Dissertations / Theses on the topic 'Physics of disorder'
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Lee, Soon-Gul. "Experimental study of the effects of disorder in weakly disordered superconducting aluminum films /." The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487588939089315.
Full textRodriguez-Vega, Martin Alexander. "Disorder Effects in Dirac Heterostructures." W&M ScholarWorks, 2016. https://scholarworks.wm.edu/etd/1477068246.
Full textKlales, Anna. "A Classical Perspective on Non-Diffractive Disorder." Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:26718765.
Full textPhysics
Pyun, Deuk Soo. "Experimental study of the disorder effect in strongly disordered superconducting amorphous composite indium/indium oxide films /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487681148544033.
Full textBrinckerhoff, William B. "Dimensionality and disorder in molecule-based magnets." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1343143081.
Full textJones, Maximilian. "Disorder in multi-channel Luttinger liquids." Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8147/.
Full textWillans, Adam J. "Disorder in an exactly solvable quantum spin liquid." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:8ea5b2cc-4843-44ef-aa0a-8535f00c6dc8.
Full textVestergren, Anders. "From Order to Disorder in High Temperature Superconductors." Doctoral thesis, KTH, Physics, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3833.
Full textPhase transitions in a number of models related to hightemperature superconductors are investigated, using scalingmethods and Monte Carlo simulations. This thesis considers twomain topics.
The first topic is phase transitions, phase diagrams, andvortex motion in high temperature superconductors at finitetemperature, subject to magnetic fields and disorder. We studya vortex glass model at finite temperature, with stronguncorrelated vortex pinning and a magnetic field. We find thatthe vortex glass exists at finite temperature and calculate thecritical exponents of the transition. We also investigate hightemperature superconductors with columnar disorder in zero andapplied magnetic fields. Some of these studies are alsorelevant for the superfluid to Mott insulator transition ofbosons in two dimensions. We find that the unscreened Boseglass transition belongs to a new universality class. Wecalculate the critical exponents of the superconductingtransition with columnar defects in zero applied magneticfield. The transverse Meissner transition is studied, and wefind an exotic universality class with a correlation volumethat is infinitely anisotropic in all directions.
The second topic is confinement-deconfinement transitions incompact Abelian Higgs models. We develop a new order parameter,related to a large Wilson loop for fractionalized charges, anduse it to study the concept of topological order. Thesetransitions may be relevant for strongly correlated electronsin two dimensions.
Ward, S. N. E. "Spin ladder physics and the effect of random bond disorder." Thesis, University College London (University of London), 2015. http://discovery.ucl.ac.uk/1462036/.
Full textCunha, Frederico. "A surface charge induced order-disorder phase transition in organic monolayers." FIU Digital Commons, 1995. http://digitalcommons.fiu.edu/etd/2690.
Full textPovinelli, Michelle Lynn 1975. "Characteristics of defect modes, slow light, and disorder in photonic crystals." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/29449.
Full textIncludes bibliographical references (p. 97-122).
Chapter 1 introduces the subject of photonic crystals and reviews the basic physical principles underlying the formation of a band gap and the creation of localized defect modes. Proposed applications, fabrication techniques, and numerical simulation methods are surveyed. Chapter 2 demonstrates the construction of 2D-like defect modes in a 3D photonic crystal with a complete gap. The modes are similar to those in 2D photonic crystals in terms of polarization, field profile, and projected band structures. The results should facilitate the implementation of 2D photonic-crystal devices in realistic 3D systems. Chapter 3 explores the possibility of using photonic-crystal defect modes to design magnetic metamaterials: structures that exhibit magnetic properties despite the non- magnetic character of their constituents. A synthetic magnetic moment is provided by a point-defect mode studied in Chapter 2. Quantitative analysis of the far-field radiation pattern proves that the mode has a primarily magnetic character: over 98% of the emitted power goes into magnetic multipole radiation. Chapter 4 calculates the radiation pressure on the surface of a waveguide formed by ornnidirectionally reflecting mirrors. In the absence of losses, the pressure goes to infinity as the distance between the mirrors is reduced to the cutoff separation of the waveguide mode. The divergence results from the reduction of the modal group velocity to zero, which causes slow-light magnification of the field intensity at constant power input.
