Now showing items 1-10 of 138
Antiferromagnetic coupling of the single-molecule magnet Mn-12 to a ferromagnetic substrate
(American Physical Society, 2011-02-28)
We investigate magnetic coupling between a monolayer of prototype single-molecule magnets Mn-12 and a ferromagnetic Ni(111) substrate through S, using density-functional theory (DFT) and a DFT+U method. Our DFT and DFT+U ...
Pinning time statistics for vortex lines in disordered environments
(Amer Physical Soc, 2014-12-02)
Environmental Versus Demographic Variability in Two-Species Predator-Prey Models
(Amer Physical Soc, 2013-01-24)
Constraining non-standard interactions of the neutrino with Borexino
We use the Borexino 153.6 ton·year data to place constraints on non-standard neutrino-electron interactions, taking into account the uncertainties in the 7Be solar neutrino flux and the mixing angle θ 23, and backgrounds ...
Quantization of Fayet-Iliopoulos parameters in supergravity
(American Physical Society, 2011-04-08)
In this short article we discuss quantization of the Fayet-Iliopoulos parameter in supergravity theories. We argue that, in supergravity, the Fayet-Iliopoulos parameter determines a lift of the group action to a line bundle, ...
Robustness of Topologically Protected Surface States in Layering of Bi₂Te₃ Thin Films
(American Physical Society, 2010-10-27)
Bulk Bi<sub>2</sub>Te<sub>3</sub> is known to be a topological insulator. We investigate surface states of Bi<sub>2</sub>Te<sub>3</sub>(111) thin films of one to six quintuple layers using density-functional theory including ...
Time-resolved differential transmission in MOVPE-grown ferromagnetic InMnAs
(American Physical Society, 2012-03-27)
We measured time-resolved differential transmission in InMnAs for different pump/probe schemes as a function of temperature, laser fluence, and external magnetic field. We observed tunability of the carrier relaxation time. ...
Electronic and quantum phase coherence properties of bismuth thin films
(AIP Publishing, 2012-06)
We present a method to deposit bulk-like Bi films by thermal evaporation and study the electrical, quantum coherence, and physical properties. A two stage growth procedure was found to optimize the film properties, with ...
Percolation-enhanced supersolids in the extended Bose-Hubbard model
(American Physical Society, 2012-01-04)
We theoretically study the stability of lattice supersolid states in the extended Bose-Hubbard model with bounded spatial disorder. We construct a disorder mean-field theory and compare with quantum Monte Carlo calculations. ...
Comparison of the calorimetric and kinematic methods of neutrino energy reconstruction in disappearance experiments
(Amer Physical Soc, 2015-10-22)
To be able to achieve their physics goals, future neutrino-oscillation experiments will need to reconstruct the neutrino energy with very high accuracy. In this work, we analyze how the energy reconstruction may be affected ...