BOGOLIUBOV QUASI-PARTICLE EXCITATIONS IN THE 2-DIMENSIONAL T-J MODEL

被引：68

作者：

OHTA, Y

SHIMOZATO, T

EDER, R

MAEKAWA, S

机构：

[1] Department of Applied Physics, Nagoya University

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.73.324

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a proposed numerical technique for calculating anomalous Green's functions characteristic of superconductivity, we show that the low-lying excitations in a wide parameter and doping region of the two-dimensional t-J model are well described by the picture of dressed Bogoliubov quasiparticles in the BCS pairing theory. The pairing occurs predominantly in the dx2-y2-wave channel and the energy gap has a size DELTAd congruent-to 15J-0.27J between quarter and half fillings. Opening of the superconducting gap in the photoemission and inverse-photoemission spectra is demonstrated.

引用

页码：324 / 327

页数：4

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