Many-body definition of a Fermi surface: Application to angle-resolved photoemission

Straub, Th.; Claessen, R.; Steiner, P.; Hüfner, S.; Eyert, V.; Friemelt, K.; Bücher, E.

doi:10.1103/physrevb.55.13473

Cited by 66 publications

(38 citation statements)

References 17 publications

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“…The phonon dispersion is computed with the help of density functional perturbation theory (DFPT) capabilities of ABINIT [45,46]. A DFT based calculation for the undistorted or normal state structure, using a free electron final [5] are very similar to the result for TaS 2 , and the FSM for TiTe 2 [32] resembles the one of TiSe 2 .…”

Section: Experiments and Calculationsmentioning

confidence: 99%

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Fermi surface of layered compounds and bulk charge density wave systems

Clerc

Battaglia

Cercellier

et al. 2007

J. Phys.: Condens. Matter

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A review is given of recent angle-resolved photoemission (ARPES) experiments and analyses on a series of layered charge density wave materials. Important aspects of ARPES are recalled in view of its capability for bulk band, Fermi surface and spectral function mapping despite its surface sensitivity. Discussed are TaS 2 , TaSe 2 , NbTe 2 , TiSe 2 and TiTe 2 with structures related to the so-called 1T polytype. Many of them undergo charge density wave transitions or exist with a distorted lattice structure. Attempts to explain the mechanism behind the structural reconstruction are given. Depending on the filling of the lowest occupied band a drastically different behaviour is observed. Whereas density functional calculations of the electronic energy and momentum distribution reproduce well the experimental spectral weight distribution at the Fermi energy, the ARPES energy distribution curves reveal that for some of the compounds the Fermi surface is pseudo-gapped. Two different explanations are given, the first based on density functional calculations accounting for the charge-density-wave-induced lattice distortion and the second relying on many-body physics and polaron formation. Qualitatively, both describe the observations well. However, in the future, in order to be selective, quantitative modelling will be necessary, including the photoemission matrix elements.

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Section: Experiments and Calculationsmentioning

confidence: 99%

“…The analysis of ADCs instead of EDCs has been applied successfully to the cuprate high T c superconductors [37]. These ARPES modes are well established now and have proven their power on many systems [31,32,36,38].…”

Section: Experiments and Calculationsmentioning

confidence: 99%

Fermi surface of layered compounds and bulk charge density wave systems

Clerc

Battaglia

Cercellier

et al. 2007

J. Phys.: Condens. Matter

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“…By definition the momentum vectors k F constituting the Fermi surface are identified through a step or at least the vertical slope of the momentum electron distribution n(k) at zero temperature [4,15]. Method (iii) employs a fit of photoemission peak positions over a wide range of emission angles and extrapolation to zero binding energy to obtain an estimate for k F .…”

mentioning

confidence: 99%

“…Angle-resolved photoemission spectroscopy (ARPES) has emerged as probably the most powerful tool for determining the occupied electronic band structure of solids and their surfaces. Recently, it has been extensively applied to gain insight into the topology of Fermi surfaces of a variety of materials ranging from conventional three-dimensional metals like W and Cu [1,2,3] to quasi two dimensional layered compounds [4,5,6], purple bronzes [7] and high T C cuprate materials [8,9]. The accuracy of the determination of the Fermi surface by ARPES, however, has never been questioned and it turns out that even for the extensively studied BiSrCaCuO it is not at all clear that the topology of the normal state FS shows hole-like pockets around the corners of the Brillouin zone [8,9,10] or electron-pockets around the center of the BZ [11].…”

mentioning

confidence: 99%

“…This motivates studies of band dispersions, line shapes, momentum distribution functions, and Fermi surfaces. Fermi vectors have been extracted from ARPES data employing criteria like (i) maximum ARPES intensity at the Fermi level E F [1,2,7,8,14], (ii) max|∇ k | of the energy integrated photoemission intensity [4,5,15,16] or (iii) fitting ARPES peak positions over several emission angles and extrapolating the dispersion to E F [17]. However, none of these techniques explicitly considers the detailed mechanism of the photoemission process.…”

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How to Determine Fermi Vectors by Angle-Resolved Photoemission

et al. 1999

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Angle resolved photoemission spectroscopy (ARPES) has been commonly applied to evaluate the shape of Fermi surfaces by employing simple criteria for the determination of the Fermi vector kF parallel to the surface such as maximum photoemission intensity at the Fermi level or discontinuity in the momentum distribution function. Here we show that these criteria may lead to large uncertainties in particular for narrow band systems. We develop a reliable method for the determination of Fermi vectors employing high resolution ARPES at different temperatures. The relevance and accuracy of the method is discussed on data of the quasi two dimensional system TiTe2.A wide variety of physical phenomena of crystalline materials, such as e. g. transport, optical and magnetic response, and phase transitions rely on details of the topology of the Fermi surface (FS). Its experimental determination performed by traditional techniques like de Haas-van Alphen effect, magnetoacoustic effect, Compton scattering, or positron annihilation have, however, been restricted to bulk materials. All techniques in common is the indirect information on the shape of the Fermi surface. While the first two determine extremal crosssections of FS's in a plane normal to the applied magnetic field, the latter yield information on one and two dimensional projections of FS's. More complex cases, such as superlattices, heterostructures or even clean surfaces can also hardly be accessed. Angle-resolved photoemission spectroscopy (ARPES) has emerged as probably the most powerful tool for determining the occupied electronic band structure of solids and their surfaces. Recently, it has been extensively applied to gain insight into the topology of Fermi surfaces of a variety of materials ranging from conventional three-dimensional metals like W and Cu [1,2,3] to quasi two dimensional layered compounds [4,5,6], purple bronzes [7] and high T C cuprate materials [8,9]. The accuracy of the determination of the Fermi surface by ARPES, however, has never been questioned and it turns out that even for the extensively studied BiSrCaCuO it is not at all clear that the topology of the normal state FS shows hole-like pockets around the corners of the Brillouin zone [8,9,10] or electron-pockets around the center of the BZ [11].It is widely assumed that ARPES measures the spectral function A(k, ω) of the one-particle system times the Fermi function f (ω) and matrix elements do not play a significant role (see e.g. ref. [12,13]). This motivates studies of band dispersions, line shapes, momentum distribution functions, and Fermi surfaces. Fermi vectors have been extracted from ARPES data employing criteria like (i) maximum ARPES intensity at the Fermi level E F [1,2,7,8,14], (ii) max|∇ k | of the energy integrated photoemission intensity [4,5,15,16] or (iii) fitting ARPES peak positions over several emission angles and extrapolating the dispersion to E F [17]. However, none of these techniques explicitly considers the detailed mechanism of the photoemission process. In part...

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Angle‐resolved photoelectron spectroscopy: From photoemission imaging to spatial resolution

Kipp¹,

Skibowski²

2003

Solid‐State Photoemission and Related Methods

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Many-body definition of a Fermi surface: Application to angle-resolved photoemission

Cited by 66 publications

References 17 publications

Fermi surface of layered compounds and bulk charge density wave systems

Fermi surface of layered compounds and bulk charge density wave systems

How to Determine Fermi Vectors by Angle-Resolved Photoemission

Angle‐resolved photoelectron spectroscopy: From photoemission imaging to spatial resolution

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