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Broken time-reversal symmetry in the absence of spin order indicates the presence of unusual phases such as orbital magnetism and loop currents. The recently discovered family of kagome superconductors AV$_3$Sb$_5$ (A = K, Rb, or Cs),…

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…

We discuss the interplay between electronic correlations and an underlying superlattice structure in determining the period of charge density waves (CDW's), by considering a one-dimensional Hubbard model with a repeated (non-random) pattern…

Strongly Correlated Electrons · Physics 2009-11-11 Andre L Malvezzi , Thereza Paiva , Raimundo R dos Santos

Superconductivity in the cuprates is found to be intertwined with charge and spin density waves. Determining the interactions between the different types of order is crucial for understanding these important materials. Here, we elucidate…

We report a low-temperature scanning tunneling microscopy study of the charge density wave (CDW) order in 1$T$-TiSe$_2$ and Cu$_{0.08}$TiSe$_2$. In pristine 1$T$-TiSe$_2$ we observe a long-range coherent commensurate CDW (C-CDW) order. In…

Superconductivity · Physics 2017-03-14 Shichao Yan , Davide Iaia , Emilia Morosan , Eduardo Fradkin , Peter Abbamonte , Vidya Madhavan

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…

We use scanning tunneling microscopy to study the domain structure of the nearly-commensurate charge density wave (NC-CDW) state of 1T-TaS$_2$. In our sub-angstrom characterization of the state, we find a continual evolution of the CDW…

Strongly Correlated Electrons · Physics 2022-08-31 Manoj Singh , Boning Yu , James Huber , Bishnu Sharma , Ghilles Ainouche , Ling Fu , Jasper van Wezel , Michael C. Boyer

To understand complex physics of a system with strong electron electron interactions, it is ideal to control and monitor its properties while tuning an external electric field applied to the system. Indeed, complete electric field control…

Strongly Correlated Electrons · Physics 2016-07-18 Linjun Li , Eoin C. T. O Farrell , Kianping Loh , Goki Eda , Barbaros Ozyilmaz , Antonio H. Castro Neto

The nature of spin density wave (SDW) and charge density wave (CDW) in the mixed state of high T_c superconductors (HTS) is investigated by using the self-consistent Bogoliubov-de Gennes equations and an effective model Hamiltonian with…

Superconductivity · Physics 2009-11-07 Yan Chen , H. Y. Chen , C. S. Ting

We discuss deformation of quasi 1-dimensional conductors with charge-density wave (CDW) under the electric field deforming the CDW. In case of ``strong'' CDW-lattice interaction the effect can be treated in terms of the converse…

Strongly Correlated Electrons · Physics 2009-11-13 V. Ya. Pokrovskii

The kagome superconductor CsV$_3$Sb$_5$ hosts a variety of charge density wave (CDW) phases, which play a fundamental role in the formation of other exotic electronic instabilities. However, identifying the precise structure of these CDW…

Transition metal dichalcogenides host a wide variety of lattice and electronic structures, as well as corresponding exotic physical properties, especially under certain tuning conditions. Here, we are the first to report the observation of…

The Kagome material $A{\mathrm{V}}_3{\mathrm{Sb}}_5$ ($A$ = K, Rb, Cs) with geometry frustration hosts non-trivial topological electronic structures, electronic nematicity, charge density wave (CDW) and superconductivity, providing an ideal…

Superconductivity · Physics 2023-07-07 Qian Xiao , Qizhi Li , Jinjin Liu , Yongkai Li , Wei Xia , Xiquan Zheng , Yanfeng Guo , Yugui Yao , Zhiwei Wang , Yingying Peng

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 wave (CDW) and their interplay with correlated and topological quantum states are forefront of condensed matter research. The 4$H_{b}$-TaS$_2$ is a CDW ordered quantum heterostructure that is formed by alternative stacking of…

The charge-density-wave (CDW) mechanism of the 3D quantum Hall effect has been observed recently in ZrTe$_5$ [Tang et al., Nature 569, 537 (2019)]. Different from previous cases, the CDW forms on a one-dimensional (1D) band of Landau…

Mesoscale and Nanoscale Physics · Physics 2020-11-18 Fang Qin , Shuai Li , Z. Z. Du , C. M. Wang , Wenqing Zhang , Dapeng Yu , Hai-Zhou Lu , X. C. Xie

Understanding the role of charge density wave (CDW) in high-temperature superconductivity is a longstanding challenge in condensed matter physics. We construct a holographic superconductor model in which the $U(1)$ symmetry is spontaneously…

High Energy Physics - Theory · Physics 2021-01-04 Yi Ling , Peng Liu , Meng-He Wu

The charge density wave (CDW) in solids is a collective ground state combining lattice distortions and charge ordering. It is defined by a complex order parameter with an amplitude and a phase. The amplitude and wavelength of the charge…

Strongly Correlated Electrons · Physics 2019-11-27 Árpád Pásztor , Alessandro Scarfato , Marcello Spera , Céline Barreteau , Enrico Giannini , Christoph Renner

Charge density wave (CDW) is a periodic modulation of electronic charge leading to a reconstruction of the lattice, an emergence of zone folded mode along with collective excitations.1 Transition metal chalcogenides have shown a great…

Materials Science · Physics 2023-11-07 Divya Rawat , Juhi Pandey , Ajay Soni

The discovery of multiple charge-density-wave (CDW) orders in superconducting cuprates and Kagome CsV3Sb5 has offered a unique milieu for studying the interplay of CDW and superconductivity and altered our perspective on their nature. Here,…

Superconductivity · Physics 2023-10-06 Shuyang Wang , Qing Wang , Chao An , Yonghui Zhou , Ying Zhou , Xuliang Chen , Ning Hao , Zhaorong Yang