scholarly journals Charge Density Wave and Narrow Energy Gap at Room Temperature in 2D Pb3–xSb1+xS4Te2−δ with Square Te Sheets

2017 ◽  
Vol 139 (32) ◽  
pp. 11271-11276 ◽  
Author(s):  
Haijie Chen ◽  
Christos D. Malliakas ◽  
Awadhesh Narayan ◽  
Lei Fang ◽  
Duck Young Chung ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Room Temperature ◽  
Energy Gap ◽  
Density Wave

scholarly journals Ultrafast manipulation of mirror domain walls in a charge density wave

2018 ◽  
Vol 4 (10) ◽  
pp. eaau5501 ◽  
Author(s):  
Alfred Zong ◽  
Xiaozhe Shen ◽  
Anshul Kogar ◽  
Linda Ye ◽  
Carolyn Marks ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Room Temperature ◽  
Domain Walls ◽  
Density Wave ◽  
Charge Ordering ◽  
Time Resolved ◽  
Insulator Metal Transition ◽  
Femtosecond Light Pulse ◽  
A Charge

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.

Achieving Room‐Temperature Charge Density Wave in Transition Metal Dichalcogenide 1 T ‐VSe 2

2020 ◽  
Vol 6 (5) ◽  
pp. 1901427
Author(s):  
Jiajia Feng ◽  
Resta A. Susilo ◽  
Bencheng Lin ◽  
Wen Deng ◽  
Yanju Wang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Charge Density ◽  
Charge Density Wave ◽  
Room Temperature ◽  
Density Wave ◽  
Transition Metal Dichalcogenide

Tunneling investigation of charge density wave energy gap in IT-TaS2

Physica B+C ◽  
1983 ◽  
Vol 117-118 ◽  
pp. 590-592 ◽  
Author(s):  
H. Ozaki ◽  
T. Mutoh ◽  
H. Ohshima ◽  
A. Okubora ◽  
N. Yamagata
Keyword(s):  
Charge Density ◽  
Wave Energy ◽  
Charge Density Wave ◽  
Energy Gap ◽  
Density Wave

Gigahertz-range synchronization at room temperature and other features of charge-density wave transport in the quasi-one-dimensional conductor NbS3

2009 ◽  
Vol 94 (15) ◽  
pp. 152112 ◽  
Author(s):  
S. G. Zybtsev ◽  
V. Ya. Pokrovskii ◽  
V. F. Nasretdinova ◽  
S. V. Zaitsev-Zotov
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Room Temperature ◽  
Density Wave ◽  
One Dimensional ◽  
Wave Transport

Charge-density-wave transport above room temperature in a polytype ofNbS3

1989 ◽  
Vol 40 (17) ◽  
pp. 11589-11593 ◽  
Author(s):  
Z. Z. Wang ◽  
P. Monceau ◽  
H. Salva ◽  
C. Roucau ◽  
L. Guemas ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Room Temperature ◽  
Density Wave ◽  
Wave Transport

Evidence of Room Temperature Charge-Density Wave Behavior and Glass-like States in Pressed Pellets of Lightly Doped Poly (3-methyl thiophene)

2002 ◽  
Vol 374 ◽  
pp. 119-124 ◽  
Author(s):  
V. M. Souza ◽  
L. Walmsley ◽  
A. A. Correa ◽  
E. C. Pereira ◽  
A. L. Gobbi
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Room Temperature ◽  
Density Wave

A charge-density-wave oscillator based on an integrated tantalum disulfide–boron nitride–graphene device operating at room temperature

2016 ◽  
Vol 11 (10) ◽  
pp. 845-850 ◽  
Author(s):  
Guanxiong Liu ◽  
Bishwajit Debnath ◽  
Timothy R. Pope ◽  
Tina T. Salguero ◽  
Roger K. Lake ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Charge Density ◽  
Charge Density Wave ◽  
Room Temperature ◽  
Density Wave ◽  
Wave Oscillator ◽  
A Charge

The Effects of Transition Metal Substitutions in the NbTe4-TaTe4 Charge-Density Wave System

1992 ◽  
Vol 45 (9) ◽  
pp. 1363 ◽  
Author(s):  
JC Bennett ◽  
FW Boswell ◽  
A Prodan ◽  
JM Corbett ◽  
S Ritchie
Keyword(s):  
Transition Metal ◽  
Charge Density ◽  
Charge Density Wave ◽  
Room Temperature ◽  
Density Wave ◽  
Dark Field ◽  
Wave System ◽  
Incommensurate Modulation ◽  
High Concentrations ◽  
A Charge

At room temperature, the structures of TaTe4 and NbTe4 are modulated by the presence of a charge-density wave which in the former compound is commensurate with the parent lattice and in the latter incommensurate. In addition, a series of incommensurate mixed crystals ( Tal-xNbx )Te4 (0 ≤ x ≤) exist in which the modulation wavevector increases as a function of x. In this paper, we report the occurrence of a systematic variation in the period of the charge-density wave upon substitution of the transition metal elements Ti, Zr or V for either Nb or Ta. Electron diffraction experiments reveal that, in TaTe4, substitutions of Group 4 elements Ti and Zr result in an incommensurate modulation with a decrease in the modulation wavevector q. In NbTe4, substitutions of Ti or Zr also reduce q, in this case towards the commensurate value, and, at sufficiently high concentrations, a commensurate phase is stabilized at room temperature. Vanadium substitutions in NbTe4 result in a slight increase in q. Satellite dark-field images reveal the presence of defects in the modulation structures of the doped crystals. The above results are discussed in terms of the factors which determine the charge-density wave periodicity in the NbTe4-TaTe4 system.

Dispersion of superconducting gap excitations in layered charge density wave systems

1983 ◽  
Vol 61 (8) ◽  
pp. 1160-1168 ◽  
Author(s):  
G. C. Mahanty ◽  
S. N. Behera
Keyword(s):  
Charge Density ◽  
Spectral Function ◽  
Charge Density Wave ◽  
Energy Gap ◽  
Density Wave ◽  
Exact Expression ◽  
Experimental Result ◽  
Layered Compound ◽  
Present Calculation ◽  
Peak Structure

The phonon spectral function for charge density wave (CDW) systems in the superconducting (SC) phase is calculated for finite wave vectors (q). An exact expression for the q dependent phonon self-energy is obtained. The analysis is carried out with a small q limit. The spectral function shows a two peak structure for frequencies co less than the SC energy gap (2Δ) in contrast to the single peak obtained by Balseiro and Falicov for q = 0. The peaks approach each other with increasing q and finally merge into one. Both modes have linear dispersions for small q and the frequency of the low-lying one goes to zero as q → 0. For ω > 2Δ the phonon spectrum does not change significantly. The results are discussed in context with the Raman scattering observation of SC gap excitations in 2H–NbSc2 (a layered compound exhibiting both CDW and SC transitions) by Sooryakumar and Klein. The present calculation demands that the strength of coupling between the CDW phonon and SC electrons be an order of magnitude smaller than that used for q = 0 in order to get an agreement with the experimental result.

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