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 12 of 12 for “"broken time reversal symmetry"”.
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Josephson Interferometry Measurements in High-T(c) Grain Boundary Junctions
… junctions depend strongly on the pairing symmetry and the electronic structure at the interface and can be used to determine the pairing symmetry as well as the structure of the grain boundary interface. Andreev reflection at the (110) surface in d-wave superconductors leads to the …
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Josephson Interferometry Measurements in High-Tc Grain Boundary Junctions
… junctions depend strongly on the pairing symmetry and the electronic structure at the interface and can be used to determine the pairing symmetry as well as the structure of the grain boundary interface. Andreev reflection at the (110) surface in d-wave superconductors leads to the …
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Explorations of domain walls and half quantum vortices in unconventional superconductors
… and, furthermore, which may exibit spontaneously broken time reversal symmetry. Triplet superconductors have been proposed to host half quantum vortices, whereas superconductors with spontaneously broken time-reversal symmetry are proposed to admit domain walls that separate regions of opposing …
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Geometric and Topological Aspects of Soft & Active Matter
… and nematic orientational order, I show how broken time-reversal symmetry due to the active drive allows polar flocks on a curved surface to support topologically protected sound modes. In an active nematic, activity instead causes topological disclinations to become spontaneously motile, …
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Quantum Semiconductor Structures Dressed with Terahertz Cavity Photons
… one-dimensional photonic-crystal cavity with broken time-reversal symmetry using magnetoplasmons in lightly doped semiconductors. Finally, we investigated heavy-mass Landau polaritons in a wide-gap semiconductor GaN in the ultrastrong coupling regime. These results highlight the advantages of …
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Fluxon Dynamics In Two-Gap Superconductor-Based Long Josephson Junction
… LJJ are estimated. Also, the possibility of a broken time-reversal symmetry state ground state of a single LJJ due to the presence of additional tunneling channels is investigated by using a microscopic model for two-gap superconductors. The consequence of this broken time reversal ground state …
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Investigation of half-quantized fluxoid states in Sr2RuO4 mesoscopic superconducting rings
… vortex entries, we found no evidence to support broken time-reversal symmetry (TRS) in these crystals. We argue that various scenarios exist to explain the negative result while still assuming the TRS breaking chiral order parameter. Also, micron-size annular-shaped Sr2RuO4 crystals were used to …
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Nonreciprocal and Exotic Radiative Transfer in Type-I Magnetic Weyl Semimetals
… law of radiation breaks down in systems with broken Lorentz reciprocity, which are characterized by asymmetric dielectric tensors and broken time reversal symmetry. This is typically achieved using an external magnetic field, but a recently discovered family of quantum materials—Weyl …
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Planar Tunneling Into YBCMO (M = Zinc, Nickel) Thin Films
… order parameter of YBCO being of d-wave symmetry. The magnitude of the ABS decreases as the doping concentration is increased. In the case of Zn doped films, the ABS are quenched for the highest doping concentration used. Applied magnetic fields split the ABS, consistent with the …
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Self-Consistent Study of Topological Superconductivity in Two-Dimensional Quasicrystals
… per edge or surface. Due to particle-hole symmetry inherent in a superconductor, in the case of TSC, the edge or surface modes in a topological superconductor are zero-energy Majorana fermions. Majorana fermions are their own antiparticles and due to the non-Abelian exchange statistics that …
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Field theoretical methods for strongly correlated electron systems
… generated by the spontaneous breakdown of time-reversalsymmetry. This state is known as the Chiral Spin State. We determine conditions for the restoration of time-reversal-symmetry in a bilayer antiferromagnet with an interlayer exchange interaction. We show the energetically favored ground …
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Quantum transport in magnetic topological insulators
… of the sample that become dissipative due to the broken time-reversal symmetry. It is shown that the backscatterings of these quasi-helical states have a magnetic field dependence and contribute to the dissipation in parallel with the residual surface and bulk states. A theoretical model is …