Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"frustrated magnets"”.
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Doping Studies of Frustrated Magnets
… effective way of investigating the properties of frustrated magnets. LiCuSbO4 is one of the simplest quasi-one dimensional spin-1/2 magnets which can be modelled with ferromagnetic(FM) nearest neighbour and antiferromagnetic (AFM) next nearest neighbour interactions. Here, doping with both …
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Exotic phenomena in rare-earth based geometrically frustrated magnets
Rare-earth (RE) based frustrated magnets are ideal systems to explore quantum effects in materials, which are paramount for the development of quantum computers, MRAM, and other next-generation technology. RE based materials are of specific interest due to the strong spin-orbit coupling and crystal …
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DISORDER EFFECTS IN FRUSTRATED MAGNETS AND ABSORBING STATE TRANSITIONS
<p>"Correlation, topology, and disorder can fundamentally affect the properties of interacting many-particle systems. After a short introduction which covers the basic concepts of phase transitions and scaling as well as the physics of Josephson junctions, the dissertation focuses on three separate …
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Quantum critical matter: Casimir pairing, emergent orders and topological defects
… temperature superconductors, dimerized quantum magnets and frustrated magnets. First, motivated by the recent discovery of a magnetic quantum critical point in hole-doped cuprates, we study the influence of the criticality on the superconducting pairing. We consider a fermion- fermion …
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Magnetic surface relaxation and reconstruction phenomena in frustrated magnetic systems
… is concerned with magnetism at the surfaces of frustrated magnets, and in particular with magnetism on face-centred cubic (FCC) lattice systems. Normally, magnets do not react to a surface. Frustrated magnets do, however, and we consider two cases: Magnetic relaxation and the more unusual …
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Compositional tuning, crystal growth, and magnetic properties of iron phosphate oxide
… Dilution of the magnetic sublattice in frustrated magnets can also provide insight into the nature of competing spin interactions. Dilution of the Fe3+ lattice in Fe3PO4O3 is accomplished by substituting non-magnetic Ga3+ to form the solid solution series Fe3-xGaxPO4O3 with x = 0, 0.012, …
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A complex of interactions in rare-earth based quantum honeycomb magnets
… spin-1/2 degrees of freedom on geometrically frustrated lattices. The first part of this dissertation examines Yb2Si2O7, which exhibits field-induced quantum phase transitions. Magnetization measurements reveal strong anisotropy consistent with spin-orbit coupled physics, while neutron …
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Inverse methods in quantum many-body physics
… which can occur at low temperatures in frustrated magnets and certain superconductors, and many-body localized (MBL) phases that do not obey the laws of thermodynamics, which can occur in interacting disordered magnets. Traditionally, such quantum phases of matter have been studied using …
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Investigating Topological Quantum Matter: Machine Learning Topological Phases, Topological Quantum Codes, Interplay of Disorder and Topology via Transport Phenomena and Phase Transitions
… practical tools for simulating anyon dynamics in frustrated magnets. Part II turns to fault-tolerance. Chapter 2 maps maximum-likelihood decoding of arbitrary CSS codes-including biased, spatially varying data and measurement noise-onto a weighted Max-3-SAT instance: each syndrome equation becomes …