Multicomponent superconductivity based on multiband superconductors

Y Tanaka - Superconductor Science and Technology, 2015 - iopscience.iop.org
Multicomponent superconductivity is realized in multiband superconductors when an
interband pairing interaction is considerably weaker than the intraband interactions. There is …

[HTML][HTML] Experimental formation of a fractional vortex in a superconducting bi-layer

Y Tanaka, H Yamamori, T Yanagisawa, T Nishio… - … and its applications, 2018 - Elsevier
We report the experimental formation of a fractional vortex generated by using a thin
superconducting bi-layer in the form of a niobium bi-layer, observed as a magnetic flux …

[HTML][HTML] Observation of multiple fractional quanta in a superconducting bilayer disk with a pinhole

H Ishizu, H Yamamori, S Arisawa, T Nishio… - … and its Applications, 2022 - Elsevier
The magnetic-flux quantum (Φ 0) cannot be generally divided into smaller ones in a usual
superconductor. If a subdividing path is present, the science and technology of the …

Decomposition of a unit quantum and isolation of a fractional quantum by an externally injected soliton in an ultra-thin superconducting bi-layer film

Y Tanaka, H Yamamori, T Yanagisawa, T Nishio… - … and its Applications, 2017 - Elsevier
An ultra-thin superconducting bi-layer is an artificial multi-component superconductor in
which the magnetic flux can be fractionally quantized. The fractionally quantized state is …

Current-induced massless mode of the interband phase difference in two-band superconductors

Y Tanaka, I Hase, T Yanagisawa, G Kato… - … and its applications, 2015 - Elsevier
There is a current-induced massless mode of an interband phase difference in two-band
superconductors. For a thin wire, the externally applied current always invokes a finite …

Experimental Observation of a Possible First-Order Phase Transition below the Superconducting Transition Temperature in the Multilayer Cuprate Superconductor …

Y Tanaka, A Iyo, S Itoh, K Tokiwa, T Nishio… - Journal of the Physical …, 2014 - journals.jps.jp
A hysteretic specific heat jump at approximately 41 K is found experimentally in the
multilayer cuprate superconductor HgBa2Ca4Cu5O y (Hg-1245), with a superconducting …

[HTML][HTML] Vortex arrangement in an ultrathin superconducting bilayer disc

H Ishizu, H Yamamori, S Arisawa, T Nishio… - … and its Applications, 2023 - Elsevier
A direct current superconducting quantum interference device (SQUID) fixed on a recently
developed superconducting bilayer disc is effective for studying fractional magnetic quantum …

[HTML][HTML] Phase shifter based on an ultrathin superconducting bilayer with a through-hole for a superconducting device

H Ishizu, H Yamamori, S Arisawa, K Tokiwa… - … and its Applications, 2022 - Elsevier
Applying a radian phase shift other than 2 π is a key issue for superconducting circuits, such
as flux qubits. Magnetic flux is useful when generating a phase shift. However, to apply a …

Domains in multiband superconductors

Y Tanaka, T Yanagisawa, A Crisan, PM Shirage… - … and its applications, 2011 - Elsevier
Multiband superconductors can have several types of domains that are inhibited in
conventional single-band superconductors. These domains are phase domains and chiral …

Vortex molecule, fractional flux quanta, and interband phase difference soliton in multi-band superconductivity and multi-component superconductivity

Y Tanaka, DD Shivagan, A Crisan, A Iyo… - Journal of Physics …, 2009 - iopscience.iop.org
Variety of a vortex and lattice of vortex in two-component superconductivity are addressed.
The balance between an energy gain of the magnetic energy forming the" sub-unit flux …