Peak-dip-hump lineshape from holographic superconductivity

Chen, Jiunn-Wei; Kao, Ying-Jer; Wen, Wen-Yu

doi:10.1103/physrevd.82.026007

Cited by 40 publications

(45 citation statements)

References 30 publications

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“…The difference between k F without the condensate and the surface of minimum gap will be small in the examples we study, which have T c small compared to µ, and are therefore close to the RN geometry as we review below. [48] appeared as this paper was being completed. The crucial Majorana coupling is not included there.…”

Section: Jhep03(2010)121mentioning

confidence: 99%

Photoemission “experiments” on holographic superconductors

Faulkner¹,

Horowitz

McGreevy

et al. 2010

J. High Energ. Phys.

142

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Abstract:We study the effects of a superconducting condensate on holographic Fermi surfaces. With a suitable coupling between the fermion and the condensate, there are stable quasiparticles with a gap. We find some similarities with the phenomenology of the cuprates: in systems whose normal state is a non-Fermi liquid with no stable quasiparticles, a stable quasiparticle peak appears in the condensed phase.

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Section: Jhep03(2010)121mentioning

confidence: 99%

Photoemission “experiments” on holographic superconductors

Faulkner¹,

Horowitz

McGreevy

et al. 2010

J. High Energ. Phys.

142

View full text Add to dashboard Cite

show abstract

“…At low temperature, they can condense, spontaneously breaking the U (1) symmetry, changing the background [36][37][38]. The problem of the fermion response in various possible holographic superconducting phases has been studied [24,[76][77][78][79][80][81]. The superconducting condensate can open a gap in the fermion spectrum around the chemical potential [27] if a suitable bulk coupling between spinor and scalar is included.…”

Section: The Superconducting Statementioning

confidence: 99%

Holographic non-Fermi-liquid fixed points

Faulkner¹,

Iqbal

Liu

et al. 2011

Phil. Trans. R. Soc. A.

144

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Techniques arising from string theory can be used to study assemblies of strongly interacting fermions. Via this 'holographic duality', various strongly coupled many-body systems are solved using an auxiliary theory of gravity. Simple holographic realizations of finite density exhibit single-particle spectral functions with sharp Fermi surfaces, of a form distinct from those of the Landau theory. The self-energy is given by a correlation function in an infrared (IR) fixed-point theory that is represented by a two-dimensional anti de Sitter space (AdS 2 ) region in the dual gravitational description. Here, we describe in detail the gravity calculation of this IR correlation function.

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“…For the RN-AdS 4 background, fermion correlators in the dual boundary theory have been studied extensively; see, for example, [24,41,[46][47][48][49][50][51][52][53][54][55][56][57][58][59][60]. A similar kind of analysis can be done here for the electron star background.…”

Section: Discussionmentioning

confidence: 87%

Neutral order parameters in metallic criticality ind=2+1from a hairy electron star

Edalati

Phillips

2011

Phys. Rev. D

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We use holography to study the spontaneous condensation of a neutral order parameter in a (2+1)-dimensional field theory at zero-temperature and finite density, dual to the electron star background of Hartnoll and Tavanfar. An appealing feature of this field theory is the emergence of an IR Lifshitz fixed-point with a finite dynamical critical exponent z, which is due to the strong interaction between critical bosonic degrees of freedom and a finite density of fermions (metallic quantum criticality). We show that under some circumstances the electron star background develops a neutral scalar hair whose holographic interpretation is that the boundary field theory undergoes a quantum phase transition, with a Berezinski-Kosterlitz-Thouless character, to a phase with a neutral order parameter. Including the backreaction of the bulk neutral scalar on the background, we argue that the two phases across the quantum critical point have different z, a novelty that exists in certain quantum phase transitions in condensed matter systems. We also analyze the system at finite temperature and find that the phase transition becomes, as expected, second-order. Embedding the neutral scalar into a higher form, a variety of interesting phases could potentially be realized for the boundary field theory. Examples which are of particular interest to condensed matter physics include an antiferromagnetic phase where a vector condenses and break the spin symmetry, a quadrupole nematic phase which involves the condensation of a symmetric traceless tensor breaking rotational symmetry, or different phases of a system with competing order parameters.

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Peak-dip-hump lineshape from holographic superconductivity

Cited by 40 publications

References 30 publications

Photoemission “experiments” on holographic superconductors

Photoemission “experiments” on holographic superconductors

Holographic non-Fermi-liquid fixed points

Neutral order parameters in metallic criticality ind=2+1from a hairy electron star

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