The study of electronic nematicity in an overdoped (Bi, Pb)2Sr2CuO6+δ superconductor using scanning tunneling spectroscopy

Zheng, Yuan; Fu, Ying; Bu, Kunliang; Zhang, Wenhao; Ding, Ying; Zhou, Xianju; Hoffman, Jennifer; Yin, Yi

doi:10.1038/s41598-017-08376-1

Cited by 19 publications

(40 citation statements)

References 27 publications

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“…In addition, we observed orbital nematicity, due to an asymmetry in the charge distribution between the p x and p y orbitals in agreement with results from STM experiments. 43,44 Focusing on the copper d-orbital the nematicity observed with Resonant X-ray Scattering in the striped phase of (La,M) 2 CuO 4 45 was also found in our analysis. Using 8×8 clusters, and by focusing on the absolute value of the nematic order parameter, we unveiled tendencies towards half-filled stripes even in square clusters: the average over long runs appears featureless but by using absolute values it can be shown that there is nematicity even in square clusters.…”

Section: Discussionsupporting

confidence: 74%

“…In addition, the previously mentioned STM experiments 43,44 did not observe nematicity associated with the d orbitals. However, the results of Resonant X-ray Scattering in the stripe phase of (La,M) 2 CuO 4 (M =Sr, Ba, Eu, or Nd) 45 reported nematicity in the d orbitals.…”

Section: B Nematicitymentioning

confidence: 48%

“…Scanning tunneling microscopy (STM) experiments have reported intracell nematicity in the p orbitals in underdoped Bi 2 Sr 2 CaCu 2 O 8+δ (Bi-2212) 43 and in the overdoped regime of (Bi,Pb) 2 Sr 2 CuO 6+δ (Bi-2201). 44 The nematicity found was attributed to inequivalence in the electronic structure at the two oxygen sites within each unit cell, but the experiments could not disentangle whether it was of charge or magnetic origin. Our results indicate that the nematicity arises from a charge difference among the intracell p σ orbitals.…”

Section: B Nematicitymentioning

confidence: 99%

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Half-filled stripes in a hole-doped three-orbital spin-fermion model for cuprates

2019

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Using Monte Carlo techniques, we study a three-orbital CuO2 spin-fermion model for copperbased high critical temperature superconductors that captures the charge-transfer properties of these compounds. Our studies reveal the presence of spin order in the parent compound and, more importantly, stripe spin and charge order under hole doping. Due to the p-d orbital hybridization, the added holes are approximately equally distributed among the two p orbitals of the oxygen atoms and the d orbital of the copper atoms in the unit cell. In rectangular clusters of dimension 16 × 4 half-filled stripes are observed upon hole doping, namely when N h = 2n holes are introduced in the system then n vertical stripes of length 4 along the short periodic direction are formed. The original antiferromagnetic order observed in the parent compound develops a π−shift across each stripe and the magnetic structure factor has a peak at wavevector k = (π −δ, π) with δ = 2πN h /N = πN h /2L, where L = 16. The electronic charge is also modulated and the charge structure factor is maximized at k = (2δ, 0). As electrons are removed from the system, intracell orbital nematicity with np x − np y = 0 develops in the oxygen sector, as well as intercell magnetic nematicity with S z i,d (S z i+x,d − S z i+y,d ) = 0 in the spin copper sector, in the standard notation. This occurs not only in rectangular but also in square 8×8 lattices. Our results suggest that the essence of the stripe spin and charge distribution experimentally observed in hole-doped cuprates are captured by unbiased Monte Carlo studies of a simple hole-doped charge-transfer insulator CuO2 spin-fermion model.

