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Showing 1 to 9 of 9 for “"Kondo insulator"”.
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SPIN-ORBIT COUPLING IN STRONGLY CORRELATED SYSTEMS
… the first case, impurity states in topological Kondo insulators are studied. Both in-gap and deep-bound impurity states are explicitly examined. The in-gap impurity states have properties similar to those of the topological surface states. It can explain some anomalous properties observed in …
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Magnetic-field-induced antiferromagnetism in the Kondo lattice
The half-filled Kondo lattice model, augmented by a Zeeman term, serves as a useful model of a Kondo insulator in an applied magnetic field. A variational mean field analysis of this system on a square lattice, backed up by quantum Monte Carlo calculations, reveals an interesting separation of …
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High magnetic field quantum oscillation study of Fermi surfaces in bulk unconventional insulators
… has therefore existed between conductors and insulators, where charge carriers' ability to roam freely separates the two phases of matter. However, even this seemingly immutable distinction has recently begun to blur. The recent discovery of a bulk Fermi surface in the Kondo insulator SmB6 has …
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High magnetic field study of strongly correlated electron systems
… phenomena including ferromagnetism, metal-insulator transition and superconductivity. Observation of quantum oscillations in the presence of a strong magnetic field is a signature of Fermi liquid behaviour and can be used in conjunction with complementary experimental techniques to map the …
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Phases and phase transitions of strongly correlated electron systems
… of strong correlations. Internal structure of Kondo singlet can also lead to quantum Hall effect in Kondo insulator, and formation of isolated points on the fermi surface with fractionalized quasiparticles. In the second part we study a phase transition in Heisenberg model between two …
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FeSb2: a riddle, inside an insulator, wrapped in a metal Electric and magnetic properties of the unconventional insulator iron diantimonide
The distinction between metals and insulators forms a fundamental tenet of condensed matter physics. Over the past decade or so, the explosion of interest in topological insulators – materials that host a metallic surface state atop their insulating bulks – has demonstrated how the contrasting …
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Renormalization for insulating states of matter
… the spectral weight structure of hole-doped Mott insulators. As the mixing between two separate Hubbard bands is dynamically generated, additional charge degrees of freedom is required to give a proper description to the relevant low-energy physics. On this account, we first discuss how the …
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Electronic light scattering in strongly correlated compounds
Submitted by Megan Hayes (mohayes2@illinois.edu) on 2012-05-03T17:30:50Z No. of bitstreams: 1 1997_nyhus.pdf: 4834912 bytes, checksum: 5e9f8252f3735202c41ae689e2e7b26d (MD5)
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Fermi Surfaces and Where to Find Them: Quantum Oscillations in Kondo Insulators and High-Temperature Superconductors
… of SmB₆ and YbB₁₂, two strongly-correlated Kondo insulators. We also present magnetic and transport measurements of underdoped YBa₂Cu₃O₆₊ₓ, a high-temperature superconductor, that prompt us to reinterpret the quantum oscillations previously associated with the non-superconducting normal …