scholarly journals Spin gap and antiferromagnetic correlations in the Kondo insulator CeNiSn

1992 ◽  
Vol 69 (3) ◽  
pp. 490-493 ◽  
Author(s):  
T. E. Mason ◽  
G. Aeppli ◽  
A. P. Ramirez ◽  
K. N. Clausen ◽  
C. Broholm ◽  
...  
Keyword(s):  
Spin Gap ◽  
Kondo Insulator ◽  
Antiferromagnetic Correlations

Spin-gap and antiferromagnetic correlations in low-dimensional PbNi 2-x A x V 2 O 8 compounds (A=Mg, Co)

2002 ◽  
Vol 74 (0) ◽  
pp. s640-s642 ◽  
Author(s):  
I. Mastoraki ◽  
A. Lappas ◽  
R. Schneider ◽  
J. Giapintzakis
Keyword(s):  
Spin Gap ◽  
Antiferromagnetic Correlations ◽  
Low Dimensional

scholarly journals Superconductivity in the Hubbard model: a hidden-order diagnostics from the Luther-Emery phase on ladders

2019 ◽  
Vol 6 (2) ◽  
Author(s):  
Luca Fausto Tocchio ◽  
Federico Becca ◽  
Arianna Montorsi
Keyword(s):  
Hubbard Model ◽  
Finite Size ◽  
Scaling Analysis ◽  
Spin Gap ◽  
Spin Parity ◽  
Antiferromagnetic Correlations ◽  
Spatial Dimensions ◽  
Variational Wave Functions ◽  
Parity Operator ◽  
Variational Wave

Short-range antiferromagnetic correlations are known to open a spin gap in the repulsive Hubbard model on ladders with \boldsymbol{M}𝐌 legs, when \boldsymbol{M}𝐌 is even. We show that the spin gap originates from the formation of correlated pairs of electrons with opposite spin, captured by the hidden ordering of a spin-parity operator. Since both spin gap and parity vanish in the two-dimensional limit, we introduce the fractional generalization of spin parity and prove that it remains finite in the thermodynamic limit. Our results are based upon variational wave functions and Monte Carlo calculations: performing a finite size-scaling analysis with growing \boldsymbol{M}𝐌, we show that the doping region where the parity is finite coincides with the range in which superconductivity is observed in two spatial dimensions. Our observations support the idea that superconductivity emerges out of spin gapped phases on ladders, driven by a spin-pairing mechanism, in which the ordering is conveniently captured by the finiteness of the fractional spin-parity operator.

Closing the spin gap in the Kondo insulator Ce3Bi4Pt3 at high magnetic fields

Nature ◽  
2000 ◽  
Vol 405 (6783) ◽  
pp. 160-163 ◽  
Author(s):  
Marcelo Jaime ◽  
Roman Movshovich ◽  
Gregory R. Stewart ◽  
Ward P. Beyermann ◽  
Mariano Gomez Berisso ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
High Magnetic Fields ◽  
Spin Gap ◽  
Kondo Insulator

Surface Conductivity of the Ytterbium-Doped Topological Kondo-Insulator SmB6

2020 ◽  
Vol 65 (7) ◽  
pp. 233-237
Author(s):  
S. V. Demishev ◽  
M. A. Anisimov ◽  
V. V. Voronov ◽  
M. I. Gilmanov ◽  
V. V. Glushkov ◽  
...  
Keyword(s):  
Surface Conductivity ◽  
Kondo Insulator

scholarly journals Robust hybridization gap in the Kondo insulator YbB12 probed by femtosecond optical spectroscopy

2021 ◽  
Vol 103 (11) ◽  
Author(s):  
A. R. Pokharel ◽  
S. Y. Agustsson ◽  
V. V. Kabanov ◽  
F. Iga ◽  
T. Takabatake ◽  
...  
Keyword(s):  
Optical Spectroscopy ◽  
Kondo Insulator ◽  
Femtosecond Optical Spectroscopy

Cu NMR Study of Bilayer HgBa2CaCu2O6+δ–Variation of Pseudo Spin-Gap Spectrum

1998 ◽  
Vol 67 (7) ◽  
pp. 2212-2214 ◽  
Author(s):  
Yutaka Itoh ◽  
Ayako Tokiwa-Yamamoto ◽  
Takato Machi ◽  
Keiichi Tanabe
Keyword(s):  
Spin Gap ◽  
Nmr Study

Inelastic neutron scattering study of the spin-gap behavior in CuTeOBr

2005 ◽  
Vol 359-361 ◽  
pp. 1219-1221 ◽  
Author(s):  
S.J. Crowe ◽  
S. Majumdar ◽  
M.R. Lees ◽  
D. McK. Paul ◽  
D.T. Adroja ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Spin Gap ◽  
Scattering Study ◽  
Neutron Scattering Study
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