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

Domain walls (DWs) are singularities in an ordered medium that often host exotic phenomena such as charge ordering, insulator-metal transition, or superconductivity. The ability to locally write and erase DWs is highly desirable, as it allows one to design material functionality by patterning DWs in specific configurations. We demonstrate such capability at room temperature in a charge density wave (CDW), a macroscopic condensate of electrons and phonons, in ultrathin 1T-TaS2. A single femtosecond light pulse is shown to locally inject or remove mirror DWs in the CDW condensate, with probabilities tunable by pulse energy and temperature. Using time-resolved electron diffraction, we are able to simultaneously track anti-synchronized CDW amplitude oscillations from both the lattice and the condensate, where photoinjected DWs lead to a red-shifted frequency. Our demonstration of reversible DW manipulation may pave new ways for engineering correlated material systems with light.

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

Nature Physics ◽

10.1038/s41567-021-01267-3 ◽

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

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

Applied Physics Letters ◽

10.1063/5.0052603 ◽

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

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A study of the magnetoresistance of the charge-transfer salt at hydrostatic pressures of up to 20 kbar: evidence for a charge-density-wave ground state and the observation of pressure-induced superconductivity

Journal of Physics Condensed Matter ◽

10.1088/0953-8984/8/33/009 ◽

1996 ◽

Vol 8 (33) ◽

pp. 6005-6017 ◽

Cited By ~ 25

Author(s):

W Lubczynski ◽

S V Demishev ◽

J Singleton ◽

J M Caulfield ◽

L du Croo de Jongh ◽

...

Keyword(s):

Charge Transfer ◽

Charge Density ◽

Ground State ◽

Charge Density Wave ◽

Density Wave ◽

A Charge

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

Canadian Journal of Physics ◽

10.1139/p82-095 ◽

1982 ◽

Vol 60 (5) ◽

pp. 679-686 ◽

Cited By ~ 12

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.

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

International Journal of Modern Physics B ◽

10.1142/s0217979293003565 ◽

1993 ◽

Vol 07 (23n24) ◽

pp. 3973-4003 ◽

Cited By ~ 44

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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