Read e-book online Charge Dynamics in 122 Iron-Based Superconductors PDF

By Aliaksei Charnukha

ISBN-10: 331901191X

ISBN-13: 9783319011912

ISBN-10: 3319011928

ISBN-13: 9783319011929

This thesis combines hugely exact optical spectroscopy info at the lately found iron-based high-temperature superconductors with an incisive theoretical research. 3 remarkable effects are stated: (1) The superconductivity-induced amendment of the far-infrared conductivity of an iron arsenide with minimum chemical illness is quantitatively defined by way of a strong-coupling idea for spin fluctuation mediated Cooper pairing. The formalism constructed during this thesis additionally describes past spectroscopic information on extra disordered compounds. (2) an identical fabrics convey a pointy superconductivity-induced anomaly for photon energies round 2.5 eV, orders of significance better than the superconducting strength hole. the writer offers a qualitative interpretation of this extraordinary remark, that's in line with the multiband nature of the superconducting kingdom. (3) The thesis additionally develops a complete description of a superconducting, but optically obvious iron chalcogenide compound. the writer exhibits that this hugely strange habit should be defined due to the nanoscopic coexistence of insulating and superconducting levels, and he makes use of a mixture of 2 complementary experimental equipment - scanning near-field optical microscopy and low-energy muon spin rotation - to at once photograph the part coexistence and quantitatively be certain the section composition. those facts have very important implications for the translation of knowledge from different experimental probes.

Show description

Read or Download Charge Dynamics in 122 Iron-Based Superconductors PDF

Best dynamics books

Download e-book for kindle: The Dynamics of Radicalization: A Relational and Comparative by Eitan Y. Alimi, Chares Demetriou, Lorenzo Bosi

Why is it that a few social events engaged in contentious politics event radicalization while others don't? The Dynamics of Radicalization deals an leading edge answer by way of investigating how and while social stream organisations swap from a nonviolent mode of rivalry to a violent one. relocating past current motives that posit competitive motivations, grievances or violence-prone ideologies, this booklet demonstrates how those elements achieve and lose salience within the context of relational dynamics between a number of events and actors serious about episodes of competition.

Dynamics On and Of Complex Networks, Volume 2: Applications by Przemyslaw A. Grabowicz, José J. Ramasco, Víctor M. Eguíluz PDF

This self-contained publication systematically explores the statistical dynamics on and of complicated networks with a unique specialise in time-varying networks. within the continually altering sleek global, there's an pressing have to comprehend difficulties concerning structures that dynamically evolve in both constitution or functionality, or either.

New PDF release: Bluff-Body Wakes, Dynamics and Instabilities: IUTAM

Bluff-body wakes play an incredible position in lots of fluid dynamics difficulties and engineering functions. This publication offers and updated account of contemporary effects acquired within the learn of bluff-body wakes. Experimental, theoretical and numerical techniques are all comprehensively coated and in comparison. issues of specific curiosity comprise hydrodynamic instability analyses, 3-dimensional trend formation difficulties, move keep an eye on equipment, bifurcation analyses, numerical simulations and turbulence modelling.

Extra resources for Charge Dynamics in 122 Iron-Based Superconductors

Sample text

The authors have shown that the symmetry and the in-plane anisotropy of these spin fluctuations are well captured by density-functional and itinerant-electron calculations in the random-phase approximation and can be traced back to the structural properties of the host compounds without invoking exotic nematic scenarios with a symmetry-broken electronic state. 5 Superconducting Properties While the mechanism of superconductivity in the iron-based superconductors is under debate, it has been shown theoretically that the electron–phonon coupling in these compounds is very weak and thus unable to account for the observed high superconducting transition temperatures [78] (for an overview of the superconducting gaps and transition temperatures of a large set of iron-based superconductors see Ref.

Crossover from weak to strong pairing in unconventional superconductors. Physical Review B, 83, 214520. 10.

Since the (±π, ±π ) nodal lines (dashed lines connecting the corners of the unfolded Brillouin zone) do not cross any of the Fermi surfaces, the superconducting gap exhibits no nodes. However, when the full body-centered tetragonal symmetry is taken into account, the hypothetical unfolded Brillouin zone is folded along the Q = (π, π, π ) vector, whose in-plane projection is shown here as a black dotted arrow. e. the gray shaded area is transferred by Q to become the portion of the folded Brillouin zone marked with thick dashed lines.

Download PDF sample

Charge Dynamics in 122 Iron-Based Superconductors by Aliaksei Charnukha


by Brian
4.2

Rated 4.74 of 5 – based on 27 votes