منابع مشابه
The Metal–insulator Transition in One Dimension
The low–energy excited states of a system of interacting one–dimensional fermions in a conducting state are collective charge and spin density oscillations. The unusual physical properties of such a system (called “Luttinger liquid”) are characterized by the velocities uρ and uσ of the charge and spin excitations, as well as by a parameter Kρ that determines the power law behavior of correlatio...
متن کاملA solvable model for excitonic complexes in one dimension
It is known experimentally that stable few-body clusters containing negatively-charged electrons (e) and positively-charged holes (h) can exist in low-dimensional semiconductor nanostructures. In addition to the familiar exciton (e+h), three-body ‘charged excitons’ (2e+h and 2h+e) have also been observed. Much less is known about the properties of such charged excitons since three-body problems...
متن کاملGhost excitonic insulator transition in layered graphite.
Some unusual properties of layered graphite, including a linear energy dependence of the quasiparticle damping and weak ferromagnetism at low doping, are explained as a result of the proximity of a single graphene sheet to the excitonic insulator phase which can be further stabilized in a doped system of many layers stacked in the staggered ( ABAB...) configuration.
متن کاملSuperfluid-insulator transition of disordered bosons in one dimension
Ehud Altman,1 Yariv Kafri,2 Anatoli Polkovnikov,3 and Gil Refael4 1Department of Condensed Matter Physics, The Weizmann Institute of Science, Rehovot 76100, Israel 2Department of Physics, Technion, Haifa 32000, Israel 3Department of Physics, Boston University, Boston, Massachusetts 02215, USA 4Department of Physics, California Institute of Technology, MC 114-36, Pasadena, California 91125, USA ...
متن کاملEvidence for an excitonic insulator phase in 1T-TiSe2.
We present a new high-resolution angle-resolved photoemission study of 1T-TiSe2 in both its room-temperature, normal phase and its low-temperature, charge-density wave phase. At low temperature the photoemission spectra are strongly modified, with large band renormalizations at high-symmetry points of the Brillouin zone and a very large transfer of spectral weight to backfolded bands. A calcula...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1970
ISSN: 0033-068X
DOI: 10.1143/ptp.43.917