Journal: Journal of Superconductivity and Novel Magnetism

Abbreviation

J. Supercond. Nov. Magn.

Publisher

Springer

Journal Volumes

ISSN

1557-1939
1557-1947

Description

Filters

2003 - 2009132010 - 202015
Reset filters

Search Results

Publications 1 - 10 of 28
  • Dichroism in the Parent Ferropnictide BaFe2As2 Across the Nematic Phase Transition
    Item type: Journal Article
    Chinotti, Manuel; Mirri, Chiara; Dusza, A.; et al. (2016)
    Journal of Superconductivity and Novel Magnetism
  • Intrinsic Multiple Andreev Reflections in Layered Th-Doped Sm1−xThxOFeAs
    Item type: Journal Article
    Kuzmicheva, Tatiana E.; Kuzmichev, Svetoslav A.; Tchesnokov, Sergei N.; et al. (2016)
    Journal of Superconductivity and Novel Magnetism
  • Anisotropy of Superconducting Single Crystal SmFeAsO0.8F0.2 Studied by Torque Magnetometry
    Item type: Journal Article
    Weyeneth, S.; Puzniak, R.; Mosele, U.; et al. (2009)
    Journal of Superconductivity and Novel Magnetism
  • Effect of Heavy Al Doping on MgB2
    Item type: Conference Paper
    Gonnelli, R.S.; Calzolari, A.; Daghero, D.; et al. (2007)
    Journal of Superconductivity and Novel Magnetism
  • Scaling of the Stress and Temperature Dependence of the Optical Anisotropy in Ba(Fe1−xCox)2As2
    Item type: Journal Article
    Mirri, Chiara; Dusza, Adam; Bastelberger, Sandra; et al. (2016)
    Journal of Superconductivity and Novel Magnetism
    We revisit our recent investigations of the optical properties in the underdoped regime of the title compounds with respect to their anisotropic behavior as a function of both temperature and uniaxial stress across the ferro-elastic tetragonal-to-orthorhombic transition. By exploiting a dedicated pressure device, we can tune and control uniaxial stress in situ thus changing the degree of detwinning of the samples in the orthorhombic SDW state as well as pressure-inducing an orthorhombicity in the paramagnetic tetragonal phase. We discover a hysteretic behavior of the optical anisotropy; its stress versus temperature dependence across the structural transition bears testimony to the analogy with the magnetic-field versus temperature dependence of the magnetization in a ferromagnet when crossing the Curie temperature. In this context, we find furthermore an intriguing scaling of the stress and temperature dependence of the optical anisotropy in Ba(Fe₁₋ₓ Coₓ)₂As₂.
  • Doping Dependent Quasiparticle Relaxation Dynamics in SmFeAsO1−x F x Single Crystals: Comparison of Spin-Density Wave and Superconducting States
    Item type: Journal Article
    Mertelj, Tomaz; Kusar, Primoz; Stojchevska, Ljupka; et al. (2011)
    Journal of Superconductivity and Novel Magnetism
    We use optical femtosecond spectroscopy to investigate the quasiparticle relaxation and low-energy electronic structure in undoped and near-optimally doped SmFeAsO1−x F x iron-pnictide superconductor single crystals (SC). In the undoped SC, a single relaxation process with a divergent-like relaxation time at the spin density wave (SDW) transition is observed. From the relaxation time in the normal state, significantly above T SDW, the second moment of the Eliashberg function is determined to be λ〈ω 2〉≈135 meV2. Below T SDW, the temperature dependence of the photoexcited reflectivity transients indicates the appearance of a bottleneck due to opening of a SDW gap with a BCS-like temperature dependence and the characteristic magnitude, 2ΔSDW/k B T SDW=7±3, at 4.2 K. In the superconducting SC, multiple relaxation processes are present. In addition to the relaxation processes observed in the normal state, a distinct superconducting state relaxation component is observed consistent with the presence of BCS T-dependent gaps.
  • Anisotropic Superconducting Gap in Optimally Doped Iron–Based Material
    Item type: Journal Article
    Pal, Anirban; Chinotti, Manuel; Chu, Jiun Haw; et al. (2020)
    Journal of Superconductivity and Novel Magnetism
    We offer a comprehensive optical investigation of the optimally hole-doped Ba0.6K0.4Fe2As2 over a broad spectral range, as a function of temperature and of tunable applied stress, which acts as an external symmetry breaking field. We show that there is a large electronic nematicity at optimal doping which extends right under the superconducting dome and implies an anisotropy of the superconducting energy gaps. © 2019 Springer.
  • Distribution of Optical Spectral Weight in Detwinned Ba(Fe1-xCox)(2)As-2
    Item type: Journal Article
    Dusza, A.; Lucarelli, A.; Chu, J. H.; et al. (2013)
    Journal of Superconductivity and Novel Magnetism
  • Parabolic Scaling in Overdoped Cuprate: a Statistical Field Theory Approach
    Item type: Journal Article
    Tao, Yong (2020)
    Journal of Superconductivity and Novel Magnetism
  • Admixture of an s-wave component to the d-wave gap symmetry in high-temperature superconductors
    Item type: Journal Article
    Furrer, Albert (2008)
    Journal of Superconductivity and Novel Magnetism
Publications 1 - 10 of 28