Recent Advances in Unconventional Density Waves

Abstract

Unconventional density wave (UDW) has been speculated as a possible electronic ground state in excitonic insulator in 1968. Recent surge of interest in UDW is partly due to the proposal that the pseudogap phase in high T_c cuprate superconductors is d-wave density wave (d-DW). Here we review our recent works on UDW within the framework of mean field theory. In particular we have shown that many properties of the low temperature phase (LTP) in alpha-(BEDT-TTF)_2MHg(SCN)_4 with M=K, Rb and Tl are well characterized in terms of unconventional charge density wave (UCDW). In this identification the Landau quantization of the quasiparticle motion in a magnetic field (the Nersesyan effect) plays the crucial role. Indeed the angular dependent magnetoresistance and the negative giant Nernst effect are two hallmarks of UDW.

18 pages, 12 figures

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• Hidden Order in the Cuprates
• Angular Position of Nodes in the Superconducting Gap of Quasi-2D Heavy-Fermion Superconductor CeCoIn_5
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• Entropy of vortex cores on the border of the superconductor-to-insulator transition in an underdoped cuprate
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• Thermodynamics and optical conductivity of unconventional spin density waves
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• Micromagnetism in URu2Si2 and high temperature superconductors
• Threshold electric field in unconventional density waves
• The magnetic field dependence of the threshold electric field in unconventional charge density waves
• Magnetothemopower study of quasi two-dimensional organic conductor $\alpha$-(BEDT-TTF)${}_2$KHg(SCN)${}_4$
• Magnetothermopower and Nernst effect in unconventional charge density waves
• The angular dependent magnetoresistance in alpha-(BEDT-TTF)_2KHg(SCN)_4
• Unconventional spin density wave in (TMTSF)2PF6 below T* ~ 4K
• Impurity scattering in unconventional density waves
• Impurity effects in unconventional density waves in the unitary limit

Cited by in corpus (16)

• Electronic crystals: an experimental overview
• Superconducting pairing and density-wave instabilities in quasi-one-dimensional conductors
• Optical Response for the d-density wave model
• Optical-conductivity sum rule in cuprates and unconventional charge density waves: a short review
• High-Tc Cuprate Superconductivity in a Nutshell
• Unconventional density wave in CeCoIn_5?
• Dynamical spin susceptibility and the resonance peak in the pseudogap region of the underdoped cuprate superconductors
• Gossamer Superconductivity, New Paradigm?
• Scaling Behavior of Angular Dependent Resistivity in CeCoIn${}_5$: Possible Evidence for d-Wave Density Waves
• Magnetotransport in d-wave density waves
• Interplay between the glassy transition and granular superconductivity in organic materials
• Local density of states and Friedel oscillations around a non-magnetic impurity in unconventional density wave
• The pseudogap phase in (TaSe_4)_2I
• Collective excitations in unconventional charge-density wave systems
• Unconventional spin density wave in Bechgaard salt (TMTSF)2NO3
• Gapped optical excitations from gapless phases: imperfect nesting in unconventional density waves