Spin-density-wave and charge-density-wave phason coherence lengths in magnetic fields

1992 ◽  
Vol 45 (22) ◽  
pp. 12887-12892 ◽  
Author(s):  
Aleksa Bjeliš ◽  
Kazumi Maki
Keyword(s):  
Magnetic Fields ◽  
Charge Density ◽  
Spin Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Spin Density Wave ◽  
Coherence Lengths

Charge Density Wave Accompanied by Spin Density Wave in Mn3Si

2014 ◽  
Vol 83 (4) ◽  
pp. 044715 ◽  
Author(s):  
Shoichi Tomiyoshi ◽  
Hiroyuki Ohsumi ◽  
Hisao Kobayashi ◽  
Akiji Yamamoto
Keyword(s):  
Charge Density ◽  
Spin Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Spin Density Wave

scholarly journals Superconductivity in the doped Hubbard model and its interplay with next-nearest hopping t′

Science ◽  
2019 ◽  
Vol 365 (6460) ◽  
pp. 1424-1428 ◽  
Author(s):  
Hong-Chen Jiang ◽  
Thomas P. Devereaux
Keyword(s):  
Hubbard Model ◽  
Charge Density ◽  
Spin Density ◽  
Charge Density Wave ◽  
Large Scale ◽  
Nearest Neighbor ◽  
High Temperature Superconductivity ◽  
Density Wave ◽  
Spin Density Wave ◽  
Hole Doping

The Hubbard model is widely believed to contain the essential ingredients of high-temperature superconductivity. However, proving definitively that the model supports superconductivity is challenging. Here, we report a large-scale density matrix renormalization group study of the lightly doped Hubbard model on four-leg cylinders at hole doping concentration δ = 12.5%. We reveal a delicate interplay between superconductivity and charge density wave and spin density wave orders tunable via next-nearest neighbor hopping t′. For finite t′, the ground state is consistent with a Luther-Emery liquid with power-law superconducting and charge density wave correlations associated with half-filled charge stripes. In contrast, for t′ = 0, superconducting correlations fall off exponentially, whereas charge density and spin density modulations are dominant. Our results indicate that a route to robust long-range superconductivity involves destabilizing insulating charge stripes in the doped Hubbard model.

IMPURITY EFFECTS ON THE MAGNETIC ORDERING IN CHROMIUM

1993 ◽  
Vol 07 (01n03) ◽  
pp. 620-623 ◽  
Author(s):  
R.S. FISHMAN ◽  
S.H. LIU
Keyword(s):  
Charge Density ◽  
Spin Density ◽  
Charge Density Wave ◽  
Second Harmonic ◽  
Density Wave ◽  
Spin Density Wave ◽  
Order Transition ◽  
Vanadium Concentration ◽  
First Order ◽  
First Order Transition

It is well-known that impurities profoundly alter the magnetic properties of chromium. While vanadium impurities suppress the Néel temperature TN, manganese impurities enhance TN substantially. As evidenced by neutron scattering experiments, doping with as little as 0.2% vanadium changes the transition from weakly first order to second order. Young and Sokoloff explained that the first-order transition in pure chromium is caused by a charge-density wave which is the second harmonic of the spin-density wave. By examining the subtle balance between the spin-density and charge-density wave terms in the mean-field free energy, we find that the first-order transition is destroyed when the vanadium concentration exceeds about 0.15%, in agreement with experiments.

The Study on Zero-Temperature Gap of Superconductor Having the Coexistence of SDW and CDW

2014 ◽  
Vol 979 ◽  
pp. 212-215
Author(s):  
Kanphot Thongcham ◽  
Pongkaew Udomsamuthirun
Keyword(s):  
Charge Density ◽  
Spin Density ◽  
Charge Density Wave ◽  
Function Method ◽  
Density Wave ◽  
Spin Density Wave ◽  
Zero Temperature ◽  
Model Hamiltonian ◽  
Greens Function ◽  
Interesting Area

In the field of superconductivity the most interesting area is the studying of the mechanism of the high Tc superconductor (HTS). Understanding of this mechanism, we can raise the critical temperature (Tc). There are many proposals theoretical descriptions for HTS. We focus on the spin density wave (SDW) and charge density wave (CDW), the static wave of spin density and charge density arising from the nesting property of Fermi surface that were observed in the superconductor. The model Hamiltonian of superconductor having SDW and CDW coexistence was studied by Greens function method. The analytic expression of zero-temperature gap of superconductor with the coexistence of the SDW and CDW were derived. By varying the effective potential, the phase diagram of the SDW and CDW was constructed then the band structure and density of states (DOS) of coexistent phase were also studied.

Are there a Charge-Density Wave or a Spin-Density Wave in the Cu-0 Chain in Y-Ba-Cu-0 Superconductors?

1992 ◽  
Vol 105-110 ◽  
pp. 703-706
Author(s):  
Jozef Krištiak ◽  
O. Sausa ◽  
Katarina Kristiaková ◽  
R. Hlubina
Keyword(s):  
Charge Density ◽  
Spin Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Spin Density Wave ◽  
A Charge
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