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Titolo:
Dynamical properties of the 1/r(2)-type supersymmetric t-J model in a magnetic field: Manifestation of spin-charge separation
Autore:
Saiga, Y; Kuramoto, Y;
Indirizzi:
Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan Univ Tokyo Kashiwa Chiba Japan 2778581 hys, Kashiwa, Chiba 2778581, Japan Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan Tohoku Univ Sendai Miyagi Japan 9808578 ys, Sendai, Miyagi 9808578, Japan
Titolo Testata:
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
fascicolo: 12, volume: 69, anno: 2000,
pagine: 3917 - 3931
SICI:
0031-9015(200012)69:12<3917:DPOT1S>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
LONG-RANGE EXCHANGE; ANGLE-RESOLVED PHOTOEMISSION; ONE-DIMENSIONAL SRCUO2; ELEMENTARY EXCITATIONS; HUBBARD-MODEL; FERMI GAS; CHAIN; SR2CUO3; SYSTEMS; TEMPERATURE;
Keywords:
dynamical spin structure factor; dynamical charge structure factor; supersymmetric t-J model; inverse-square interaction; magnetic field; spin-charge separation; exact diagonalization; recursion method;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Saiga, Y Univ Tokyo, Inst Solid State Phys, Kashiwa No Ha 5-1-5, Kashiwa, Chiba 2778581, Japan Univ Tokyo Kashiwa No Ha 5-1-5 Kashiwa Chiba Japan 2778581 Japan
Citazione:
Y. Saiga e Y. Kuramoto, "Dynamical properties of the 1/r(2)-type supersymmetric t-J model in a magnetic field: Manifestation of spin-charge separation", J PHYS JPN, 69(12), 2000, pp. 3917-3931

Abstract

Quasi-particle picture in a magnetic field is pursued for dynamical spin and charge correlation functions of the one-dimensional supersymmetric t- J model with inverse-square interaction. With use of exact diagonalization and the asymptotic Bethe-ansatz equations for finite systems, excitation contents of relevant excited states are identified which are valid in the thermodynamic limit. The excitation contents are composed of spinons, antispinons, holons and antiholons obeying fractional statistics. Both longitudinal and transverse components of the dynamical spin structure factor are independent of the electron density in the region where only quasiparticles with spin degrees of freedom (spinons and antispinons) contribute. The dynamical charge structure factor does not depend on the spin-polarization density inthe region where only quasi-particles with charge (holons and antiholons) are excited. These features indicate the strong spin-charge separation in dynamics, reflecting the high symmetry of the model.

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Documento generato il 29/03/20 alle ore 08:59:47