scholarly journals Spectromicroscopy of single and multilayer graphene supported by a weakly interacting substrate

2008 ◽  
Vol 78 (20) ◽  
Author(s):  
Kevin R. Knox ◽  
Shancai Wang ◽  
Alberto Morgante ◽  
Dean Cvetko ◽  
Andrea Locatelli ◽  
...  
Keyword(s):  
Multilayer Graphene ◽  
Weakly Interacting

Search for weakly interacting massive dark matter particles: state of the art and prospects

2020 ◽  
Author(s):  
Andrei B. Aleksandrov ◽  
Aigerim B. Dashkina ◽  
Nina S. Konovalova ◽  
Natal'ya M. Okat'eva ◽  
Natal'ya G. Polukhina ◽  
...  
Keyword(s):  
Dark Matter ◽  
State Of The Art ◽  
Weakly Interacting

scholarly journals Detecting Cold Dark Matter Candidates

1987 ◽  
Vol 117 ◽  
pp. 490-490
Author(s):  
A. K. Drukier ◽  
K. Freese ◽  
D. N. Spergel
Keyword(s):  
Dark Matter ◽  
Cold Dark Matter ◽  
Galactic Halo ◽  
Dark Matter Particle ◽  
Low Energy ◽  
The Sun ◽  
Background Rate ◽  
System Noise ◽  
Weakly Interacting ◽  
Massive Neutrinos

We consider the use of superheated superconducting colloids as detectors of weakly interacting galactic halo candidate particles (e.g. photinos, massive neutrinos, and scalar neutrinos). These low temperature detectors are sensitive to the deposition of a few hundreds of eV's. The recoil of a dark matter particle off of a superheated superconducting grain in the detector causes the grain to make a transition to the normal state. Their low energy threshold makes this class of detectors ideal for detecting massive weakly interacting halo particles.We discuss realistic models for the detector and for the galactic halo. We show that the expected count rate (≈103 count/day for scalar and massive neutrinos) exceeds the expected background by several orders of magnitude. For photinos, we expect ≈1 count/day, more than 100 times the predicted background rate. We find that if the detector temperature is maintained at 50 mK and the system noise is reduced below 5 × 10−4 flux quanta, particles with mass as low as 2 GeV can be detected. We show that the earth's motion around the Sun can produce a significant annual modulation in the signal.

scholarly journals Multilayer graphene supported flexible optoelectronic devices

2020 ◽  
Author(s):  
Vera Marinova ◽  
Stefan Petrov ◽  
Blagovest Napoleonov ◽  
Jordan Mickovski ◽  
Dimitrina Petrova ◽  
...  
Keyword(s):  
Optoelectronic Devices ◽  
Multilayer Graphene

scholarly journals Vertical monolithic integration of wide- and narrow-bandgap semiconductor nanostructures on graphene films

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Youngbin Tchoe ◽  
Janghyun Jo ◽  
HoSung Kim ◽  
Heehun Kim ◽  
Hyeonjun Baek ◽  
...  
Keyword(s):  
Graphene Film ◽  
Monolithic Integration ◽  
Hybrid Nanostructures ◽  
Dual Wavelength ◽  
Multilayer Graphene ◽  
Graphene Films ◽  
Transmission Electron ◽  
Zno Nanotubes ◽  
Metal Organic ◽  
Hybrid Configuration

AbstractWe report monolithic integration of indium arsenide (InAs) nanorods and zinc oxide (ZnO) nanotubes using a multilayer graphene film as a suspended substrate, and the fabrication of dual-wavelength photodetectors with the hybrid configuration of these materials. For the hybrid nanostructures, ZnO nanotubes and InAs nanorods were grown vertically on the top and bottom surfaces of the graphene films by metal-organic vapor-phase epitaxy and molecular beam epitaxy, respectively. The structural, optical, and electrical characteristics of the hybrid nanostructures were investigated using transmission electron microscopy, spectral photoresponse analysis, and current–voltage measurements. Furthermore, the hybrid nanostructures were used to fabricate dual-wavelength photodetectors sensitive to both ultraviolet and mid-infrared wavelengths.

scholarly journals Asymptotic expansion of low-energy excitations for weakly interacting bosons

2021 ◽  
Vol 9 ◽  
Author(s):  
Lea Boßmann ◽  
Sören Petrat ◽  
Robert Seiringer
Keyword(s):  
Asymptotic Expansion ◽  
Coulomb Potential ◽  
Mean Field ◽  
Low Energy ◽  
Energy Eigenstates ◽  
Bogoliubov Theory ◽  
Weakly Interacting ◽  
Repulsive Coulomb ◽  
The Mean

Abstract We consider a system of N bosons in the mean-field scaling regime for a class of interactions including the repulsive Coulomb potential. We derive an asymptotic expansion of the low-energy eigenstates and the corresponding energies, which provides corrections to Bogoliubov theory to any order in $1/N$ .

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