Journal ArticleDOI
Direct observation of melted Mott state evidenced from Raman scattering in 1T-TaS 2 single crystal
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TLDR
In this paper, the evolution of electron correlation and charge density wave (CDW) in 1T-TaS2 single crystal has been investigated by temperature-dependent Raman scattering, which undergoes two obvious peaks of A 1g modes about 70.8 cm−1 and 78.7 cm −1 at 80 K, respectively.Abstract:
The evolution of electron correlation and charge density wave (CDW) in 1T-TaS2 single crystal has been investigated by temperature-dependent Raman scattering, which undergoes two obvious peaks of A 1g modes about 70.8 cm−1 and 78.7 cm−1 at 80 K, respectively. The former peak at 70.8 cm−1 is accordant with the lower Hubbard band, resulting in the electron-correlation-driven Mott transition. Strikingly, the latter peak at 78.7 cm−1 shifts toward low energy with increasing the temperature, demonstrating the occurrence of nearly commensurate CDW phase (melted Mott phase). In this case, phonon transmission could be strongly coupled to commensurate CDW lattice via Coulomb interaction, which likely induces appearance of hexagonal domains suspended in an interdomain phase, composing the melted Mott phase characterized by a shallow electron pocket. Combining electronic structure, atomic structure, transport properties with Raman scattering, these findings provide a novel dimension in understanding the relationship between electronic correlation, charge order, and phonon dynamics.read more
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Stable Flatbands, Topology, and Superconductivity of Magic Honeycomb Networks.
Jongjun M. Lee,Chenhua Geng,Jae Whan Park,Masaki Oshikawa,Sung-Sik Lee,Sung-Sik Lee,Han Woong Yeom,Gil Young Cho +7 more
TL;DR: It is shown that corner states, which are a hallmark of the higher-order topological insulators, appear in the network superstructure, and can naturally explain the enhanced superconductivity of 1T-TaS_{2} with the honeycomb network of conducting domain walls.
Journal ArticleDOI
Doublonlike Excitations and Their Phononic Coupling in a Mott Charge-Density-Wave System
TL;DR: By injecting electrons into the Mott state of tantalum disulfide, experiments reveal new, unexpected electronic behaviors that could shed light on the underlying interactions that create this exotic state as mentioned in this paper.
Journal ArticleDOI
Photoinduced phase transitions in two-dimensional charge-density-wave 1T-TaS2*
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Impeded phase transition in 1T-TaS2: Thermoelectric fingerprint of long-lived mixed states
Katarzyna Ludwiczak,E. Lacinska,J. Binder,I. Lutsyk,M. Rogala,P. Dabrowski,Zbigniew Klusek,Roman Stepniewski,Andrzej Wysmołek +8 more
TL;DR: In this paper, the influence of micrometer scale laser illumination on the global electric properties of a bulk sample was investigated and it was shown that a specific temperature sweep can impede the phase transition, allowing to study long-lived mixed states, consisting of two phases.
Journal ArticleDOI
Charge Density Wave States in Phase-Engineered Monolayer VTe2
Zhi-Li Zhu,Zhong-Liu Liu,Xu Wu,Xuanyi Li,Jin An Shi,Guojian Qian,Qi Zheng,Li Huang,Xiao Lin,Jiaou Wang,Hui Chen,Wu Zhou,Jia-Tao Sun,Yeliang Wang +13 more
TL;DR: In this article , the phase transition between T- and H-H-VTe2 was revealed with X-ray photoelectron spectroscopy (XPS) and scanning transmission electron microscopy (STEM) measurements.
References
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Journal ArticleDOI
Angle-resolved photoemission studies of the cuprate superconductors
TL;DR: A review of the most recent ARPES results on the cuprate superconductors and their insulating parent and sister compounds is presented in this article, with the purpose of providing an updated summary of the extensive literature.
Journal ArticleDOI
Correlated electrons in high-temperature superconductors
TL;DR: Theoretical ideas and experimental results concerning high-temperature superconductors are reviewed in this article, with special emphasis on calculations performed with the help of computers applied to models of strongly correlated electrons proposed to describe the two-dimensional Cu${\mathrm{O}}_{2} planes.
Journal ArticleDOI
Charge-density waves and superlattices in the metallic layered transition metal dichalcogenides
TL;DR: In this paper, it was shown that charge-density waves and their concomitant periodic structural distortions occur in all the 4d1/5d1 dichalcogenides and related the observed periodicities of these CDW states to the theoretical form of the parent Fermi surfaces.
Journal ArticleDOI
Magnetically mediated superconductivity in heavy fermion compounds
Neil D. Mathur,F. M. Grosche,Stephen Julian,I. R. Walker,D. M. Freye,R. K. W. Haselwimmer,G. G. Lonzarich +6 more
TL;DR: In this article, it was shown that the charge carriers are bound together in pairs by magnetic spin-spin interactions in heavy fermion superconductors CePd2Si2 and CeIn3.
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Band Structures of Transition-Metal-Dichalcogenide Layer Compounds.
TL;DR: In this article, the nonrelativistic augmented plane wave (APW) method is applied to calculate the electronic band structures of several transition-metal-dichalcogenide (T{X}_{2}$) layer compounds.