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Section: Discussionsupporting

confidence: 74%

Section: B Nematicitymentioning

confidence: 48%

Section: B Nematicitymentioning

confidence: 99%

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Half-filled stripes in a hole-doped three-orbital spin-fermion model for cuprates

2019

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“…STM measurements were carried out in a commercial ultrahigh-vacuum system [32,[37][38][39]. An electrochemically etched tungsten tip was treated with field emission on a single crystal of the Au (111) surface.…”

Section: Experimental Methodsmentioning

confidence: 99%

Projective quasiparticle interference of a single scatterer to analyze the electronic band structure of ZrSiS

Zhang

et al. 2020

Phys. Rev. Research

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Quasiparticle interference (QPI) of the electronic states has been widely applied in scanning tunneling microscopy to analyze the electronic band structure of materials. Single-defect-induced QPI reveals defectdependent interaction between a single atomic defect and electronic states, which deserves special attention. Due to the weak signal of single-defect-induced QPI, the signal-to-noise ratio is relatively low in a standard twodimensional QPI measurement. In this paper, we introduce a projective quasiparticle interference (PQPI) method in which a one-dimensional measurement is taken along high-symmetry directions centered on a specified defect. We apply the PQPI method to the topological nodal-line semimetal ZrSiS. We focus on two special types of atomic defects that scatter the surface and bulk electronic bands. With an enhanced signal-to-noise ratio in PQPI, the energy dispersions are clearly resolved along high-symmetry directions. We discuss the defect-dependent scattering of bulk bands with the nonsymmorphic symmetry-enforced selection rules. Furthermore, an energy shift of the surface floating band is observed, and a branch of energy dispersion (q 6) is resolved. This PQPI method can be applied to other complex materials to explore defect-dependent interactions in the future.

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“…The existence of CDWs in high-T c oxides has been recently confirmed by various experimental methods, including direct scanning-tunnel-microscopy (STM) and x-ray diffraction ones. In particular, CDWs were revealed in holedoped La 2−xBax CuO 4 [49], YBa 2 Cu 3 O 7−δ [16,[50][51][52][53][54][55][56][57][58][59][60], Bi 2 Sr 2−xLax CuO 6+δ [61], (Bi, Pb) 2 Sr 2 CuO 6+δ [62], and Bi 2 Sr 2 CaCuO 8+δ [16,56,[63][64][65][66] cuprates, as well as in electron-doped Nd 2−x Ce x CuO 4 ones [67]. The observed CDWs have either a unidirectional (stripe-like) or a bidirectional (checkerboard-like) structure.…”

Section: Introductionmentioning

confidence: 99%

Quasiparticle conductance-voltage characteristics for break junctions involvingd-wave superconductors: charge-density-wave effects

Ekino¹,

Gabovich²,

Li³

et al. 2017

J. Phys.: Condens. Matter

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Quasiparticle tunnel conductance-voltage characteristics (CVCs), [Formula: see text], were calculated for break junctions (BJs) made up of layered d-wave superconductors partially gapped by charge-density waves (CDWs). The current is assumed to flow in the ab-plane of electrodes. The influence of CDWs is analyzed by comparing the resulting CVCs with CVCs calculated for BJs made up of pure d-wave superconductors with relevant parameters. The main CDW-effects were found to be the appearance of new CVC peculiarities and the loss of CVC symmetry with respect to the V-sign. Tunnel directionality was shown to be one of the key factors in the formation of [Formula: see text] dependences. In particular, the orientation of electrodes with respect to the current channel becomes very important. As a result, [Formula: see text] can acquire a large variety of forms similar to those for tunnel junctions between superconductors with s-wave, d-wave, and mixed symmetry of their order parameters. The diversity of peculiarities is especially striking at finite temperatures. In the case of BJs made up of pure d-wave superconductors, the resulting CVC can include a two-peak gap-driven structure. The results were compared with the experimental BJ data for a number of high-T oxides. It was shown that the large variety of the observed current-voltage characteristics can be interpreted in the framework of our approach. Thus, quasiparticle tunnel currents in the ab-plane can be used as an additional mean to detect CDWs competing with superconductivity in cuprates or other layered superconductors.

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The study of electronic nematicity in an overdoped (Bi, Pb)2Sr2CuO6+δ superconductor using scanning tunneling spectroscopy

Cited by 19 publications

References 27 publications

Half-filled stripes in a hole-doped three-orbital spin-fermion model for cuprates

Half-filled stripes in a hole-doped three-orbital spin-fermion model for cuprates

Projective quasiparticle interference of a single scatterer to analyze the electronic band structure of ZrSiS

Quasiparticle conductance-voltage characteristics for break junctions involvingd-wave superconductors: charge-density-wave effects

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