Angle-resolved photoemission as a probe of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">α</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math><i>F</i>in high-temperature superconductors: A study of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Bi</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml

Arnold, G.; Mueller, F. M.; Swihart, James C.

doi:10.1103/physrevlett.67.2569

Cited by 47 publications

(9 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such spectra were quickly recognized to resemble the strong-coupling Pb tunneling spectra in which similar structures were related to the Pb phonon density of states [2,3]. The strong-coupling theory described above was used to obtain the Eliashberg Function, 2 ( ) F a w , representing the phonon density of states coupled to the electronic spectra, directly from the ARPES data [24]. The results were not conclusive, although recent attempts have proved more fruitful [25].…”

Section: Early Results On the Mode-coupling In The Cupratesmentioning

confidence: 99%

A review of electron–phonon coupling seen in the high‐T_c superconductors by angle‐resolved photoemission studies (ARPES)

Cuk¹,

Lü

Zhou

et al. 2004

Physica Status Solidi (b)

162

106

View full text Add to dashboard Cite

show abstract

Section: Early Results On the Mode-coupling In The Cupratesmentioning

confidence: 99%

A review of electron–phonon coupling seen in the high‐T_c superconductors by angle‐resolved photoemission studies (ARPES)

Cuk¹,

Lü

Zhou

et al. 2004

Physica Status Solidi (b)

162

106

View full text Add to dashboard Cite

show abstract

“…Our results indicate that the dip is much more significant in that it is revealing information about the underlying pairing interaction. The interpretation of the dip in ARPES spectra [4,5] has been an ongoing debate [7,8,12,13], but recently a case has been made that this feature arises from the coupling of quasiparticles to collective excitations of some type centered near the ͑p, p͒ point of the Brillouin zone [7,8,12] Given the inherent complexity of HTS cuprates, their surfaces, and the tunneling process in general, 0031-9007͞98͞80(1)͞153(4)$15.00 experimental reproducibility becomes the key in determining the magnitude of the energy gap and in focusing on particular spectral features. We note, for example, that phonon structures have been reported in the tunneling conductance of some Bi2212 junctions [14], but these are much less common than the dip discussed here.…”

mentioning

confidence: 99%

Unusual Strong-Coupling Effects in the Tunneling Spectroscopy of Optimally Doped and OverdopedBi2Sr2CaCu2

et al. 1998

View full text Add to dashboard Cite

Tunneling spectroscopy measurements are reported on single crystals of Bi 2 Sr 2 CaCu 2 O 81d using vacuum tunneling and point-contact methods. A reproducible dip feature in the tunneling conductance is found near jeV j 2D, observed for both voltage polarities in the best resolved spectra. With overdoping the position of the dip continues to scale with D, and its magnitude decreases as D decreases. These results indicate that the dip feature arises from a strong-coupling effect whereby the quasiparticle lifetime is decreased at a characteristic energy of ϳ2D, consistent with an electron-electron pairing interaction. [S0031-9007(97)04908-9] PACS numbers: 74.50. + r, 74.62.Dh, 74.72.Hs A provocative feature that has commonly been observed in the superconductor-insulator-normal (SIN) metal tunneling conductances of Bi 2 Sr 2 CaCu 2 O 81d (Bi2212) is a dip at jeV j ϳ 2D that is very large for voltage polarities which correspond to the removal of quasiparticles from the superconductor [1][2][3]. This feature has generated much interest due to its similarity to a dip found in the angle-resolved photoemission (ARPES) [4,5] spectra of Bi2212 and to strong-coupling effects in general [6]. But in contrast to the tunneling phonon structures observed in strong-coupled, low-T c superconductors [6], the dip is often highly asymmetric with bias voltage. For voltages corresponding to electron injection, the dip has appeared as a shoulder in early point-contact tunneling (PCT) measurements [1] and is scarcely observable in some scanning tunneling microscope (STM) measurements [2]. We report here that the dip feature is indeed observed for both bias voltage polarities in the best resolved SIN spectra obtained from both STM and PCT methods. This points toward a strong-coupling interpretation. As T c and D are reduced by overdoping (the latter from 37 to 15 meV in this study), the dip location continues to scale with D and its magnitude is reduced. The coupling to D is quite unusual and suggests that the dip arises from a pairing interaction that is purely electronic so that the superconducting gap feeds back into the excitations which mediate the pairing. This is also consistent with recent interpretations of the dip in ARPES spectra as arising from the coupling of quasiparticles to collective excitations [7,8].SIN tunneling spectroscopy is a unique probe of high temperature superconductors (HTS) in that it can, in principle, reveal the quasiparticle excitation spectrum directly with an energy resolution better than 1 meV. In conventional, s-wave superconductors, strong-coupling effects due to quasiparticle emission of bosons of frequency v produce a dip feature [6] in the tunneling conductance, dI͞dV , near a voltage, eV D 1 "v. More precisely, it is the maximum negative slope if dI͞dV vs V that pinpoints the boson frequency. In d-wave superconductors, which have gap nodes, quasiparticle decay processes which turn on at some threshold energy (e.g., 2D) display a dip in the density of states (DOS) near that energy [9], unshifted...

