Role of charge-density-wave fluctuations on the spectral function in a metallic charge-density-wave system

Yokoya, Takayoshi; Kawamata, Takayuki; Chainani, A.; Shin, Shik; Yamaya, K.

doi:10.1103/physrevb.71.140504

Cited by 74 publications

(84 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In most quasi-1D and some quasi-2D systems, a good agreement between the CDW wave vector q cdw and q n has indeed been found [12,25,26], in support of the Peierls picture.…”

Section: Introductionmentioning

confidence: 51%

“…of two main sectors as has been previously reported [12,18]: A quasi-1D sector forms nearly parallel slabs running perpendicular to a * , which would indeed favor nesting with form a chain-like structure along the a axis ( Fig. 1(a)).…”

Section: E Momentum-resolved Phonon-electron Coupling Matrix Elementsmentioning

confidence: 61%

“…One may note, however, that even in a simple quasi-1D system, the Peierls picture lacks such predicting power as to identify lattice distortions that are associated with the CDW order. Moreover, CDW energy gaps are often found on only certain parts of the Fermi surface [12,25], even when the remaining parts of the Fermi surface are equally-well nested, which cannot be explained by the Peierls picture. These inadequacies have motivated us to perform a detailed study of phononelectron coupling in the prototypical quasi-1D CDW compound ZrTe 3 .…”

Section: Introductionmentioning

confidence: 99%

“…The recent discovery of ubiquitous charge-ordering phenomena in cuprate high-temperature superconductors [1][2][3][4][5][6][7] has aroused new interest in this problem, since a thorough and generic understanding of the formation of CDW order, even in simple metals, may shed light on several important issues relevant to the enigma of high-temperature superconductivity. In particular, the so-called pseudogap phenomena in underdoped cuprates [8,9], which precede superconductivity upon cooling, resemble the opening of partial electronic energy gaps on certain parts of Fermi surfaces in CDW metals [10][11][12]. While long-range static CDW order appears to compete with superconductivity [2,5,13], short-range CDW correlations are present over a substantial range of carrier concentrations [2,14] that support the appearance of superconductivity, which points to the intriguing possibility that the two phases might share a common microscopic origin.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Charge density waves and phonon-electron coupling inZrTe3

Zheng

Ren

et al. 2015

Phys. Rev. B

View full text Add to dashboard Cite

Charge-density-wave (CDW) order has long been interpreted as arising from a Fermi-surface instability in the parent metallic phase. While phonon-electron coupling has been suggested to influence the formation of CDW order in quasi-two-dimensional (quasi-2D) systems, the presumed dominant importance of Fermi-surface nesting remains largely unquestioned in quasi-1D systems.Here we show that phonon-electron coupling is also important for the CDW formation in a model quasi-1D system ZrTe 3 . Our joint experimental and computational study reveals that particular lattice vibrational patterns possess exceedingly strong coupling to the conduction electrons, and are directly linked to the lattice distortions associated with the CDW order. The dependence of the coupling matrix elements on electron momentum further dictates the opening of (partial) electronic gaps in the CDW phase. Since lattice distortions and electronic gaps are the defining signatures of CDW order, our result demonstrates that the conventional wisdom based on Fermisurface geometry needs to be substantially supplemented by phonon-electron coupling even in the simplest quasi-1D case. As prerequisites for the CDW formation, the highly anisotropic electronic structure and strong phonon-electron coupling in ZrTe 3 give rise to a distinct Raman scattering effect, namely, measured phonon linewidths depend on the direction of momentum transfer in the scattering process.

show abstract

“…In most quasi-1D and some quasi-2D systems, a good agreement between the CDW wave vector q cdw and q n has indeed been found [12,25,26], in support of the Peierls picture.…”

Section: Introductionmentioning

confidence: 51%

Section: E Momentum-resolved Phonon-electron Coupling Matrix Elementsmentioning

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Charge density waves and phonon-electron coupling inZrTe3

Zheng

Ren

et al. 2015

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

“…Occurrences of the pseudogap for an incommensurate (or short range ordered) state, which finally develops into a true CDW band gap below T CDW , are well documented. [16][17][18][19] In the case of 1D systems other than Y-123, modifications to the spectral function with the onset of the CDW state have been detected as well. [20][21][22] the emergence of a pseudogap-like state is also expected in theory and can be understood as a result of a fluctuating Peierls order parameter.…”

mentioning

confidence: 89%

Pseudogap in the chain states of YBa2Cu3O6.6

et al. 2012

View full text Add to dashboard Cite

As established by scanning tunneling microscopy (STM) cleaved surfaces of the high temperature superconductor YBa 2 Cu 2 O 7−δ develop charge density wave (CDW) modulations in the one-dimensional (1D) CuO chains. At the same time, no signatures of the CDW have been reported in the spectral function of the chain band previously studied by photoemission. We use soft X-ray angle resolved photoemission (SX-ARPES) to detect a chain-derived surface band that had not been detected in previous work. The 2k F for the new surface band is found to be 0.55 Å −1 , which matches the wave vector of the CDW observed in direct space by STM. This reveals the relevance of the Fermi surface nesting for the formation of CDWs in the CuO chains in YBa 2 Cu 2 O 7−δ . In agreement with the short range nature of the CDW order the newly detected surface band exhibits a pseudogap, whose energy scale also corresponds to that observed by STM. PACS numbers: 71.45.Lr , 74.72.Kf, 79.60.Jv The CuO chain structure in YBa 2 Cu 2 O 7−δ (Y-123) provides a physical realization of a quasi-one-dimensional electronic system with non-vanishing coupling to the CuO 2 bilayers. 1,2 One of the reasons why 1D electronic systems remain in the focus of solid state research is that even weak interactions transform the quasi-particles of Fermi liquid theory into collective excitations of density wave type. [3][4][5] In particular, the peculiar topological structure of the chain Fermi surface (FS) makes this electronic system prone to formation of charge density wave via the Peierls instability. 6 Indeed, charge density modulations along the Cu-O chains have been extensively studied probing cleaved surfaces of Y-123 in direct space with scanning tunneling microscopy. [7][8][9][10][11][12][13][14][15] It has been shown that Y-123 crystals cleave between the CuO chains and the BaO layer, so that the chains turn out to be the nearest to the surface building block. 7,9,10,15 Both the earliest 9 and the most recent studies 14 present a consistent picture of a CDW, appearing as corrugations of the electronic density with a short correlation range of about 40 Å and a period between 9 and 14 Å, depending on the sample stoichiometry.In the case of 2D systems, the effect of CDW on the electronic states in the reciprocal space has been examined in great detail with modern angle resolved spectroscopy, which provides both momentum and energy resolution when measuring the one particle spectral function. Occurrences of the pseudogap for an incommensurate (or short range ordered) state, which finally develops into a true CDW band gap below T CDW , are well documented. [16][17][18][19] In the case of 1D systems other than Y-123, modifications to the spectral function with the onset of the CDW state have been detected as well. 20-22 the emergence of a pseudogap-like state is also expected in theory and can be understood as a result of a fluctuating Peierls order parameter. [23][24][25][26][27] At the same time, despite the abundant evidence for charge modulations in direct spa...

show abstract

Bibliography

2011

Elements of Modern X‐ray Physics

View full text Add to dashboard Cite

Role of charge-density-wave fluctuations on the spectral function in a metallic charge-density-wave system

Cited by 74 publications

References 33 publications

Charge density waves and phonon-electron coupling inZrTe3

Charge density waves and phonon-electron coupling inZrTe3

Pseudogap in the chain states of YBa2Cu3O6.6

Bibliography

Contact Info

Product

Resources

About