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Showing 1 to 20 of 21 for “"Unconventional superconductors"”.
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Penetration Depth Studies of Unconventional Superconductors
The magnetic penetration depth λ of various unconventional superconductors have been measured down to ~0.1 K using a tunnel-diode based, self-inductive technique at 21 and 28 MHz. The samples measured are the heavy-fermion superconductors CeCoIn5 and PrOs4Sb12, the rare-earth borocarbides RENi2B2C …
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Magnetic Penetration Depth Analysis of Unconventional Superconductors
We present magnetic penetration depth measurements on various superconducting materials using a self-inductive, tunnel-diode based oscillator technique down to ∼100 mK. The materials measured consisted of the skutterudites LaRu4Sb12 and LaOs4Sb 12, the heavy fermion superconductor CeIrIn5, a …
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Scattering studies of density wave orders in unconventional superconductors
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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SANS investigations of the flux line lattice in unconventional superconductors
… the flux line lattice (FLL) in the \(d\)-wave superconductors YBa\(_2\)Cu\(_3\)O\(_7\) and CeCoIn\(_5\). Our studies on the High-\(T_c\) superconductor YBa\(_2\)Cu\(_3\)O\(_7\) were carried out using a twin-free sample, and we present the first observations of the intrinsic FLL structure in …
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Explorations of domain walls and half quantum vortices in unconventional superconductors
"Most known superconductors are characterized by spin-singlet superconducting order. An exception is Sr2RuO4, for which evidence is accumulating in favor of superconducting order of spin-triplet character, specifically of the equal-spin type of pairing and, furthermore, which may exibit …
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Direct Observation of Nodal Quasiparticles in the Non-Magnetic Superconductors Yttrium(lutetium)nickel-Boron-Carbon Field-Angle Dependent Heat Capacity
The gap function in unconventional superconductors may vanish at points or lines in momentum space, permitting electronic excitations, termed nodal quasiparticles, to exist at temperatures well below the superconducting transition. In the vortex phase, the presence of nodal quasiparticles should be …
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Design of Resistivity Instrumentation for a He3 Cryostat and its Application to the Charge Density Wave Superconductor CuxTiSe2
… interesting one which might reveal mechanisms in unconventional superconductors. A previous Brock graduate student grew crystals of CuxTiSe2. The precise doping of the samples was not known. In order to determine the doping parameter x in CuxTiSe2, a sensitive resistivity measurement system was …
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Emergence of charge density wave domain walls above the superconducting dome in TiSe2
Superconductivity (SC) in so-called “unconventional superconductors” is nearly always found in the vicinity of another ordered state, such as antiferromagnetism, charge density wave (CDW), or stripe order. This suggests a fundamental connection between SC and fluctuations in some other order …
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Three-particle mechanism for unconventional superconductivity with potential applications in moiré materials
… describing two of the most important class of unconventional superconductors – dilute superconductors with large [formula] ratios and spin-triplet superconductors – the so-coined “three-particle” mechanism for superconductivity studied throughout this thesis appears pivotal to future research …
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Angle-Resolved Photoemission Studies on the Many-Body Effects of High-Temperature Superconductor: Bi-2212
… in the pairing mechanism of high temperature superconductors. Unconventional superconductors such as cuprates are believed to exhibit spin-fluctuation-mediated pairing, as opposed to conventional superconductors where phonons mediate Cooper pairing. Dynamic spin susceptibility can characterize …
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Microscopic Theory of the Knight Shift
… of the Knight shift in conventional as well as unconventional superconductors does not yet exist. Motivated by the results of a literature review, which discusses Knight shift anomalies in multiple superconducting materials, this research studies a new model of the Knight shift, which involves …
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Frustrated Magnetism in Strongly Correlated Electron Systems
… magnetic semiconductors, spintronic devices and unconventional superconductors. In this work, we study magnetic structures and their corresponding excitations in several strongly correlated electron systems, where exotic orderings can be induced as a result of magnetic frustration and quantum …
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Topics in theory of superconductivity
… part a theory of nonlocal electrodynamics of unconventional superconductors is developed and applied to calculate the magnetic penetration depth in the Meissner state for a simple d-wave model of the cuprate high temperature superconductors. We find that in the clean limit, contrary to the …
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Nonreciprocal phenomena in superconductivity
… and time-reversal symmetries. Nonreciprocal superconductors describe certain classes of unconventional superconductors that include certain kinds of mixed-pairing and finite-momentum ones. They also occur in engineered systems exhibiting s-wave pairing-based superconductivity, for which we …
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Point-contact Andreev reflection studies on superconductors
… with an emphasis on PCARS as applied to various unconventional superconductors, such as NbSe$_2$, the borocarbide family RNi$_2$B$_2$C (R=Lu, Y) and the recently-discovered, iron-based superconductors AFe$_2$As$_2$ (A=Ba, Sr) with both hole and electron doping. The superconducting gap …
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Interaction effects in quantum interferometers
… attractive, giving rise to electron-pairing in unconventional superconductors and specifically designed mesoscopic setups. In particular, electron interactions can play a crucial role in quantum Hall systems, leading for instance to the emergence of quasi-particles with fractional charge and …
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Emergent Critical Phases in Strongly Correlated Low-Dimensional Magnetic Systems
… the discovery of novel quantum states, from unconventional superconductors to non-trivial metallic behaviours, has led to promising applications and intriguing questions regarding the underlying physics. Understanding these non-trivial phenomena demands a combined theoretical and experimental …
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