show abstract

“…2 Researchers 3 have reported some success with this procedure for the high-temperature superconductors; nonetheless the applicability of such a procedure is unknown outside a weakcoupling electron-phonon framework, and the process is complicated in the superconducting state due to the nonisotropic nature of the order parameter. Other procedures have been suggested, such as the inversion of the normal-state optical conductivity, 4 the conductivity in the superconducting state in conjunction with neutron-scattering data, 5 and the inversion of photoemission data 6 in the superconducting state. The recent very high-resolution photoemission measurements on a variety of cuprate materials have suggested that a sizable electron-phonon coupling exists, 7 and the possibility of inverting this data ͑in the normal state͒ has been reopened.…”

mentioning

confidence: 99%

“…The partial answer to this question is that there are other ͑i.e., nonpairing͒ scattering processes that affect the imaginary part of the self-energy and not the real part ͑e.g., impurities -see below͒. Even more critically, as was attempted in the original angle-resolved photoemission spectroscopy ͑ARPES͒ inversion work, 6 one might try to invert the entire spectral function. The difficulty is exemplified in Fig.…”

mentioning

confidence: 99%

Inversion of angle-resolved photoemission measurements in high-Tccuprates

Verga¹,

Knigavko²,

Marsiglio³

2003

Phys. Rev. B

View full text Add to dashboard Cite

show abstract

Angle-resolved photoemission as a probe ofα2Fin high-temperature superconductors: A study ofBi2

Cited by 47 publications

References 18 publications

A review of electron–phonon coupling seen in the high‐T_c superconductors by angle‐resolved photoemission studies (ARPES)

A review of electron–phonon coupling seen in the high‐T_c superconductors by angle‐resolved photoemission studies (ARPES)

Unusual Strong-Coupling Effects in the Tunneling Spectroscopy of Optimally Doped and OverdopedBi2Sr2CaCu2

Inversion of angle-resolved photoemission measurements in high-Tccuprates

Contact Info

Product

Resources

About

Angle-resolved photoemission as a probe ofα2Fin high-temperature superconductors: A study ofBi2

Cited by 47 publications

References 18 publications

A review of electron–phonon coupling seen in the high‐Tc superconductors by angle‐resolved photoemission studies (ARPES)

A review of electron–phonon coupling seen in the high‐Tc superconductors by angle‐resolved photoemission studies (ARPES)

Unusual Strong-Coupling Effects in the Tunneling Spectroscopy of Optimally Doped and OverdopedBi2Sr2CaCu2

Inversion of angle-resolved photoemission measurements in high-Tccuprates

Contact Info

Product

Resources

About

A review of electron–phonon coupling seen in the high‐T_c superconductors by angle‐resolved photoemission studies (ARPES)

A review of electron–phonon coupling seen in the high‐T_c superconductors by angle‐resolved photoemission studies (ARPES)