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Showing 1 to 20 of 24 for “"magnetic phases"”.
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Structural and Magnetic Phases in Pressure-Tuned Quantum Materials
… exploring the phase diagrams and properties of magnetically ordered insulators, to add understanding to several areas of current interest in condensed matter research. It shows the versatility of pressure as an experimental technique for exploring material properties free from complicating …
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Magnetic Phases of Narrow-Band Solids in the Hubbard Model
Made available in DSpace on 2015-05-12T22:38:57Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7317672.PDF: 2503839 bytes, checksum: d5d3e90ca34eaa190d6479c89beb6349 (MD5) Previous issue date: 1973
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Magnetic phases of narrow band solids in the Hubbard model
Submitted by William Weathers (weathrs2@illinois.edu) on 2012-04-16T20:55:20Z No. of bitstreams: 1 1973_yang.pdf: 2675575 bytes, checksum: 6b06bcc6d9897891d92eebafed933fe4 (MD5)
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Magnetic phases of large-spin ultracold bosons: quantum dimer models and spin liquid phases
… a great deal of attention for being an antiferromagnetic groundstate with many exotic properties, including the absence of local order, long-range entanglement, and fractionalized excitations. However, the identification and characterization of these phases in solid state systems remains a great …
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Phase diagram for the S equals one-half and J equals three-halves Kondo lattice model
… phase is represented by finite hybridization. Magnetic ordering is examined via ordering vectors, but coexistence with the Kondo phase is not allowed. Phase diagrams are produced in S=1/2 and J=3/2 with second-order transitions at Kondo-paramagnetic and magnetic-paramagnetic boundaries, and …
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Two-dimensional and three-dimensional magnetism in ultrathin epitaxial rare-earth metal films
This thesis reports the investigation of the magnetic behavior of ultrathin epitaxial films of the heavy rare-earth elements; Gd, Er, and Dy, grown with the technique of Molecular Beam Epitaxy (MBE). By employing advanced film fabrication techniques, each magnetic rare-earth element layer, between …
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Emergent Critical Phases in Strongly Correlated Low-Dimensional Magnetic Systems
… and highly fertile collection of van der Waals magnetic insulators known as transition metal phosphorous trichalcogenides, denoted as *TM*P*X*<sub>3</sub> (*TM* = Mn, Fe, Ni, *X* = S, Se). These compounds have proven to be ideal examples where structural, magnetic and electronic properties …
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Power-law liquid in high-temperature superconductors
… liquid framework to include the ubiquitous magnetic phases of high-$T_{c}$ superconductors, we study the local-itinerant dichotomy in iron pnictides. We show that an interplay between localized moments and itinerant electrons is needed to reproduce the spin excitations observed in inelastic …
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The Influence of Defects on the Vibrational and Electronic Properties of the Quasi 1D van der Waals Magnet CrSBr
… coupling, and the design of novel magnetic phases through defect engineering. The 2D semiconducting antiferromagnet CrSBr has generated recent attention because of its correlated magnetic, optical, and electronic properties, air stability, and quasi-1D electronic structure. In this …
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The Development of Tunnel Diode Oscillators And High Magnetic Field Studies of Unconventional Superconductor UTe2: Unveiling the Phase Diagram And Unconventional Hall Effect
… an extensive investigation of UTe2 under various magnetic field and pressure conditions by utilizing the Tunnel Diode Oscillator (TDO) and electrical transport. The study is primarily divided into two parts. The first part focuses on the utilization of the TDO to establish a magnetic …
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Stoner magnetism and Berry phase in quantum materials
… arising in this way on the correlated electron phases. The effect of Berry phase is particularly interesting for magnetic phases with spin and valley polarization originating from Stoner instability, such as those seen in moiré graphene and other narrow-band systems. Despite recent advances in …
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Electrical and magnetic properties of organic semiconductors: Electrical conductivity and electron spin resonance studies of semiconducting, organic, charge transfer salts.
… (TCNQ) were synthesised and their electrical and magnetic properties were investigated. These salts show unusual electrical and magnetic behaviour in contrast to conventional organic compounds. These salts have crystal structures which in general consist of TCNQ radical ions stacked in chains, …
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Self-Reversal of Remanent Magnetisation of Basalts - Origin, Mechanisms and Consequences
One of the main goals of current palaeomagnetic research is the attempt to acquire high-resolution data on palaeodirections and -intensities in order to obtain detailed information about the Earth's magnetic field in the geological past. The material best suited for such studies are basaltic rocks. …
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Ponto crítico quântico supercondutor em sistemas multi-bandas
… a new route to ¯nd and understand unconventional phases in Condensed Matter Physics. The past decades have seen a sub- stantial rejuvenation of interest in this area of study, driven by experiments on the cuprate superconductors, heavy fermions' materials, organic conductors and related compounds. …
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Understanding and Controlling the Magnetic and Optical Properties in van der Waals Semiconductors
… (2D) materials, 2D van der Waals (vdW) magnetic semiconductors are distinguished by their novel properties, which stem from the weak yet tunable interlayer magnetic interactions, adding an entirely new magnetic degree of freedom to vdW interfacial engineering. In this dissertation, we …
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The Sheeted Dyke-Gabbro Transition Zone: the Key to Unravelling the Palaeomagnetic Record of the Oman Ophiolite
… sheeted dykes and lava flows. Previous palaeomagnetic studies have suggested that the southern massifs of the ophiolite were affected by a large-scale remagnetization event during emplacement, which completely replaced original remanences acquired during crustal accretion. In contrast, primary …
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Magnetic and Structural Instabilities in Cerium Diantimonides under Pressure
… related Kondo lattice materials that are ferromagnetic at ambient pressure, unlike the majority of magnetic cerium compounds. The application of hydrostatic pressure is commonly employed to discover new phases, by continuously tuning a magnetic state, in the limit of low-temperatures, through a …
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Coherent Terahertz Control and Ultrafast Spectroscopy of Layered Antiferromagnets
… but also demonstrate the manipulation of ordered phases at ultrafast timescales, thereby opening a laboratory for studying materials in nonequilibrium regime. This dissertation contributes to the ongoing effort of developing new ultrafast spectroscopy tools, utilizing them to probe lattice, …
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Thermal QCD on the lattice – from finite density to non-uniform magnetic fields
… ($T$), baryon chemical potentials ($\mu_B$), and magnetic fields ($B$). Moreover, theoretical predictions indicate that magnetic fields in HICs are not only strong but also highly inhomogeneous in space. Using state-of-the-art computer simulations of the underlying theory, Quantum Chromodynamics …
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Strictions and new stripe phases of epitaxial erbium (0001) on sapphire (112̄0)
… to explore two phenomena that have made the magnetic phase diagram of thin films hard to predict. These are the elastic energy of epitaxial misfit and the magneto static energy of the equilibrium configuration. In both cases, Er is particularly well suited to the fundamental investigation of …
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