(cont.) Chapter 5 analyzes slow-light, band-edge waveguides for compact, integrated, tun- able optical time delays. Slow group velocities at the photonic band edge give rise to large changes in time delay for small changes in refractive index, shrinking device size. Figures of merit are defined for tuning sensitivity and signal dispersion. Exact calculations for a realistic, three-dimensional grating structure are shown to be well predicted by a simple quadratic-band model, simplifying device design. Chapter 6 derives a general, coupled-mode theory for disorder-induced scattering in strongly periodic systems. The analytical results allow the comparison of photonic- crystal waveguides to similar index-guided waveguides. In the realistic limit of weak disorder, reflections are identical while transmission is higher for the photonic-crystal waveguide. The general results, verified by direct numerical simulations in an example system, suggest a new mechanism for the design of low-loss waveguides.
by Michelle Lynn Povinelli.
Ph.D.
Van, Lierop Johan. "Separation of static and dynamic disorder in magnetic materials." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37853.
Full textFischer, Andrea M. "Disorder and interactions in graphene and other quantum systems." Thesis, University of Warwick, 2011. http://wrap.warwick.ac.uk/35238/.
Full textCourt, Steven James. "Physics of biological evolution." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/9975.
Full textNikolaou, Marios. "A Matter of Disorder : Monte Carlo Simulations of Phase Transitions in Strongly Disordered Systems." Doctoral thesis, Stockholm : Royal Institute of Technology, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4313.
Full textAlyami, Arwa Saleh. "STUDY OF LOCAL ATOMIC ORDER AND DISORDER IN Ni-Cr AND Ni-V ALLOYS." Kent State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=kent1555590952761642.
Full textCasas, Brian Wesley. "Effects of disorder and low dimensionality on frozen dynamics in Ca3Co2-xMnxO6." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5657.
Full textPetersen, Greg M. "Anderson Localization in Low-Dimensional Systems with Long-Range Correlated Disorder." Ohio University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1365762218.
Full textAgarwal, Kartiek. "Slow Dynamics in Quantum Matter: The Role of Dimensionality, Disorder and Dissipation." Thesis, Harvard University, 2016. http://nrs.harvard.edu/urn-3:HUL.InstRepos:33493505.
Full textPhysics
Ellis, John. "Studies of surface order, disorder and dynamics using helium atom scattering." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316784.
Full textMeetei, Oinam Nganba. "Metal-Insulator Transition and Novel Magnetism Driven by Coulomb Interactions, Spin-Orbit Coupling and Disorder." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1405698402.
Full textArmour, Andrew D. "Dynamics and disorder at the Kosterlitz-Thouless transition." Thesis, University of Nottingham, 1999. http://eprints.nottingham.ac.uk/13849/.
Full textCockcroft, J. K. "Neutron scattering studies of order-disorder transitions in hexafluoride salts." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233503.
Full textMarmodoro, A. "Beyond single-site disorder effects in first-principles studies of solid state systems." Thesis, University of Warwick, 2011. http://wrap.warwick.ac.uk/46881/.
Full textAbdel-Salam, Mohamed Ahmed Ahmed. "Study of the vortex interaction with correlated disorder in high temperature superconductor." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250177.
Full textWatkin, Timothy L. H. "The theory of quenched disorder : spin glasses, neural networks and statistical inference." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315731.
Full textLyon, Mary Elizabeth. "Electron screening and disorder-induced heating in ultracold neutral plasmas." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2857.
Full textThomson, Steven. "The effects of disorder in strongly interacting quantum systems." Thesis, University of St Andrews, 2016. http://hdl.handle.net/10023/9441.
Full textFulkerson, Matthew David. "Gas sensor array modeling and cuprate superconductivity from correlated spin disorder /." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486546889381639.
Full textBenini, Leonardo. "Disorder and localization in 1D long-range fermionic chains." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13479/.
Full textTusch, Michael Andreas. "Interplay between disorder and electron interactions : theoretical studies of an Anderson-Hubbard model." Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359510.
Full textO'Neal, Jared. "A Numerical Study of a Disorder-driven 2D Mott Insulator-to-Metal Quantum Phase Transition." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492701913534985.
Full textWan, Xuewen. "Effects of longitudinal disorder on the magnetic field distribution in bismuth strontium calcium copper oxide." W&M ScholarWorks, 2002. https://scholarworks.wm.edu/etd/1539623413.
Full textGambino, Davide. "Structural and magnetic disorder in crystalline materials : a first principles study." Licentiate thesis, Linköpings universitet, Teoretisk Fysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-156835.
Full textParisen, Toldin Francesco. "Critical behaviour of magnetic systems in the presence of quenched random disorder." Doctoral thesis, Scuola Normale Superiore, 2007. http://hdl.handle.net/11384/85889.
Full textSutherland, Gregory J. "Characterization of Order-Disorder Phase Transition Temperature for Select Nanoparticles." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5592.
