TY - GEN
T1 - Physical Properties of composite structures of d- and s-wave superconductors (d-dot's)
AU - Kato, Masaru
AU - Hirayama, Masaki
AU - Machida, Masahiko
AU - Koyama, Tomio
AU - Ishida, Takakazu
PY - 2006
Y1 - 2006
N2 - High-Tc superconducting dot embedded in an s-wave superconductor, which is called "d-dot", shows unusual properties. Especially, it shows spontaneous half-quantized magnetic fluxes at the corners of the dot because of the anisotropy of d-wave superconductivity. The d-dot can be considered as an artificial spin, because most stable states are doubly degenerate. We study stability of these degenerate states, using two-components Ginzburg-Landau equation. We show the energy difference between these degenerate states and excited states is comparable to the condensation energy of s-wave superconductor at T=0.
AB - High-Tc superconducting dot embedded in an s-wave superconductor, which is called "d-dot", shows unusual properties. Especially, it shows spontaneous half-quantized magnetic fluxes at the corners of the dot because of the anisotropy of d-wave superconductivity. The d-dot can be considered as an artificial spin, because most stable states are doubly degenerate. We study stability of these degenerate states, using two-components Ginzburg-Landau equation. We show the energy difference between these degenerate states and excited states is comparable to the condensation energy of s-wave superconductor at T=0.
KW - Ginzburg-Landau equation
KW - Half-quantized vortex
KW - High-temperature superconductors
KW - Nano-superconductors
UR - http://www.scopus.com/inward/record.url?scp=33947538958&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33947538958&partnerID=8YFLogxK
U2 - 10.1063/1.2354937
DO - 10.1063/1.2354937
M3 - Conference contribution
AN - SCOPUS:33947538958
SN - 0735403473
SN - 9780735403475
T3 - AIP Conference Proceedings
SP - 781
EP - 782
BT - LOW TEMPERATURE PHYSICS
T2 - LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
Y2 - 10 August 2006 through 17 October 2006
ER -