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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…

Strongly Correlated Electrons · Physics 2007-05-23 D. N. Aristov , R. Zeyher

We report on sliding Charge Density Wave (CDW) in the quasi two-dimensional TbTe$_3$ system probed by coherent x-ray diffraction combined with {\it in-situ} transport measurements. We show that the non-Ohmic conductivity in TbTe$_3$ is made…

Strongly Correlated Electrons · Physics 2025-01-08 D. Le Bolloc'h , A. A. Sinchenko , V. L. R. Jacques , L. Ortega , J. E. Lorenzo , G. Chahine , . Lejay , P. Monceau

As superconductors are thinned down to the 2D limit, their critical temperature $T_c$ typically decreases. Here we report the opposite behavior, a substantial enhancement of $T_c$ with decreasing thickness, in 2D crystalline superconductor…

The coexistence of charge density wave (CDW) and superconductivity in tantalum disulfide (2H-TaS$_2$) at ambient pressure, is boosted by applying hydrostatic pressures up to 30GPa, thereby inducing a typical dome-shaped superconducting…

Recently we have shown that the striking angular dependent magnetoresistance in the low temperature phase (LTP) of alpha-(BEDT-TTF)_2KHg(SCN)_4 is consistently described in terms of unconventional charge density wave (UCDW). Here we…

Strongly Correlated Electrons · Physics 2009-11-10 Balázs Dóra , Kazumi Maki , András Ványolos , Attila Virosztek

The anisotropic and non-linear transport properties of the quasi one-dimensional organic conductor (TMTSF)_2PF_6 have been studied by dc, radiofrequency, and microwave methods. Microwave experiments along all three axes reveal that…

Strongly Correlated Electrons · Physics 2010-10-05 P. Zornoza , K. Petukhov , M. Dressel , N. Biskup , T. Vuletic , S. Tomic

The charge density wave (CDW) transition temperature in the quasi-one dimensional (Q1D) organic material of (Per)$_2$Au(mnt)$_2$ is relatively low (TCDW = 12 K). Hence in a mean field BCS model, the CDW state should be completely suppressed…

Strongly Correlated Electrons · Physics 2009-11-10 D. Graf , J. S. Brooks , E. S. Choi , S. Uji , J. C. Dias , M. Almeida , M. Matos

While the spin dynamics of La$_{0.7}$Ca$_{0.3}$MnO$_3$ in the ferromagnetic phase are known to be unconventional, previous measurements have yielded contradictory results regarding the damping of spin wave excitations. Neutron spectroscopy…

Strongly Correlated Electrons · Physics 2017-09-18 Joel S. Helton , Susumu K. Jones , Daniel Parshall , Matthew B. Stone , Dmitry A. Shulyatev , Jeffrey W. Lynn

Charge density wave (CDW) is discovered within a wide interval in solids, however, its microscopic nature is still not transparent in most realistic materials, and the recently studied chiral ones with chiral structural distortion remain…

Materials Science · Physics 2024-12-11 Shuai Zhang , Kaifa Luo , Tiantian Zhang

We develop the mean-field theory of a charge-density wave (CDW) state in magnetic field and study the properties of this state below the transition temperature. We show that the CDW state with shifted wave vector in high magnetic field…

Strongly Correlated Electrons · Physics 2007-05-23 P. D. Grigoriev , D. S. Lyubshin

The phase transition between charge- and spin-density-wave (CDW, SDW) phases is studied in the one-dimensional extended Hubbard model at half-filling. We discuss whether the transition can be described by the Gaussian and the spin-gap…

Strongly Correlated Electrons · Physics 2009-10-31 Masaaki Nakamura

The occurrence of charge density wave (CDW) phenomena, particularly in low dimensional rare-earth chalcogenides, has attracted substantial research interest. Among these materials, EuTe4, which features multiple Te layers and a single Eu-Te…

We report a strong difference in the sliding properties of the bidirectional charge density wave (CDW) in the two-dimensional rare earth tritelluride ErTe$_3$ which occurs below $T_{CDW1}=265$ K with a wave vector along $c$-axis and below…

Strongly Correlated Electrons · Physics 2016-07-20 A. A. Sinchenko , P. Lejay , O. Leynaud , P. Monceau

We carefully investigated the transport and capacitance properties of few layer charge density wave (CDW) 2H-TaS2 devices. The CDW transition temperature and the threshold voltage vary from device to device, which is attributed to the…

Mesoscale and Nanoscale Physics · Physics 2015-06-22 Y. F. Cao , K. M. Cai , L. J. Li , W. J. Lu , Y. P. Sun , K. Y. Wang

In a previous paper we suggested that a macroscopic force field applied across a two-dimensional electron gas channel could induce a microscopic charge density wave as soon as the proper compressibility becomes negative, which happens at…

Mesoscale and Nanoscale Physics · Physics 2020-11-24 Erica Hroblak , Mohammad Zarenia , Giovanni Vignale

We study phenomena driven by electron-electron interactions in the minimally twisted bilayer graphene (mTBLG) with a perpendicular electric field. The low-energy degrees of freedom in mTBLG are governed by a network of one-dimensional…

Strongly Correlated Electrons · Physics 2021-07-29 Yang-Zhi Chou , Fengcheng Wu , Jay D. Sau

We report a rectangular charge density wave (CDW) phase in strained 1T-VSe$_2$ thin films synthesized by molecular beam epitaxy on c-sapphire substrates. The observed CDW structure exhibits an unconventional rectangular…

The results of low temperature thermoelectric power and the specific heat of 1T-VSe2 (Vanadium diselenide) have been reported along with the electrical resistivity, and Hall coefficient of the compound. The Charge Density Wave (CDW)…

Materials Science · Physics 2015-05-13 C. S. Yadav , A. K. Rastogi

The low temperature phase (LTP) of alpha-(BEDT-TTF)_2KHg(SCN)_4 salt is known for its surprising angular dependent magnetoresistance (ADMR), which has been studied intensively in the last decade. However, the nature of the LTP has not been…

Strongly Correlated Electrons · Physics 2009-11-07 Kazumi Maki , Balázs Dóra , Mark Kartsovnik , Attila Virosztek , Bojana Korin-Hamzic , Mario Basletic

Altermagnets recently came into the spotlight as a new class of magnetic materials, arising as a consequence of specific crystal symmetries. They are characterized by a spin-polarized electronic band structure similar to ferromagnets, but…