quarter Financial Results 9China Medical Technologies Reports First Quarter Financial Results 10China Medical Technologies Reports First Quarter Financial Results 11China Medical Technologies Reports First Quarter Financial Results 12China Medical Technologies Reports First Quarter Financial Results 13China Medical Technologies Reports First Quarter Financial Results 14ARUP Laboratories and Premier Extend Contract for Reference Laboratory Testing Services 2IDM Pharma Names Dr. Jeffrey W. Sherman Chief Medical Officer and Senior Vice President of Research and Development 2IDM Pharma Names Dr. Jeffrey W. Sherman Chief Medical Officer and Senior Vice President of Research and Development 3IDM Pharma Names Dr. Jeffrey W. Sherman Chief Medical Officer and Senior Vice President of Research and Development 4IDM Pharma Names Dr. Jeffrey W. Sherman Chief Medical Officer and Senior Vice President of Research and Development 5
(Date:6/25/2015)... 2015 According to a ... & Area), Technology, Material (Optical Prism, Piezoelectric, Capacitive ... & Others) & Geography - Global Forecast to ... market is expected to reach $14,500.07 Million by ... Browse 76 market Tables and 109 Figures ...
(Date:6/25/2015)... 25, 2015  TAKE Solutions Ltd., a global business ... United States Patent and Trademark Office (USPTO) for its ... TAKE Solutions, Clinical Accelerators to reduce the time taken ... to standardization without the accelerators), thus reducing time to ... At the heart of the patented Clinical Data ...
(Date:6/24/2015)... June 24, 2015 This report provides market ... next six years. It contains an analysis of the ... with their impact from the short, medium, and long ... the industry, market, and technology trends that currently, prevail ... of concerned authorities to efficiently manage the increasing marine ...
Breaking Biology News(10 mins):Fingerprint Sensors Market Worth $14,500.07 Million by 2020 2Fingerprint Sensors Market Worth $14,500.07 Million by 2020 3Fingerprint Sensors Market Worth $14,500.07 Million by 2020 4TAKE Solutions Awarded Patent By USPTO 2Automatic Identification System Market by Class, by Platform, by Application and by Geography - Global Forecasts & Analysis to 2014 - 2020 2
... have found that a type of amoeba acts as ... found in healthcare environments this discovery has implications for ... single cell amoeba, Acanthamoeba polyphagam commonly eats and digests ... However, instead of being digested by the amoeba, MRSA ...
... (HSP) can be utilized as a vaccine to ... National University (South Korea) today presented the findings ... bacterium Porphyromonas gingivalis heat-shock protein (HSP) 60 as ... bone loss.Recombinant P. gingivalis HSP60 was produced and ...
... of Utah researchers have taken a potentially powerful new ... illnesses out of the test tube and into animals ... in mice. , The research has particularly important implications ... disease that damages both nerves and blood vessels. , ...
Cached Biology News:Proteins spur diabetic mice models to grow blood vessels, nerves 2
Vitellogenin (Japanese medaka) Standard...
nuclear RNA export factor 1, mRNA...
... of gene expression) technology allows ... profiles generated by SAGE are ... transcripts making it possible to ... Kit is designed to make ...
The Captivate Disposable Sample Chamber is designed for use with the Captivate magnetic yoke assembly (C-24700) and can be used with our Captivate ferrofluid conjugates (C-21473 C-21474 C-21476) or ...
Biology Products: