SPIN SINGLET AND TRIPLET SUPERCONDUCTIVITY INDUCED BY CORRELATED HOPPING INTERACTIONS

2011 ◽  
Author(s):  
LUIS A. PEREZ ◽  
J. SAMUEL MILLAN ◽  
CHUMIN WANG
Keyword(s):  
Spin Singlet

ANALYSIS OF PROXIMITY EFFECTS BETWEEN SPIN SINGLET AND SPIN TRIPLET SUPERCONDUCTORS

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-481-C6-483 ◽  
Author(s):  
K. Scharnberg ◽  
D. Fay ◽  
N. Schopohl
Keyword(s):  
Proximity Effects ◽  
Spin Singlet ◽  
Spin Triplet

scholarly journals Multiorbital singlet pairing and d + d superconductivity

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Emilian M. Nica ◽  
Qimiao Si
Keyword(s):  
Time Reversal ◽  
Heavy Fermion ◽  
Degrees Of Freedom ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Matrix Structure ◽  
Spin Singlet ◽  
Low Energies ◽  
Triplet Pairing ◽  
Orbital Space

AbstractRecent experiments in multiband Fe-based and heavy-fermion superconductors have challenged the long-held dichotomy between simple s- and d-wave spin-singlet pairing states. Here, we advance several time-reversal-invariant irreducible pairings that go beyond the standard singlet functions through a matrix structure in the band/orbital space, and elucidate their naturalness in multiband systems. We consider the sτ3 multiorbital superconducting state for Fe-chalcogenide superconductors. This state, corresponding to a d + d intra- and inter-band pairing, is shown to contrast with the more familiar d + id state in a way analogous to how the B- triplet pairing phase of 3He superfluid differs from its A- phase counterpart. In addition, we construct an analog of the sτ3 pairing for the heavy-fermion superconductor CeCu2Si2, using degrees-of-freedom that incorporate spin-orbit coupling. Our results lead to the proposition that d-wave superconductors in correlated multiband systems will generically have a fully-gapped Fermi surface when they are examined at sufficiently low energies.

Spin-Singlet Ground State in Two-Dimensional S=1/2 Frustrated Square Lattice: (CuCl)LaNb2O7

2005 ◽  
Vol 74 (6) ◽  
pp. 1702-1705 ◽  
Author(s):  
H. Kageyama ◽  
T. Kitano ◽  
N. Oba ◽  
M. Nishi ◽  
S. Nagai ◽  
...  
Keyword(s):  
Ground State ◽  
Square Lattice ◽  
Singlet Ground State ◽  
Two Dimensional ◽  
Spin Singlet

The trion spin-singlet and -triplet states in ZnSe single quantum wells

2000 ◽  
Vol 214-215 ◽  
pp. 832-836 ◽  
Author(s):  
O Homburg ◽  
P Michler ◽  
K Sebald ◽  
J Gutowski ◽  
H Wenisch ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Triplet States ◽  
Single Quantum ◽  
Spin Singlet ◽  
Singlet And Triplet States

scholarly journals Ground state of a general electron-phonon Hamiltonian is a spin singlet

1995 ◽  
Vol 51 (5) ◽  
pp. 2812-2821 ◽  
Author(s):  
J. K. Freericks ◽  
Elliott H. Lieb
Keyword(s):  
Ground State ◽  
Spin Singlet

Spin-singlet quantum ground state in one-dimensional magnet vanadyl diacetate

2019 ◽  
Vol 473 ◽  
pp. 236-240
Author(s):  
E.A. Zvereva ◽  
T.M. Vasilchikova ◽  
M.I. Stratan ◽  
S.A. Ibragimov ◽  
I.S. Glazkova ◽  
...  
Keyword(s):  
Ground State ◽  
One Dimensional ◽  
Spin Singlet ◽  
Quantum Ground State

Orbital ordering and spin-singlet formation in a pyroxene compound NaTiSi2O6

2006 ◽  
Vol 378-380 ◽  
pp. 1056-1057 ◽  
Author(s):  
T. Shirakawa ◽  
Y. Ohta ◽  
T. Mizokawa
Keyword(s):  
Orbital Ordering ◽  
Spin Singlet

scholarly journals Josephson effect in junctions of conventional and topological superconductors

2018 ◽  
Vol 9 ◽  
pp. 1659-1676 ◽  
Author(s):  
Alex Zazunov ◽  
Albert Iks ◽  
Miguel Alvarado ◽  
Alfredo Levy Yeyati ◽  
Reinhold Egger
Keyword(s):  
Bound States ◽  
Josephson Effect ◽  
Mean Field ◽  
Josephson Current ◽  
Field Analysis ◽  
Current Phase ◽  
Topological Superconductor ◽  
Topological Superconductors ◽  
Spin Singlet ◽  
Hybrid Devices

We present a theoretical analysis of the equilibrium Josephson current-phase relation in hybrid devices made of conventional s-wave spin-singlet superconductors (S) and topological superconductor (TS) wires featuring Majorana end states. Using Green’s function techniques, the topological superconductor is alternatively described by the low-energy continuum limit of a Kitaev chain or by a more microscopic spinful nanowire model. We show that for the simplest S–TS tunnel junction, only the s-wave pairing correlations in a spinful TS nanowire model can generate a Josephson effect. The critical current is much smaller in the topological regime and exhibits a kink-like dependence on the Zeeman field along the wire. When a correlated quantum dot (QD) in the magnetic regime is present in the junction region, however, the Josephson current becomes finite also in the deep topological phase as shown for the cotunneling regime and by a mean-field analysis. Remarkably, we find that the S–QD–TS setup can support φ0-junction behavior, where a finite supercurrent flows at vanishing phase difference. Finally, we also address a multi-terminal S–TS–S geometry, where the TS wire acts as tunable parity switch on the Andreev bound states in a superconducting atomic contact.

Orbitally driven spin-singlet state in LiVS2

2011 ◽  
Vol 109 (7) ◽  
pp. 07E145 ◽  
Author(s):  
Ying Guo ◽  
Guoren Zhang ◽  
Xiaoli Zhang ◽  
Ting Jia ◽  
Zhi Zeng
Keyword(s):  
Singlet State ◽  
Spin Singlet
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