Publication

Fermi liquid and non-Fermi liquid spectral lineshapes in low-dimensional solids

Marco Grioni, Luca Perfetti
2002
Journal Articles

Abstract

We exploited angle-resolved photoemission (ARPES) to investigate the nature of the elementary quasiparticle (QP) excitations in selected low-dimensional compounds. In the model quasi two-dimensional conductor TiTe2, we observe spectral lineshapes which are consistent with a Fermi liquid (FL) scenario, and the usual QP scattering mechanisms. In contrast, in typical quasi one-dimensional Peierls systems like TTF-TCNQ, (TaSe4)(2)I and K0.3MoO3 we find clear non-FL lineshapes. We briefly discuss the possible origins of these unusual properties. (C) 2002 Elsevier Science B.V. All rights reserved.

Official source

https://infoscience.epfl.ch/entities/publication/ccafa439-3d9c-4787-be8c-fc8aef572684

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Marco Grioni, Luca Perfetti
2002
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/ccafa439-3d9c-4787-be8c-fc8aef572684

About this result

Related concepts (19)

Fermi liquid theory

Fermi liquid theory (also known as Landau's Fermi-liquid theory) is a theoretical model of interacting fermions that describes the normal state of most metals at sufficiently low temperatures. The interactions among the particles of the many-body system do not need to be small. The phenomenological theory of Fermi liquids was introduced by the Soviet physicist Lev Davidovich Landau in 1956, and later developed by Alexei Abrikosov and Isaak Khalatnikov using diagrammatic perturbation theory.

Quasiparticle

In physics, quasiparticles and collective excitations are closely related phenomena arising when a microscopically complicated system such as a solid behaves as if it contained different weakly interacting particles in vacuum. For example, as an electron travels through a semiconductor, its motion is disturbed in a complex way by its interactions with other electrons and with atomic nuclei. The electron behaves as though it has a different effective mass travelling unperturbed in vacuum.

Fermi gas

A Fermi gas is an idealized model, an ensemble of many non-interacting fermions. Fermions are particles that obey Fermi–Dirac statistics, like electrons, protons, and neutrons, and, in general, particles with half-integer spin. These statistics determine the energy distribution of fermions in a Fermi gas in thermal equilibrium, and is characterized by their number density, temperature, and the set of available energy states. The model is named after the Italian physicist Enrico Fermi.

Related publications (1)

Fermi liquid and non-Fermi liquid spectral lineshapes in low-dimensional solids

Chat with Graph Search

Band mapping and quasiparticle suppression in the one-dimensional organic conductor TTF-TCNQ