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Charge density wave (CDW) materials can undergo an ultrafast phase transition after an ultrashort laser pulse excitation, and the suggested underlying mechanisms have always been associated with two main features: excitonic…

Materials Science · Physics 2021-12-24 Zhao-Jun Suo , Wen-Hao Liu , Zhi Wang , Hao-Wen Liu , Jun-Wei Luo , Shu-Shen Li , Lin-Wang Wang

We report on the evolution of the charge density wave (CDW) and spin density wave (SDW) order of a chromium film following photoexcitation with an ultrafast optical laser pulse. The CDW is measured by ultrafast time-resolved x-ray…

The transition metal dichalcogenide 1T-TaS$_2$ is well known to harbor a rich variety of charge density wave (CDW) distortions which are correlated with underlying lattice atom modulations. The long range CDW phases extend throughout the…

Materials Science · Physics 2017-05-24 Xiaochen Zhu , Ang J. Li , G. R. Stewart , Arthur F. Hebard

Transitions between different charge density wave (CDW) states in quasi-two-dimensional materials may be accompanied also by changes in the inter-layer stacking of the CDW. Using MeV ultrafast electron diffraction, the out-of-plane stacking…

Materials Science · Physics 2017-11-09 L. Le Guyader , T. Chase , A. Reid , R. K. Li , D. Svetin , X. Shen , T. Vecchione , X. J. Wang , D. Mihailovic , H. A. Dürr

The quasi-one-dimensional (quasi-1D) TaSe3 attracts considerable attention for its intriguing superconductivity and possible interplay with nontrivial topology and charge density wave (CDW) state. However, unlike the isostructural…

Mesoscale and Nanoscale Physics · Physics 2019-07-16 J. Yang , Y. Q. Wang , R. R. Zhang , L. Ma , W. Liu , Z. Qu , L. Zhang , S. L. Zhang , W. Tong , L. Pi , W. K. Zhu , C. J. Zhang

We propose a theory for quasi-two-dimensional transition metal dichalcogenides that provides a unified microscopic picture of the charge density wave (CDW) and superconducting phases. We show, based on the electron-phonon coupling and Fermi…

Strongly Correlated Electrons · Physics 2009-10-31 Antonio H. Castro Neto

Charge density wave (CDW) states in solids bear an intimate connection to underlying fermiology. Modification of the latter by a suitable perturbation provides an attractive handle to unearth novel CDW states. Here, we combine extensive…

Impurity pinning has long been discussed to have a profound effect on the dynamics of an incommensurate charge density wave (CDW), which would otherwise slide through the lattice without resistance. Here we visualize the impurity pinning…

Quantum strongly correlated matter exhibits properties which are not easily explainable in the conventional framework of Fermi liquids. Universal effective field theory tools are applicable in these cases regardless of the microscopic…

Strongly Correlated Electrons · Physics 2022-08-11 Tomas Andrade , Alexander Krikun

Charge density wave (CDW) correlations have recently been shown to universally exist in cuprate superconductors. However, their nature at high fields inferred from nuclear magnetic resonance is distinct from that measured by x-ray…

The appearance of an incommensurate charge density wave vector $\textbf{Q} = (Q_x,Q_y)$ on multiband intermetallic systems presenting commensurate charge density wave (CDW) and superconductivity (SC) orders is investigated. We consider a…

Strongly Correlated Electrons · Physics 2023-05-24 Nei Lopes , Daniel Reyes , Natanael C. Costa , Mucio A. Continentino , Christopher Thomas

Although charge-density wave (CDW) correlations exist in several families of cuprate supercon-ductors, they exhibit substantial variation in CDW wavevector and correlation length, indicating a key role for CDW-lattice interactions. We…

In the quasi-2D electron systems of the layered transition metal dichalcogenides (TMD) there is still a controversy about the nature of the transitions to charge-density wave (CDW) phases, i.e. whether they are described by a Peierls-type…

Strongly Correlated Electrons · Physics 2014-05-02 Jixia Dai , Eduardo Calleja , Jacob Alldredge , Xiangde Zhu , Lijun Li , Wenjian Lu , Yuping Sun , Thomas Wolf , Helmuth Berger , Kyle McElroy

We study ultrafast x-ray diffraction on the charge density wave (CDW) of SmTe$_3$ using an x-ray free electron laser. The CDW peaks show that photoexcitation with near-infrared pump centered at 800 nm generates domain walls of the order…

Certain layered transition metal dichalcogenides (TMDCs), such as 1T-TaS2, show a rich collection of charge density wave (CDW) phases at different temperatures, and their atomic structures and electron conductions have been widely studied.…

Superconductivity and charge density waves (CDW) are competitive, yet coexisting orders in cuprate superconductors. To understand their microscopic interdependence, a probe capable of discerning their interaction on its natural length and…

Charge density wave (CDW) order is an emergent quantum phase that is characterized by a periodic lattice distortion and charge density modulation, often present near superconducting transitions. Here we uncover a novel inverted CDW state by…

Using single crystal neutron and x-ray diffraction, we discovered a charge density wave (CDW) below 320 K, which accounts for the long-sought origin of the heat capacity and resistivity anomalies in UPt2Si2. The modulation wavevector, Qmod,…

We suggest a theoretical picture for distributions of plastic deformations experienced by a sliding Charge Density Wave in the course of the conversion from the normal current at the contact to the collective one in the bulk. Several…

Condensed Matter · Physics 2007-05-23 S. Brazovski , N. Kirova

The incommensurate charge density wave states (CDWs) can exhibit steady motion in the flow limit after depinning, behaving as a nonequilibrium system with time-dependent states. Since the moving CDW, like an electric current, breaks both…

Mesoscale and Nanoscale Physics · Physics 2025-01-07 Ying-Ming Xie , Hiroki Isobe , Naoto Nagaosa