Universal phase diagram of superconductivity and charge density wave versus high hydrostatic pressure in pure and Se-doped 1T−TaS2

2018 ◽  
Vol 97 (22) ◽  
Author(s):  
Bosen Wang ◽  
Yu Liu ◽  
Xuan Luo ◽  
Kento Ishigaki ◽  
Kazuyuki Matsubayashi ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Hydrostatic Pressure ◽  
Charge Density ◽  
High Hydrostatic Pressure ◽  
Charge Density Wave ◽  
Density Wave ◽  
Wave Versus

Single Crystal Growth and Hydrostatic Pressure Study of Charge Density Wave Quantum Critical Lu(Pt1−xPdx)2In

2021 ◽  
Vol 90 (6) ◽  
pp. 064706
Author(s):  
Thomas Gruner ◽  
Stephen Andrew Hodgson ◽  
Christoph Geibel ◽  
Oliver Stockert ◽  
Friedrich Malte Grosche
Keyword(s):  
Crystal Growth ◽  
Hydrostatic Pressure ◽  
Single Crystal ◽  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Single Crystal Growth ◽  
Quantum Critical

Phase diagram of an extended t-U-J chain with frustrated exchange interaction

2014 ◽  
Vol 28 (32) ◽  
pp. 1450228
Author(s):  
Hanqin Ding ◽  
Jun Zhang
Keyword(s):  
Phase Diagram ◽  
Charge Density ◽  
Charge Density Wave ◽  
Nearest Neighbor ◽  
Spin Exchange ◽  
Density Wave ◽  
Spin Density Wave ◽  
Effective Field ◽  
J Chain ◽  
Bond Charge

Using the low-energy effective field theory scenario combined Abelian bosonization and renormalization-group techniques, we study the Hubbard chain with additional anisotropic nearest-neighbor and isotropic next-nearest-neighbor spin exchanges J and J′ in the weak-coupling regime. The spin correlations are non-critical due to the anisotropic J (Jxy ≠ Jz). The frustrating antiferromagnetic exchange J′ leads to an enhancement of the dimerized phase and induces a long-range charge-density-wave (CDW) phase. For smaller values of J′ (J′ < 2U/3), the quantum phase diagram consists of the insulating spin-density-wave ( SDW xy, SDW z) and bond-charge-density-wave (BCDW) phases and the triplet superconducting ( TS 0, TS ±) phase. For larger J′ (J′ ≥ 2U/3), a finite CDW phase appears. The result shows that the frustrated spin exchange J′ changes the topological structure of the usual t-U-J chain.

PHASE DIAGRAM OF THE ONE-DIMENSIONAL t–U–J MODEL WITH ON-BOND REPULSION AT HALF FILLING

2010 ◽  
Vol 24 (32) ◽  
pp. 6307-6322 ◽  
Author(s):  
HANQIN DING ◽  
YANSHEN WANG
Keyword(s):  
Phase Diagram ◽  
Charge Density ◽  
Spin Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Spin Density Wave ◽  
Metallic Phase ◽  
Flow Diagram ◽  
One Dimensional ◽  
Bond Charge

By using the bosonization approach and the renormalization group (RG) technique, we study the half-filled band one-dimensional t–U–J model with additional on-bond repulsion (W>0) in the weak-coupling regime. The presence of on-bond repulsion is responsible for realization of a metallic phase in the system, and the phase diagram is strongly controlled by the symmetry of the model. By analyzing the RG flow diagram and comparing order parameters, the phase boundaries are determined and the structure of the phase diagram is clarified. In the case of SU (2) ⊗ SU (2) symmetry, the phase diagram consists of a metallic phase characterized by a Luttinger liquid (LL) and two insulting phases characterized by the degenerate spin-density-wave (SDW) and the bond-charge-density-wave (BCDW). In the SU (2) ⊗ U(1)-symmetric case, the phase diagram contains two metallic phases: a LL and a Luther–Emery phase, and three insulating phases: the transverse SDW ( SDW ±), the longitudinal SDW ( SDW z) and the dimerized BCDW. The insulating charge-density-wave and bond-spin-density-wave (BSDW) phases are always suppressed in the ground state. In addition, the system show a long-ranged order in the BCDW and SDW z phases.

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