Zobrazeno 1 - 10
of 17
pro vyhledávání: '"G. A. Ummarino"'
Autor:
G. A. Ummarino, A. Gallerati
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 2, Pp 1-10 (2024)
Abstract We study the local interaction of the gravitational field with a superfluid condensate. To this end, we exploit the Ginzburg–Landau formalism with generalized Maxwell fields. The analysis shows that a slight local alteration of the gravita
Externí odkaz:
https://doaj.org/article/9fc22a54084643aa83d63cca39001b6e
Publikováno v:
Frontiers in Physics, Vol 10 (2022)
Externí odkaz:
https://doaj.org/article/fab51514594b48fe8bd6ceb1cde70970
Autor:
G. A. Ummarino
Publikováno v:
Advances in Condensed Matter Physics, Vol 2010 (2010)
The s-wave three-band Eliashberg theory can simultaneously reproduce the experimental critical temperatures and the gap values of the superconducting materials LaFeAsO0.9F0.1, Ba0.6K0.4Fe2As2 and SmFeAsO0.8F0.2 as exponent of the more important famil
Externí odkaz:
https://doaj.org/article/09637dcc0dba44e0be80ba0c7c383f21
Publikováno v:
Journal of physics. Condensed matter : an Institute of Physics journal. 33(4)
Optical spectroscopy was used to study the electrodynamics and hidden transport properties of a BaFe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::e64f7260f621e5c8224707cda1e0130d
https://pubmed.ncbi.nlm.nih.gov/32987370
https://pubmed.ncbi.nlm.nih.gov/32987370
Autor:
G A, Ummarino, D, Romanin
Publikováno v:
Journal of physics. Condensed matter : an Institute of Physics journal. 31(2)
A key aspect of field effect experiments is the possibility to induce charges on the first layers of a sample as a function of an applied gate voltage. It is therefore possible to study correlated phases of matter as a function of the induced charge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::c122758a12bc8e6f3bf1201a43d0aca9
https://pubmed.ncbi.nlm.nih.gov/30511649
https://pubmed.ncbi.nlm.nih.gov/30511649
Publikováno v:
Physical review letters. 121(10)
Microwave measurements of the London penetration depth and critical temperature T_{c} were used to show evidence of a disordered-driven transition from s_{±} to s_{++} order parameter symmetry in optimally doped Ba(Fe_{1-x}Rh_{x})_{2}As_{2} single c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::3b9b7b0385879e2dc67b30b6dcb4dbcd
https://pubmed.ncbi.nlm.nih.gov/30240265
https://pubmed.ncbi.nlm.nih.gov/30240265
Autor:
M, Tortello, D, Daghero, G A, Ummarino, V A, Stepanov, J, Jiang, J D, Weiss, E E, Hellstrom, R S, Gonnelli
Publikováno v:
Physical review letters. 105(23)
Directional point-contact Andreev-reflection measurements in Ba(Fe(1-x)Co(x))2As2 single crystals (T(c) = 24.5 K) indicate the presence of two superconducting gaps with no line nodes on the Fermi surface. The point-contact Andreev-reflection spectra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::8f8e4cc92426eec6c352446c2c1fe9aa
https://pubmed.ncbi.nlm.nih.gov/21231497
https://pubmed.ncbi.nlm.nih.gov/21231497
Autor:
R S, Gonnelli, D, Daghero, G A, Ummarino, A, Calzolari, M, Tortello, V A, Stepanov, N D, Zhigadlo, K, Rogacki, J, Karpinski, F, Bernardini, S, Massidda
Publikováno v:
Physical review letters. 97(3)
We present the first results of directional point-contact measurements in Mg1-xMnxB2 single crystals, with x up to 0.015 and bulk Tc down to 13.3 K. The order parameters Deltasigma and Deltapi were obtained by fitting the conductance curves with the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::9e71f624876be26b7061c3a806210cec
https://pubmed.ncbi.nlm.nih.gov/16907536
https://pubmed.ncbi.nlm.nih.gov/16907536
Publikováno v:
Physical review letters. 89(24)
We present the results of the first directional point-contact spectroscopy experiments in high-quality MgB2 single crystals. Because of the directionality of the current injection into the samples, the application of a magnetic field allowed us to se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::c5d53f1c7220c31c992f12848193699f
https://pubmed.ncbi.nlm.nih.gov/12484976
https://pubmed.ncbi.nlm.nih.gov/12484976
Autor:
G A Ummarino, D Romanin
Publikováno v:
Journal of Physics: Condensed Matter; 1/16/2019, Vol. 31 Issue 2, p1-1, 1p