Zobrazeno 1 - 10
of 593
pro vyhledávání: '"Ojajärvi A"'
We show that an interacting electronic system with a single ordinary or extended Van Hove point, which crosses the Fermi energy, is unstable against triplet superconductivity. The pairing mechanism is unconventional. There is no Cooper instability. I
Externí odkaz:
http://arxiv.org/abs/2408.05572
Publikováno v:
Sci. Adv. 10, eadn3662 (2024)
Orbital magnetism and the loop currents (LC) that accompany it have been proposed to emerge in many systems, including cuprates, iridates, and kagome superconductors. In the case of cuprates, LCs have been put forward as the driving force behind the
Externí odkaz:
http://arxiv.org/abs/2311.18019
We show that the amplitude, or Higgs mode of a superconductor with strong spin-orbit coupling and an exchange field, couples linearly to the electromagnetic field. Furthermore, by coupling such a superconductor to an LC resonator, we demonstrate that
Externí odkaz:
http://arxiv.org/abs/2212.11615
We consider the Higgs mode at nonzero momentum in superconductors and demonstrate that in the presence of Rashba spin-orbit coupling, it couples linearly with an external exchange field. The Higgs-spin coupling dramatically modifies the spin suscepti
Externí odkaz:
http://arxiv.org/abs/2108.06202
A conventional superconductor sandwiched between two ferromagnets can maintain coherent equilibrium spin current. This spin supercurrent results from the rotation of odd-frequency spin correlations induced in the superconductor by the magnetic proxim
Externí odkaz:
http://arxiv.org/abs/2107.09959
Publikováno v:
Phys. Rev. B 103, 224524 (2021)
We develop a theory of the spin battery effect in superconductor/ferromagnetic insulator (SC/FI) systems taking into account the magnetic proximity effect. We demonstrate that the spin-energy mixing enabled by the superconductivity leads to the enhan
Externí odkaz:
http://arxiv.org/abs/2103.07412
Publikováno v:
Phys. Rev. Research 2, 033416 (2020)
Higgs mode in superconducting materials describes slowly-decaying oscillations of the order parameter amplitude. We demonstrate that in magnetic superconductors with built-in spin-splitting field Higgs mode is strongly coupled to the spin degrees of
Externí odkaz:
http://arxiv.org/abs/1907.00539
Publikováno v:
Phys. Rev. B 101, 115406 (2020)
We study the effects of the coupling between magnetization dynamics and the electronic degrees of freedom in a heterostructure of a metallic nanomagnet with dynamic magnetization coupled with a superconductor containing a steady spin-splitting field.
Externí odkaz:
http://arxiv.org/abs/1907.00424
Publikováno v:
Phys. Rev. B 98, 220504 (2018)
Recent experiments show how a bilayer graphene twisted around a certain magic angle becomes superconducting as it is doped into a region with approximate flat bands. We investigate the mean-field $s$-wave superconducting state in such a system and sh
Externí odkaz:
http://arxiv.org/abs/1805.01039
Publikováno v:
Phys. Rev. A 98, 043831 (2018)
We propose here a scheme, based on the measurement of quadrature phase coherence, aimed at testing the Clauser-Horne-Shimony-Holt Bell inequality in an optomechanical setting. Our setup is constituted by two optical cavities dispersively coupled to a
Externí odkaz:
http://arxiv.org/abs/1803.00331