The origin and non-quasiparticle nature of Fermi arcs in Bi2Sr2CaCu2O8+δ

Reber, T. J.; Plumb, N. C.; Sun, Zhe; Cao, Yue; Wang, Q.; McElroy, K.; Iwasawa, Hideaki; Arita, Masashi; Wen, Jinsheng; Xu, Zhijun; Gu, Genda; Yoshida, Yoshiyuki; Eisaki, H.; Aiura, Y.; Dessau, D. S.

doi:10.1038/nphys2352

Cited by 103 publications

(145 citation statements)

References 32 publications

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“…This assumption implies, in particular, that the poles of the spectral function, and hence also the hot-spots, will not change location as a function of temperature. This is not inconsistent with the empirical observation of temperature-dependent Fermi-arc length, which was recently explained to arise from the variation in temperature of a single parameter (the scattering rate Γ), without needing the rest of the bandstructure parameters (t, t , t , t pole , and ∆ PG ) to change with temperature [46].…”

Section: Supplementary Note 2 | Scanning Tunnelling Microscopymentioning

confidence: 62%

Charge Order Driven by Fermi-Arc Instability in Bi ₂ Sr _{2−
x} La _x CuO _6+δ

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et al. 2014

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An understanding of the nature of superconductivity in cuprates has been hindered by the apparent diversity of intertwining electronic orders in these materials. Here we combine resonant X-ray scattering (REXS), scanning-tunneling microscopy (STM), and angle-resolved photoemission spectroscopy (ARPES) to observe a charge order that appears consistently in surface and bulk, as well as momentum and real space, with the Bi2Sr2−xLaxCuO 6+δ cuprate family. The observed wavevector rules out simple antinodal nesting in the single particle limit, but matches well with a phenomenological model of a many-body instability of the Fermi arcs. Combined with earlier observations in other cuprate families, these findings suggest the existence of a generic charge-ordered state in underdoped cuprates, and uncover its connection to the pseudogap regime. PACS numbers:Since the discovery of cuprate high-temperature superconductors, several unconventional phenomena have been observed in the region of the phase diagram located between the strongly localized Mott insulator at zero doping and the itinerant Fermi-liquid state that emerges beyond optimal doping [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The so-called 'pseudogap' opens at the temperature T * and obliterates the Fermi surface at the antinodes (AN) of the d-wave superconducting gap function, leaving behind disconnected "Fermi arcs" centered around the nodes. In addition, charge order has been observed on the surface of Bi-and Clbased compounds [4][5][6][7][8], in the bulk of La-based compounds [9][10][11], and most recently in YBa 2 Cu 3 O 6+δ (YBCO) [17][18][19][20], indicating this might be the leading instability in underdoped cuprates. The similarity between the observed charge ordering wavevector and the antinodal nesting vector of the hightemperature Fermi surface has prompted suggestions that a conventional Peierls-like charge-density-wave (CDW) might be responsible for the opening of the pseudogap [7,8,12,19]. We use complementary bulk/surface techniques to examine the validity of this scenario, and explore the connection between charge ordering and fermiology.By applying a suite of complementary tools to a single cuprate material, Bi 2 Sr 2−x La x CuO 6+δ (Bi2201), we reveal that the charge order in this system emerges just below T * , and that its wavevector corresponds to the Fermi arc tips rather than the antinodal nesting vector. We quantify the Fermi surface using ARPES, and we look for charge modulations along the Cu-O bond directions in both real-and reciprocalspace, using STM and REXS. The single-layer Bi2201 is well suited to this purpose owing to: (i) its two-dimensionality and high degree of crystallinity [22,23], and (ii) the possibility of probing the temperature evolution across T * , which is bettercharacterized [15,16] and more accessible than in bilayer sys-

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Section: Supplementary Note 2 | Scanning Tunnelling Microscopymentioning

confidence: 62%

Charge Order Driven by Fermi-Arc Instability in Bi ₂ Sr _{2−
x} La _x CuO _6+δ

Comin

Frañó

Yee

et al. 2014

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“…Notice that these Fermi arcs are different from the Fermi arcs found inside the pseudogap phase of underdoped cuprates 30 . In fact, the last mentioned arcs are typically not composed of Fermi liquid quasiparticles 31 in the strict sense imposed here and the arcs are separated by gaped excitations 32 . It is, however, not impossible that there is a connection between the non-Fermi liquid like excitations and the pseudogap.…”

Section: Discussionmentioning

confidence: 99%

Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La2−xSrxCuO4

et al. 2013

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High-temperature superconductivity emerges from an un-conventional metallic state. This has stimulated strong efforts to understand exactly how Fermi liquids breakdown and evolve into an un-conventional metal. A fundamental question is how Fermi liquid quasiparticle excitations break down in momentum space. Here we show, using angle-resolved photoemission spectroscopy, that the Fermi liquid quasiparticle excitations of the overdoped superconducting cuprate La 1.77 Sr 0.23 CuO 4 is highly anisotropic in momentum space. The quasiparticle scattering and residue behave differently along the Fermi surface and hence the Kadowaki-Wood's relation is not obeyed. This kind of Fermi liquid breakdown may apply to a wide range of strongly correlated metal systems where spin fluctuations are present.

