Observation of a marginal Fermi glass

Mahmood, Fahad; Chaudhuri, Dipanjan; Gopalakrishnan, Sarang; Nandkishore, Rahul; Armitage, N. P.

doi:10.1038/s41567-020-01149-0

Cited by 52 publications

(34 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nonlinear response effects -nonlinear saturation of sound absorption as a function of sound intensity, echoes, and spectral diffusion [19] -are broadly similar in Fermi glass and TLS glass, but it is important to investigate the differences, which can be measured experimentally (for recent advances, see [23]). Long structural relaxation times is one of the most important properties of the glass transition, and long energy relaxation times [16] is a key feature of low-temperature SNSs.…”

Section: Open Questions and Decisive Experimentsmentioning

confidence: 99%

A fermion phenomenology of low-temperature strongly-noncrystalline solids

Turlakov

2021

Preprint

View full text Add to dashboard Cite

Insisting on the relevance of spin-statistics theorem, I propose that anomalous low-energy excitations of strongly-noncrystalline solids (SNSs), observed at low temperatures T < 1K, are fermions, which are localized and weakly interacting. This phenomenological theory rationalizes all low-energy quantum many-body states of SNSs as Goldstone bosons-phonons and half-integer-spin fermions. Fermi glass, rather than isolated two-level systems (TLSs), appears to be a consistent theory of various thermal and nonlinear response properties of SNSs. A robust consequence of this theory is nearly constant-in-energy density of fermion states near Fermi energy, which in turn implies linear-in-temperature specific heat and frequencyindependent sound internal friction. Consistent parameters of Landau-Fermi glass are calculated on theoretical grounds as well as from experimental data.

show abstract

Section: Open Questions and Decisive Experimentsmentioning

confidence: 99%

A fermion phenomenology of low-temperature strongly-noncrystalline solids

Turlakov

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…In this paper we go beyond previous works of pump-probe spectroscopy on cuprates, applying the quench-drive spectroscopy setup [15][16][17][18] (see Fig. 1) recently extended to study different fea-tures of superconductors 19 , to superconductors with anisotropic d-wave order parameter.…”

Section: Introductionmentioning

confidence: 99%

Quench–drive spectroscopy of cuprates

Puviani

Manske

2022

Faraday Discuss.

View full text Add to dashboard Cite

show abstract

“…Coherent multidimensional, especially 2D, spectroscopy has been widely used to study electronic excitation (exciton) and vibration dynamics in molecular and semiconductor systems [22][23][24][25][26][27][28][29][30]. More recently, intersubband electronic excitations in quantum wells [31], carrier dynamics in graphene [32], spin-wave [33] and fractional excitations [34,35] in magnetic materials, marginal Fermi glass [36], and high-temperature superconductors [37] have been studied. In coherent 2D spectroscopy, a sequence of three laser pulses is used to excite the system, and the subsequent coherent light emission induced by the polarization of the system is measured.…”

Section: Introductionmentioning

confidence: 99%

Direct and ultrafast probing of quantum many-body interactions through coherent two-dimensional spectroscopy: From weak- to strong-interaction regimes

Phuc

Trung

2021

Phys. Rev. B

View full text Add to dashboard Cite

Interactions between particles in quantum many-body systems play a crucial role in determining the electric, magnetic, optical, and thermal properties of the system. The recent progress in the laser-pulse technique has enabled the manipulations and measurements of physical properties on ultrafast timescales. Here we propose a method for the direct and ultrafast probing of quantum many-body interaction through coherent two-dimensional (2D) spectroscopy. Using a two-band fermionic Hubbard model for the minimum two-site lattice system, we find that the 2D spectrum of a noninteracting system contains only diagonal peaks; the interparticle interaction manifests itself in the emergence of off-diagonal peaks in the 2D spectrum before all the peaks coalesce into a single diagonal peak as the system approaches the strongly interacting limit. The evolution of the 2D spectrum as a function of the time delay between the second and third laser pulses can provide important information on the ultrafast time variation of the interaction.

show abstract

Observation of a marginal Fermi glass

Cited by 52 publications

References 39 publications

A fermion phenomenology of low-temperature strongly-noncrystalline solids

A fermion phenomenology of low-temperature strongly-noncrystalline solids

Quench–drive spectroscopy of cuprates

Direct and ultrafast probing of quantum many-body interactions through coherent two-dimensional spectroscopy: From weak- to strong-interaction regimes

Contact Info

Product

Resources

About