scholarly journals Spin-density and charge-density excitations in quantum wires

1997 ◽  
Vol 55 (19) ◽  
pp. 13161-13172 ◽  
Author(s):  
Arne Brataas ◽  
A. G. Mal'shukov ◽  
Christoph Steinebach ◽  
Vidar Gudmundsson ◽  
K. A. Chao
Keyword(s):  
Charge Density ◽  
Spin Density ◽  
Quantum Wires

Inelastic light scattering by spin-density, charge-density, and single-particle excitations in GaAs quantum wires

1994 ◽  
Vol 49 (20) ◽  
pp. 14778-14781 ◽  
Author(s):  
A. Schmeller ◽  
A. R. Goñi ◽  
A. Pinczuk ◽  
J. S. Weiner ◽  
J. M. Calleja ◽  
...  
Keyword(s):  
Light Scattering ◽  
Charge Density ◽  
Spin Density ◽  
Single Particle ◽  
Quantum Wires ◽  
Inelastic Light Scattering

Inelastic light scattering by electrons in GaAs quantum wires: Spin-density, charge-density and single-particle excitations

1994 ◽  
Vol 37 (4-6) ◽  
pp. 1281-1284 ◽  
Author(s):  
A. Schmeller ◽  
A.R. Goñi ◽  
A. Pinczuk ◽  
J.S. Weiner ◽  
J.M. Calleja ◽  
...  
Keyword(s):  
Light Scattering ◽  
Charge Density ◽  
Spin Density ◽  
Single Particle ◽  
Quantum Wires ◽  
Inelastic Light Scattering

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.

GENERAL ANALYTIC DENSITY DISTRIBUTION FUNCTION FOR ATOMS

2000 ◽  
Vol 11 (06) ◽  
pp. 1167-1177
Author(s):  
ŞAKIR ERKOÇ
Keyword(s):  
Distribution Function ◽  
Analytic Function ◽  
Density Distribution ◽  
Charge Density ◽  
Spin Density ◽  
Radial Distribution ◽  
Density Functional ◽  
Density Functional Method ◽  
Functional Method ◽  
Density Distribution Function

A general analytic function is proposed to represent the radial distribution of charge density for atoms. The proposed function fits perfectly to the radial charge density generated numerically by local spin density functional method for atoms from He to Kr.

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