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Showing 1 to 11 of 11 for “"quantum spin liquids"”.
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Terahertz spectroscopy of quantum spin liquids
The optical properties of the spin-1/2 kagome lattice antiferromagnetic Herbertsmithite, ZnCu₃(OH)₆Cl₂, are studied by means of Terahertz Time-Domain Spectroscopy. Herbertsmithite is proposed to exhibit Quantum Spin Liquid behavior, in which electron spins have strong antiferromagnetic …
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Nonzero temperatures and emergent disorder in spin liquids
At absolute zero temperature, spin liquids are known to exhibit a fascinating array of phenomena including topological order, emergent gauge fields, and the existence of exotic quasiparticles with fractional statistics. Meanwhile, at temperatures that are high compared to all characteristic …
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Mocking quantum mechanics: Semiclassical and machine-learning approaches to frustrated magnetism
Many-body quantum mechanics is the fundamental theory behind many areas of modern science, such as condensed-matter physics, nuclear physics, and quantum chemistry. It is also notoriously hard: the classical picture of particles with well-defined positions and velocities is replaced by an intricate …
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Subdimensional particles and higher rank quantum phases of matter
Many quantum phases of matter, such as quantum spin liquids and fractional quantum hall systems, are well-described in the language of gauge theory. Until recently, most theoretical attention has been focused on systems described by familiar vector gauge theories. In this thesis, we will explore …
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Novel Transition-Metal Oxides Under Pressure
… some high-temperature superconductors and Kitaev quantum spin liquids (KQSLs). In particular, the latter is a frustrated state of matter, modeled for 2D honeycomb lattices, that hosts topologically protected excitations and presents immense potential for application to fault-tolerant quantum …
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A complex of interactions in rare-earth based quantum honeycomb magnets
Quantum spin liquids (QSLs) represent an exotic state of matter characterized by long-range quantum entanglement and fractionalized excitations. Although predicted theoretically by models such as the Kitaev honeycomb model, experimentally verifying these states in real materials remains a …
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Neutron scattering and thermodynamic studies of quantum magnetism on the kagomé lattice
… and antiferromagnetic systems. The collective spin dynamics were investigated in a variety of magnetic materials featuring spin-1/2 and spin-1 moments on kagome lattices using neutron scattering and thermodynamic probes. Both ferromagnetic and antiferromagnetic systems were studied. Cu(1,3-bdc) …
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Inverse methods in quantum many-body physics
"The interactions of many quantum particles can give rise to fascinating emergent behavior and exotic phases of matter with no classical analogues. Examples include phases with topological properties, which can occur at low temperatures in frustrated magnets and certain superconductors, and …
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Novel magnetic and superconducting states in spin-1/2 kagome lattice and its doped variant
Quantum spin liquids, which are quantum ground states of interacting spin systems that break no symmetries, have long been a fascination among the theoretical condensed matter community. After years of experimental searches, several promising candidates finally emerged, including herbertsinithite …
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Wonderland of frustration: Magnetic moments and itinerant electrons on the pyrochlore lattice
… has given rise to a wide range of intriguing quantum phenomena, including spin liquids, fractionalisation and long-range entanglement. In this thesis, we investigate the effects of frustration in magnetic systems on the pyrochlore lattice, looking at both the conventional frustrated magnetism …
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Finite and infinite matrix product states for Gutzwiller projected mean-field wavefunctions and their applications to quantum spin systems
… disordered ground states of 2D or quasi-2D quantum spin systems has been an important research theme in recent years. Many of these states show exotic quantum orders that cannot be understood in the context of Landau-Ginzburg order parameters. With few exceptions, 2D analytical calculations …