Interplay between unidirectional and bidirectional charge-density-wave orders in underdoped cuprates

Charge density wave (CDW) order has been shown to compete and coexist with superconductivity in underdoped cuprates. Theoretical proposals for the CDW order include an unconventional d-symmetry form factor CDW, evidence for which has emerged from measurements, including resonant soft x-ray scattering (RSXS) in YBa2Cu3O6+x (YBCO). Here, we revisit RSXS measurements of the CDW symmetry in YBCO, using a variation in the measurement geometry to provide enhanced sensitivity to orbital symmetry. We show that the (0 0.31 L) CDW peak measured at the Cu L edge is dominated by an s form factor rather than a d form factor as was reported previously. In addition, by measuring both (0.31 0 L) and (0 0.31 L) peaks, we identify a pronounced difference in the orbital symmetry of the CDW order along the a and b axes, with the CDW along the a axis exhibiting orbital order in addition to charge order.

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Model of phase fluctuations in a latticed-wave superconductor: Application to the Cooper-pair charge-density wave in underdoped cuprates

Physical Review B ◽

10.1103/physrevb.71.214511 ◽

2005 ◽

Vol 71 (21) ◽

Cited By ~ 47

Author(s):

Ashot Melikyan ◽

Zlatko Tešanović

Keyword(s):

Charge Density ◽

Charge Density Wave ◽

Cooper Pair ◽

Density Wave ◽

Phase Fluctuations ◽

Underdoped Cuprates

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Coexistence of Charge-Density-Wave and Pair-Density-Wave Orders in Underdoped Cuprates

Physical Review Letters ◽

10.1103/physrevlett.114.197001 ◽

2015 ◽

Vol 114 (19) ◽

Cited By ~ 71

Author(s):

Yuxuan Wang ◽

Daniel F. Agterberg ◽

Andrey Chubukov

Keyword(s):

Charge Density ◽

Charge Density Wave ◽

Density Wave ◽

Pair Density ◽

Underdoped Cuprates ◽

Pair Density Wave

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Interplay between pair- and charge-density-wave orders in underdoped cuprates

Physical Review B ◽

10.1103/physrevb.91.115103 ◽

2015 ◽

Vol 91 (11) ◽

Cited By ~ 50

Author(s):

Yuxuan Wang ◽

Daniel F. Agterberg ◽

Andrey Chubukov

Keyword(s):

Charge Density ◽

Charge Density Wave ◽

Density Wave ◽

Underdoped Cuprates

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Charge-density-wave ordering in the stripe phase of underdoped cuprates

Superconductor Science and Technology ◽

10.1088/0953-2048/13/9/315 ◽

2000 ◽

Vol 13 (9) ◽

pp. 1378-1381 ◽

Cited By ~ 9

Author(s):

A Mourachkine

Keyword(s):

Charge Density ◽

Charge Density Wave ◽

Density Wave ◽

Stripe Phase ◽

Underdoped Cuprates

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Incommensurate modulated phases of the NbxTa1-xTe4 charge density wave system

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100120692 ◽

1992 ◽

Vol 50 (1) ◽

pp. 58-59

Author(s):

S. Ritchie ◽

J. C. Bennett ◽

A. Prodan ◽

F.W. Boswell ◽

J.M. Corbett

Keyword(s):

Charge Density ◽

Charge Density Wave ◽

Direct Evidence ◽

Density Wave ◽

Wave System ◽

Modulated Phases ◽

Metal Atoms ◽

Incommensurate Modulation ◽

End Members ◽

Modulation Wave Vector

A continuous sequence of compounds having composition NbxTa1-xTe4; 0 ≤ x ≤ 1 have been studied by electron diffraction and microscopy. Previous studies have shown that the end members of the series, TaTε4 and NbTε4 possess a quasi-one-dimensional character and exhibit charge density wave (CDW) distortions. In these compounds, the subcell structure is tetragonal with axes (a × a × c) and consists of the metal atoms (Nb or Ta) centered within an extended antiprismatic cage of Te atoms. At room temperature, TaTε4 has a commensurate modulation structure with a 2a × 2a × 3c unit cell. In NbTε4, an incommensurate modulation with × ∼ 16c axes is observed. Preliminary studies of the mixed compounds NbxTα1-xTε4 showed a discontinuous jump of the modulation wave vector commensurate to incommensurate when the Nb dopant concentration x, exceeded x ≃ 0.3, In this paper, the nature of the compositional dependence of is studied in greater detail and evidence is presented for a stepwise variation of . This constitutes the first direct evidence for a Devil's staircase in CDW materials.

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