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“…In this paper, we present experimental results on the optimally doped cuprate Bi 2 Sr 2 CaCu 2 O 8+δ (BSCCO 2212, T C ≈ 95 K), measured by spin-resolved photoemission while maintaining the full energy and momentum resolution of ARPES. Cuprate superconductors are representative systems for the study of electron correlations and have been probed extensively by ARPES [24][25][26][27][28][29]. Furthermore, it has already been shown in a previous work [30] that spin-resolved angle-integrated resonant photoemission can help improve the description of their electronic structure by determining, for instance, the Zhang-Rice singlet character of the relevant low-energy states in BSCCO.…”

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confidence: 99%

Spin polarization in photoemission from the cuprate superconductor Bi2Sr2CaCu2O8+δ

et al. 2017

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Photoelectrons produced from the excitation of spin-degenerate states in solids can have a sizable spin polarization, which is related to the phase of interfering channels in the photoemission matrix elements. Such spin polarization can be measured by spin-resolved photoemission spectroscopy to gain information about the transitions and the Wigner time delay of the process. Incorporating strongly correlated electron systems into this paradigm could yield a novel means of extracting phase information crucial to understanding the mechanism of their emergent behavior. In this work, we present, as a case study, experimental measurements of the cuprate superconductor Bi 2 Sr 2 CaCu 2 O 8+δ by spin-resolved photoemission while maintaining full angular and energy resolution. A spin polarization of at least 10% is observed, which is related to the phase of the photoelectron wave function. DOI: 10.1103/PhysRevB.95.245125 The electronic properties of crystals are best understood when information on their band structure can be obtained. Angle-resolved photoemission spectroscopy (ARPES) provides a direct means of reconstructing the band structure by measuring the energies and momenta of electrons photoexcited from a solid [1]. Spin-and angle-resolved photoemission spectroscopy (SARPES), in addition, measures the spin polarization P of the photoelectron beam as a function of emission angle and kinetic energy. This can show a net polarization if the initial state is polarized as, for example, in ferromagnets [2,3] or spin-momentum-locked systems, such as Rashba-like materials [4][5][6] and topological insulators [7][8][9][10], but also as a result of the photoemission process as a whole [11]. If the incident light is circularly polarized, i.e., it carries angular momentum, the spin polarization of the photoelectron beam from solid-state targets can, in several different circumstances, be interpreted as a result of the selection rules for the considered transitions along the lines of the atomic Fano effect [12][13][14][15][16].Also, when the incident light is linearly polarized or unpolarized, i.e., it does not transfer a net angular momentum, the photoelectron beam can still present a sizable P. The origin of this effect lies in the symmetry reduction of angledependent photoemission and in the interference of different photoemission channels. The size of P is related to the phase shift of the complex matrix elements describing the transitions under consideration [17][18][19]. One can, therefore, access the phase information by measuring the spin polarization of the photoelectrons. In particular, a novel application of SARPES is the estimate of the Eisenbud-Wigner-Smith (EWS) time delay [20] τ EWS of photoemission, defined as the derivative of the phase shift with respect to the photoelectron kinetic energy, obtained from the measured P, as shown in Ref. [19] for the model system Cu(111). By expressing the spin polarization as a function of the radial parts and phase shifts of the matrix elements, along the lines of the ato...

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The origin and non-quasiparticle nature of Fermi arcs in Bi2Sr2CaCu2O8+δ

Cited by 103 publications

References 32 publications

Charge Order Driven by Fermi-Arc Instability in Bi ₂ Sr _{2−
x} La _x CuO _6+δ

Charge Order Driven by Fermi-Arc Instability in Bi ₂ Sr _{2−
x} La _x CuO _6+δ

Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La2−xSrxCuO4

Spin polarization in photoemission from the cuprate superconductor Bi2Sr2CaCu2O8+δ

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The origin and non-quasiparticle nature of Fermi arcs in Bi2Sr2CaCu2O8+δ

Cited by 103 publications

References 32 publications

Charge Order Driven by Fermi-Arc Instability in Bi 2 Sr 2− x La x CuO 6+δ

Charge Order Driven by Fermi-Arc Instability in Bi 2 Sr 2− x La x CuO 6+δ

Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La2−xSrxCuO4

Spin polarization in photoemission from the cuprate superconductor Bi2Sr2CaCu2O8+δ

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Charge Order Driven by Fermi-Arc Instability in Bi ₂ Sr _{2−
x} La _x CuO _6+δ

Charge Order Driven by Fermi-Arc Instability in Bi ₂ Sr _{2−
x} La _x CuO _6+δ