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A charge-density-wave (CDW) is characterized by a dynamical order parameter consisting of a time-dependent amplitude and phase, which manifest as optically-active collective modes of the CDW phase. Studying the behaviour of such collective…

We analyze the stability of excitonic ground states in the two-band Hubbard model with additional electron-phonon and Hund's rule couplings using a combination of mean-field and variational cluster approaches. We show that both the…

强关联电子 · 物理学 2015-09-04 Tatsuya Kaneko , Bernd Zenker , Holger Fehske , Yukinori Ohta

The relation between atomic momenta fluctuations and density fluctuations is obtained in frames of mean-field approximation. Using two-time temperature Green functions within Tyablikov approximation the equations for spin excitation energy…

凝聚态物理 · 物理学 2016-09-07 I. Vakarchuk , V. Tkachuk , T. Kuliy

Based on a model Hamiltonian with a d-wave pairing interaction and a competing antiferromagnetic interaction, we numerically study the site dependence of the nuclear spin resonance (NMR) relaxation rate T_1^{-1} as a function of temperature…

超导电性 · 物理学 2007-05-23 Yan Chen , Jian-Xin Zhu , C. S. Ting

Two-dimensional (2D) ferromagnetic charge density wave (CDW), an exotic quantum state for exploring the intertwining effect between correlated charge and spin orders in 2D limit, has not been discovered in the experiments yet. Here, we…

材料科学 · 物理学 2023-04-25 Heng Jin , Jiabin Chen , Yang Li , Bin Shao , Bing Huang

Charge density waves with unconventional order parameters, for instance, with d-wave symmetry (DDW), may be relevant in the underdoped regime of high-T_c cuprates or other quasi-one or two dimensional metals. A DDW state is characterized by…

强关联电子 · 物理学 2007-05-23 D. N. Aristov , R. Zeyher

In most of charge density wave (CDW) systems of different material classes, ranging from traditional correlated systems in low-dimension to recent topological systems with Kagome lattice, superconductivity emerges when the system is driven…

The subtle interplay of band topology and symmetry broken phase, induced by electron correlations, has immense contemporary relevance and potentially offers novel physical insights. Here, we demonstrate charge density wave (CDW) in bulk…

介观与纳米尺度物理 · 物理学 2022-12-13 Abhishek Juyal , Vinod Kumar Dwivedi , Sonu Verma , Shibabrata Nandi , Amit Agarwal , Soumik Mukhopadhyay

The theory for the onset of spin density wave order in a metal in two dimensions flows to strong coupling, with strong interactions not only at the `hot spots', but on the entire Fermi surface. We advocate the computation of DC transport in…

强关联电子 · 物理学 2014-11-11 Aavishkar A. Patel , Subir Sachdev

Periodic spatial modulations of the superfluid density, or pair density waves, have now been widely detected in unconventional superconductors, either as the primary or the secondary states accompanying charge density waves. Understanding…

Using neutrons and x-rays we show the topological kagome antiferromagnet Mn$_3$Sn for $T<285$~K forms a homogeneous spin and charge ordered state comprising a longitudinally polarized spin density wave (SDW) with wavevector…

We study theoretically the low-temperature phases of a two-component atomic Fermi gas with attractive s-wave interactions under conditions of rapid rotation. We find that, in the extreme quantum limit, when all particles occupy the lowest…

介观与纳米尺度物理 · 物理学 2007-11-17 Gunnar Moller , Nigel R. Cooper

We study particle-hole instabilities in the framework of the spin-fermion (SF) model. In contrast to previous studies, we assume that adjacent hot spots can overlap due to a shallow dispersion of the electron spectrum in the antinodal…

强关联电子 · 物理学 2016-03-02 Pavel A. Volkov , Konstantin B. Efetov

Diffraction measurements performed via transmission electron microscopy and high resolution X-ray scattering reveal two distinct charge density wave transitions in Gd$_2$Te$_5$ at $T_{c1}$ = 410(3) and $T_{c2}$ = 532(3) K, associated with…

强关联电子 · 物理学 2008-08-18 K. Y. Shin , N. Ru , C. L. Condron , Y. Q. Wu , M. J. Kramer , M. F. Toney , I. R. Fisher

The two-loop renormalization group (RG) calculation is considerably extended here for the two-dimensional (2D) fermionic effective field theory model, which includes only the so-called "hot spots" that are connected by the spin-density-wave…

强关联电子 · 物理学 2015-06-18 Vanuildo S. de Carvalho , Hermann Freire

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,…

超导电性 · 物理学 2023-10-06 Shuyang Wang , Qing Wang , Chao An , Yonghui Zhou , Ying Zhou , Xuliang Chen , Ning Hao , Zhaorong Yang

Pd-intercalated ErTe$_3$ is studied as a model system to explore the effect of "intertwined" superconducting and charge density wave (CDW) orders. Despite the common wisdom that superconductivity emerges only when CDW is suppressed, we…

The discovery of a magnetic-field-induced charge-density-wave (CDW) order in the pseudogap state via nuclear magnetic resonance (NMR) studies has highlighted the importance of "charge" in the physics of high transition-temperature ($T_{\rm…

超导电性 · 物理学 2021-08-26 Shinji Kawasaki , Madoka Ito , Dai Kamijima , Chengtian Lin , Guo-qing Zheng

The quench dynamics of the Hubbard model in tilted and harmonic potentials is discussed within the semiclassical picture. Applying the fermionic truncated Wigner approximation (fTWA), the dynamics of imbalances for charge and spin degrees…

统计力学 · 物理学 2022-10-18 Aleksander Kaczmarek , Adam S. Sajna

We phenomenologically describe the thermodynamics of charge and spin density waves in doped high-$T_{c}$ oxides. We have explicitly calculated stable non-homogeneous solutions in the incompressible spin driven stripe phase, where stripes…

强关联电子 · 物理学 2007-05-23 B. Uchoa , G. G. Cabrera