scholarly journals A charge density wave-like instability in a doped spin–orbit-assisted weak Mott insulator

2017 ◽  
Vol 16 (2) ◽  
pp. 200-203 ◽  
Author(s):  
H. Chu ◽  
L. Zhao ◽  
A. de la Torre ◽  
T. Hogan ◽  
S. D. Wilson ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Mott Insulator ◽  
Spin Orbit ◽  
A Charge

scholarly journals Robust charge-density wave strengthened by electron correlations in monolayer 1T-TaSe2 and 1T-NbSe2

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yuki Nakata ◽  
Katsuaki Sugawara ◽  
Ashish Chainani ◽  
Hirofumi Oka ◽  
Changhua Bao ◽  
...  
Keyword(s):  
Transition Temperature ◽  
Charge Density ◽  
Electron Correlation ◽  
Charge Density Wave ◽  
Room Temperature ◽  
High Temperature Superconductivity ◽  
Density Wave ◽  
Mott Insulator ◽  
Transition Metal Dichalcogenide ◽  
A Charge

AbstractCombination of low-dimensionality and electron correlation is vital for exotic quantum phenomena such as the Mott-insulating phase and high-temperature superconductivity. Transition-metal dichalcogenide (TMD) 1T-TaS2 has evoked great interest owing to its unique nonmagnetic Mott-insulator nature coupled with a charge-density-wave (CDW). To functionalize such a complex phase, it is essential to enhance the CDW-Mott transition temperature TCDW-Mott, whereas this was difficult for bulk TMDs with TCDW-Mott < 200 K. Here we report a strong-coupling 2D CDW-Mott phase with a transition temperature onset of ~530 K in monolayer 1T-TaSe2. Furthermore, the electron correlation derived lower Hubbard band survives under external perturbations such as carrier doping and photoexcitation, in contrast to the bulk counterpart. The enhanced Mott-Hubbard and CDW gaps for monolayer TaSe2 compared to NbSe2, originating in the lattice distortion assisted by strengthened correlations and disappearance of interlayer hopping, suggest stabilization of a likely nonmagnetic CDW-Mott insulator phase well above the room temperature. The present result lays the foundation for realizing monolayer CDW-Mott insulator based devices operating at room temperature.

scholarly journals Pressure induced superconductivity bordering a charge-density-wave state in NbTe4 with strong spin-orbit coupling

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Xiaojun Yang ◽  
Yonghui Zhou ◽  
Mengmeng Wang ◽  
Hua Bai ◽  
Xuliang Chen ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Wave State ◽  
A Charge ◽  
Strong Spin

scholarly journals Ultrafast formation of domain walls of a charge density wave in SmTe3

2021 ◽  
Vol 103 (5) ◽  
Author(s):  
M. Trigo ◽  
P. Giraldo-Gallo ◽  
J. N. Clark ◽  
M. E. Kozina ◽  
T. Henighan ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Domain Walls ◽  
Density Wave ◽  
A Charge

Ultrafast switching to an insulating-like metastable state by amplitudon excitation of a charge density wave

2021 ◽  
Author(s):  
Naotaka Yoshikawa ◽  
Hiroki Suganuma ◽  
Hideki Matsuoka ◽  
Yuki Tanaka ◽  
Pierre Hemme ◽  
...  
Keyword(s):  
Charge Density ◽  
Metastable State ◽  
Charge Density Wave ◽  
Density Wave ◽  
Ultrafast Switching ◽  
A Charge

scholarly journals Ultrafast spot-profile LEED of a charge-density wave phase transition

2021 ◽  
Vol 118 (22) ◽  
pp. 221603
Author(s):  
G. Storeck ◽  
K. Rossnagel ◽  
C. Ropers
Keyword(s):  
Phase Transition ◽  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Wave Phase ◽  
Charge Density Wave Phase ◽  
A Charge

An experimentalist's view of the galvanomagnetic and thermomagnetic properties of potassium

1982 ◽  
Vol 60 (5) ◽  
pp. 679-686 ◽  
Author(s):  
R. Fletcher
Keyword(s):  
Experimental Investigation ◽  
Charge Density ◽  
Charge Density Wave ◽  
High Field ◽  
Density Wave ◽  
The Other ◽  
Detailed Structure ◽  
Precise Nature ◽  
A Charge ◽  
Thermomagnetic Properties

This paper provides a brief survey of the experimental and theoretical situation regarding the galvano- and thermomagnetic properties of potassium viewed within the context of the behaviour of other metals. Most of the data are consistent with various sample imperfections as being the major source of the anomalies that are found. However, the precise nature of the imperfections and the mechanism by which the imperfections produce the anomalies are not yet known. It is argued that the recently discovered detailed structure in the high field induced torque of K should be subjected to intensive experimental investigation before drawing any conclusions with regards to the possible presence of a charge density wave; the other magnetotransport properties offer little evidence either for or against such a possibility.

CHARGE DENSITY WAVE TRANSITIONS IN TWO-DIMENSIONAL TRANSITION METAL BRONZES AND OXIDES

1993 ◽  
Vol 07 (23n24) ◽  
pp. 3973-4003 ◽  
Author(s):  
P. FOURY ◽  
J.P. POUGET
Keyword(s):  
Transition Metal ◽  
Charge Density ◽  
Ground State ◽  
Charge Density Wave ◽  
Density Wave ◽  
Electron Localization ◽  
Two Dimensional ◽  
Fermi Surfaces ◽  
A Charge ◽  
Structural Instabilities

The structural instabilities towards the formation of a charge density wave (CDW) ground state exhibited by several layered Mo and W bronzes and oxides are reviewed. It is shown that in these two-dimensional (2D) metals, including the purple bronzes A x Mo 6 O 17 (A=K, Na, Tl; x≈1), the γ and η phases of MO 4 O 11 and the monophosphate tungsten bronzes with pentagonal tunnels ( PO 2)4 ( WO 3)2m(m=4, 6, 7), the CDW instability can be associated with particular chains of MoO 6 or WO 6 octahedra of the ReO 3 type slabs along which there is a strong overlap of the t 2g orbitals. The CDW critical wave vectors of the purple bronzes, Mo 4 O 11 and the tungsten bronzes with m=4 and 6 lead to a common nesting between differently oriented 1D Fermi surfaces. It is suggested that the anharmonic CDW modulation, which occurs in the tungsten bronzes with m≥7, could be the structural fingerprint of electron localization effects.

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