Full textLoureiro, Bruno. "Disorder in holographic field theories : inhomogeneous geometries, momentum relaxation and SYK models." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/277911.
Full textChapman, Brandon D. "The role of disorder in structural phase transitions in perovskite ferroelectrics /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/9692.
Full textKissavos, Andreas. "Development and application of Muffin-Tin Orbital based Green’s function techniques to systems with magnetic and chemical disorder." Doctoral thesis, Linköpings universitet, Teoretisk Fysik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8231.
Full textNarayanan, Rajesh. "Influence of rare regions on the critical properties of systems with quenched disorder /." view abstract or download file of text, 1999. http://wwwlib.umi.com/cr/uoregon/fullcit?p9948028.
Full textTypescript. Includes vita and abstract. Includes bibliographical references (leaves 165-166). Also available for download via the World Wide Web; free to University of Oregon users. Address: http://wwwlib.umi.com/cr/uoregon/fullcit?p9948028.
Pinheiro, Fernanda. "Multi-species systems in optical lattices : From orbital physics in excited bands to effects of disorder." Doctoral thesis, Stockholms universitet, Fysikum, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-116436.
Full textAt the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 3: Submitted. Paper 4: Accepted. Paper 5: Submitted.
Marten, Tobias. "Ab-initio study of disorder broadening of core photoemission spectra in random metallic alloys." Thesis, Linköping University, The Department of Physics, Chemistry and Biology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2580.
Full textAb-initio results of the core-level shift and the distribution about the average for the 3d5/2 electrons of Ag, Pd and 2p3/2 of Cu are presented for the face-centered-cubic AgPd and CuPd random alloys. The complete screening model, which includes both initial and final states effects in the same scheme, has been used in the investigations.
The alloys have been modeled with a supercell containing 256 atoms. Density-functional theory calculations are carried out using the locally self consistent Green's function approach.
Results from the calculations clearly shows that the core-level shift distributions characteristic is Gaussian, but the components reveals a substantial difference in the FWHM (Full-Width at Half-Maximum). Comparison between the experimental and the calculated broadening shows a remarkable agreement.
Asker, Christian. "Effects of disorder in metallic systems from First-Principles calculations." Doctoral thesis, Linköpings universitet, Teoretisk Fysik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-53584.
Full textFulkerson, Matthew D. "Gas Sensor Array Modeling and Cuprate Superconductivity From Correlated Spin Disorder." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1023379849.
Full textDupont, Maxime. "Dynamics and disorder in quantum antiferromagnets." Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30092/document.
Full textCondensed matter physics, and especially strongly correlated systems provide some of the most challenging problems of modern physics. In these systems, the many-body interactions and correlations between quantum particles cannot be neglected; otherwise, the models would simply fail to capture the relevant physics at play and phenomena ensuing. In particular, the work presented in this manuscript deals with quantum magnetism and addresses several distinct questions through computational approaches and state-of-the-art numerical methods. The interplay between disorder (i.e. impurities) and interactions is studied regarding a specific magnetic compound, where instead of the expected many-body localized phase at high magnetic fields, a novel disorder-induced ordered state of matter is found, with a resurgence of quantum coherence. Furthermore, the dynamical response of quantum magnets to an external perturbation, such as it is accessed and measured in nuclear magnetic resonance and inelastic neutron scattering experiments is investigated
Roshi, Aleksander. "Quenched Random Disorder Studies In Liquid Crystal + Aerosil Dispersions." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-042705-123130/.
Full textKeywords: smectic-A to smectic-C; nematic to smectic-A; isotropic-nematic; phase transition; quenched random disorder; liquid crystal; gel structure; turbidity; gel dynamics; x-ray intensity fluctuation spectroscopy ( XIFS ); ac-calorimetry; x-ray diffraction Includes bibliographical references (p. 210-218).
Knight, Christopher J. "Hydrogen bond topology order/disorder transitions in ice and the behavior of defects in a disordered ice lattice /." Columbus, Ohio : Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1236788109.
Full textSighinolfi, Giovanni. "Exploring brain network features in borderline personality disorder: a graph-based analysis of MR images." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21714/.
Full textSong, Yi. "AC conductivity and dielectric constant of systems near the percolation threshold /." The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu148726754698361.
Full textDang, Mei-Zhen. "Interplay of spin structures, hyperfine magnetic field distributions and chemical order-disorder phenomena in face centered cubic Fe-Ni alloys studied by Mossbauer spectroscopy measurements and Monte Carlo simulations." Thesis, University of Ottawa (Canada), 1996. http://hdl.handle.net/10393/10020.
Full text