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Van der Waals (vdW) heterostructures continue to attract intense interest as a route of designing materials with novel properties that cannot be found in naturally occurring materials. Unfortunately, this approach is currently limited to…

Abstract: Layered transition-metal dichalcogenides (TMDCs) down to the monolayer (ML) limit provide a fertile platform for exploring charge-density waves (CDWs). Though bulk NbTe2 is known to harbor a single axis 3*1 CDW coexisting with…

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

Charge density waves (CDWs) underpin the electronic properties of many complex materials. Near-equilibrium CDW order is linearly coupled to a periodic, atomic-structural distortion, and the dynamics is understood in terms of amplitude and…

Van der Waals (vdW) materials exhibit a variety of states that can be switched with low power at low temperatures, offering a viable cryogenic "flash memory" required for the classical control electronics for solid-state quantum information…

Here we investigate how charge density waves (CDW), inherent to a monolayer, are effected by creating twisted van der Waals structures. Homobilayers of metallic transition metal dichalcogenides (TMDs), at small twist angles where there is…

Materials Science · Physics 2023-05-29 Zachary A. H. Goodwin , Vladimir I. Fal'ko

Spontaneous formation of charge density wave (CDW) superstructures in monolayers (MLs) of a two-dimensional (2D) crystal lattice is fundamental in understanding its complex quantum states. We report a successful top-down liquid phase…

Recently the charge density wave (CDW) in vanadium dichalcogenides have attracted increasing research interests, but a real-space investigation on the symmetry breaking of the CDW state in VTe2 monolayer is still lacking. We have…

Materials Science · Physics 2020-01-15 Guangyao Miao , Siwei Xue , Bo Li , Zijian Lin , Bing Liu , Xuetao Zhu , Weihua Wang , Jiandong Guo

Van der Waals materials enable the construction of atomically sharp interfaces between compounds with distinct crystal and electronic properties. This is dramatically exploited in moir\'e systems, where a lattice mismatch or twist between…

Charge density waves (CDW) and their concomitant periodic lattice distortions (PLD) govern the electronic properties in many layered transition-metal dichalcogenides. In particular, 1T-TaS2 undergoes a metal-to-insulator phase transition as…

Two-dimensional (2D) materials are known to possess emergent properties that are not found in their bulk counterparts. Recent experiments have shown a $\sqrt7 \times \sqrt3$ charge density wave (CDW) in monolayer 1T-VSe$_2$, in contrast to…

Materials Science · Physics 2021-11-03 Zishen Wang , Jun Zhou , Kian Ping Loh , Yuan Ping Feng

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

Transition metal dichalcogenides are promising candidates to show long-range ferromagnetic order in the single-layer limit. Based on ab initio calculations, we report the emergence of a charge density wave (CDW) phase in monolayer…

Materials Science · Physics 2020-10-07 Adolfo O. Fumega , Jan Phillips , Victor Pardo

New quantum phenomena are continuously being discovered in 2D systems. In particular, the charge density wave (CDW) has the aspect of a quantum crystal with a macroscopic wave function (order parameter), so unlike quantum liquids…

Strongly Correlated Electrons · Physics 2022-08-16 Keiji Nakatsugawa , Tatsuhiko N. Ikeda , Takeshi Toshima , Satoshi Tanda

Single layers of transition metal dichalcogenides (TMDCs) are excellent candidates for electronic applications beyond the graphene platform; many of them exhibit novel properties including charge density waves (CDWs) and magnetic ordering.…

Mesoscale and Nanoscale Physics · Physics 2018-11-15 P. Chen , W. -W. Pai , Y. -H. Chan , V. Madhavan , M. Y. Chou , S. -K. Mo , A. -V. Fedorov , T. -C. Chiang

Two-dimensional (2D) materials that exhibit charge density waves (CDWs) have generated many research endeavors in the hopes of employing their exotic properties for various quantum-based technologies. Early investigations surrounding CDWs…

We investigate the macroscopic effects of charge density waves (CDW) and superconductivity in layered superconducting systems with broken lattice inversion symmetry (allowing for piezoelectricity) such as two dimensional (2D) transition…

Superconductivity · Physics 2009-11-10 B. Uchoa , A. H. Castro Neto , G. G. Cabrera

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 charge density wave (CDW) state in van der Waals systems shows interesting scaling phenomena as the number of layers can significantly affect the CDW transition temperature, $T_{CDW}$. However, it is often difficult to use conventional…

Surface confined electronic states provide a fertile ground for discovering emergent phenomena that have no counterpart in the bulk, offering new routes to manipulate correlations, symmetry breaking, and dimensionality at the atomic scale.…