Download EBOOK Designing Electron Wave Functions in Assembled Nanostructures PDF for free


Download EBOOK Designing Electron Wave Functions in Assembled Nanostructures PDF for free Category: Science & Geography
The author of the book: Christopher Ryan Moon
Format files: PDF, EPUB, TXT, DOCX
The size of the: 869 KB
Language: English
ISBN-13: 9781243609700
Edition: Proquest, Umi Dissertation Publishing
Date of issue: 1 September 2011

Description of the book "Designing Electron Wave Functions in Assembled Nanostructures":

We use the scanning tunneling microscope to not only to map electron wave functions but also to engineer them. By assembling nanostructures from individual atoms and molecules, we confine two-dimensional electronic states into closed electron resonators, or "quantum corrals." Precise control over the geometry of these structures allows electronic states to be tailored to suit particular experiments. Specifically, we design wave functions that enable studies of normally inaccessible quantum phases. First, we create pairs of quantum corrals with shapes drawn from contemporary mathematics. Exploiting special topological relationships between these structures, we retrieve internal quantum phase of electron wave functions without PDF using interferometry. Second, we demonstrate that adding a single atom to a quantum corral can cause its electronic states to recombine into coherent superpositions. The real-space position of the additional atom controls abstract superposition phase angles, enabling arbitrary time-independent superpositions to be created. Third, we study geometric phase by creating a series of quantum corrals that traverse a closed path through a parameter space. Tracking the corral wave functions reveals a phase shift depending solely on the path taken, directly visualizing Berry's phase evolution in a quantum system. Finally, we extend beyond closed electron resonators and ePub engineer wave functions in open nanostructures. We show that arbitrary patterns can be encoded into electronic states, creating a new form of holography on the nanoscale. We exhibit letters written in electron density rather than with atomic matter, and show that multiple letters may be simultaneously embedded at different energies in the same region of space. Because the wavelength of the electrons diminishes as energy is increased, this technique allows local information densities that exceed the conventionally assumed limit of 1 bit per atom. Taken together, the results in this thesis demonstrate unprecedented control of electron states in PDF condensed matter and illuminate fundamental quantum phases that underlie systems ranging from coherent electronic devices to complex quantum materials.

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Christopher Ryan Moon

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Download EBOOK Designing Electron Wave Functions in Assembled Nanostructures PDF for free



Download EBOOK Designing Electron Wave Functions in Assembled Nanostructures for free

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