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Atomic Layer Deposition to Fine-Tune the Surface Properties and Diameters of Fabricated Nanopores
(American Chemical Society, 2004)
Atomic layer deposition of alumina enhanced the molecule sensing characteristics of fabricated nanopores by fine-tuning their surface properties, reducing 1/f noise, neutralizing surface charge to favor capture of DNA and ...
Distributions of Flux Vacua
(American Institute of Physics, 2004)
We give results for the distribution and number of flux vacua of various types, supersymmetric and nonsupersymmetric, in IIb string theory compactified on Calabi-Yau manifolds. We compare this with related problems such ...
Building a Better Racetrack
(Institute of Physics Publishing, 2004)
We find IIb compactifications on Calabi-Yau orientifolds in which all Kahler moduli are stabilized, along lines suggested by Kachru, Kallosh, Linde and Trivedi.
Coulomb blockade in suspended Si3N4 -coated single-walled carbon nanotubes
(AIP Publishing, 2004)
Uniform coaxial coating of suspended single-walled carbon nanotubes with high-quality dielectric silicon nitride has been obtained by low-pressure chemical vapor deposition. A three-terminal device has been demonstrated ...
Feedback-controlled ion beam sculpting apparatus
(AIP Publishing, 2004)
We report the design of an “ion sculpting” instrument that enables the controlled fabrication of nanometer-sized structures in solid-state materials. The instrument employs a beam of kilo-electron-volt argon ions that ...
Collective modes of = 2 quantum Hall bilayers in tilted magnetic fields
(American Physical Society (APS), 2004)
We use the time-dependent Hartree Fock approximation to study the collective-mode spectra of n=2 quantum Hall bilayers in tilted magnetic fields, allowing for charge imbalance as well as tunneling between the two layers. ...
Magnetization Plateaus for Spin-One Bosons in Optical Lattices: Stern-Gerlach Experiments with Strongly Correlated Atoms
(American Physical Society (APS), 2004)
We consider insulating states of spin-one bosons in optical lattices in the presence of a weak magnetic field. For the states with more than one atom per lattice site we find a series of quantum phase transitions between ...
Competing orders in thermally fluctuating superconductors in two dimensions
(American Physical Society (APS), 2004)
We extend recent low-temperature analyses of competing orders in the cuprate superconductors to the pseudogap regime where all orders are fluctuating. A universal continuum limit of a classical Ginzburg-Landau functional ...
SO(4) Theory of Antiferromagnetism and Superconductivity in Bechgaard Salts
(American Physical Society (APS), 2004)
Motivated by recent experiments with Bechgaard salts, we investigate the competition between antiferromagnetism and triplet superconductivity in quasi-one-dimensional electron systems. We unify the two orders in an SO(4) ...
Evaporative cooling at low trap depth
(American Physical Society (APS), 2004)
A quantitative, analytic model of evaporative cooling covering both the small- (<4) and large- (>4) η regimes is presented. h is the dimensionless parameter defined as the trap depth divided by the temperature of the trapped ...