Browsing Physics  Ph.D. / Sc.D. by Title
Now showing items 610629 of 1134

Nanocontacts controlled atombyatom in an ioncrystal friction emulator
(Massachusetts Institute of Technology, 2016)Friction is the basic, ubiquitous mechanical interaction between two surfaces that results in resistance to motion and energy dissipation. To test longstanding atomistic models of friction processes at the nanoscale, we ... 
Nanophotonics for tailoring lightmatter interaction/
(Massachusetts Institute of Technology, 2013)In this thesis, we will theoretically explore three nanophotonics phenomena which enable strong lightmatter interaction. The first phenomenon is plasmonic resonance, where the surface plasmon mode at metal and dielectric ... 
Nanophotonics for tailoring the flow of thermal electromagnetic radiation
(Massachusetts Institute of Technology, 2015)In this thesis, we explore the interaction of thermal radiation with nanoscale structures. First, we introduce the concept of radiative energy transfer between two objects of different temperatures in the near field, and ... 
A nanoscale probe of the quasiparticle band structure for two dimensional electron systems
(Massachusetts Institute of Technology, 2013)The advent of a broad class of twodimensional (2D) electronic materials has provided avenues to create and study designer electronic quantum phases. The coexistence of superconductivity, magnetism, density waves, and other ... 
Nanoscale structure and transport : from atoms to devices
(Massachusetts Institute of Technology, 2005)Nanoscale structures present both unique physics and unique theoretical challenges. Atomicscale simulations can find novel nanostructures with desirable properties, but the search can be difficult if the wide range of ... 
The nature and evolution of I. extragalactic radio sources, and II. young stellar clusters
(Massachusetts Institute of Technology, 1998) 
Neutral Pion Double Helicity Asymmetry in Polarized ProtonProton Collisions at [the square root of sigma]=200 GeV at STAR
(Massachusetts Institute of Technology, 2012)One of the primary goals of the spin physics program at the STAR experiment is to constrain the polarized gluon distribution function, [delta]g(X,Q²), by measuring the double longitudinal spin asymmetry, ALL, of various ... 
Neutrinos, neurons and neutron stars : applications of new statistical and analysis techniques to particle and astrophysics
(Massachusetts Institute of Technology, 2018)The IceCube detector opens a new window into our universe; valuable for both astronomy and particle physics. This thesis spans a wide range of topics that are bound together by a common theme: the development and application ... 
The neutron electric form factor to Q² = 1.45 (GeV/c)²
(Massachusetts Institute of Technology, 2004)The nucleon elastic electromagnetic form factors are fundamental quantities needed for an understanding of nucleon and nuclear electromagnetic structure. The evolution of the Sachs electric and magnetic form factors with ... 
Neutron scattering and magnetization studies of the spin correlations on the kagomé lattice antiferromagnet KFe₃(Oh)₆(SO₄)₂
(Massachusetts Institute of Technology, 2008)(cont.) The former represents a continuous planar rotational symmetry corresponding to the SO(2) symmetry, while the latter is a discrete symmetry associated with the Z2 symmetry. Depending on which measurements are ... 
Neutron scattering and thermodynamic studies of quantum magnetism on the kagomé lattice
(Massachusetts Institute of Technology, 2014)The geometry of the kagome lattice leads to exciting novel magnetic behavior in both ferromagnetic and antiferromagnetic systems. The collective spin dynamics were investigated in a variety of magnetic materials featuring ... 
Neutron scattering studies of the magnetism and lattice dynamics in La₂â‚‹xÌ³SrxÌ³CuO₄
(Massachusetts Institute of Technology, 1989) 
Neutron scattering study of magnetism in insulating and superconducting Lamellar copper oxides
(Massachusetts Institute of Technology, 1995) 
Neutron spinpendellösung resonance
(Massachusetts Institute of Technology, 1987) 
New ab initio formulation of electron correlation and spin resonance
(Massachusetts Institute of Technology, 2001)We explore a new class of computationally feasible approximations of the twobody density matrix as a finite sum of tensor products of singleparticle operators. Representing correlations by a single tensor product leads ... 
New analytic and computational techniques for finite temperature condensed matter systems
(Massachusetts Institute of Technology, 1992) 
New methods for the calculation of dynamical properties of manyparticle systems
(Massachusetts Institute of Technology, 1994) 
New optical surveys for gravitationally lensed quasars
(Massachusetts Institute of Technology, 2002)This thesis describes four new optical surveys for gravitationally lensed quasars. The goal of this work has been to (1) explore new strategies for conducting optical surveys, especially in the southern hemisphere, in the ... 
New perspectives on ab initio calculation and physical insights gained through linkage to continuum theories
(Massachusetts Institute of Technology, 2000)We explore the use of ab initio, densityfunctional methods for the study of largescale materials problems. Three examples are presented: (i) the interplay of surface and edge reconstructions in long silicon nanowires, ... 
A new thermalwave technique for studying magnetic phenomena occurring at low temperatures.
(Massachusetts Institute of Technology, 1965)