QUASI-PARTICLE AND SPIN EXCITATION-SPECTRA IN THE NORMAL AND D-WAVE SUPERCONDUCTING STATE OF THE 2-DIMENSIONAL HUBBARD-MODEL

被引：144

作者：

DAHM, T

TEWORDT, L

机构：

[1] Abteilung für Theoretische Festkörperphysik, Universität Hamburg, D-20355 Hamburg

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.74.793

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The quasiparticle and spin excitation spectra in the 2D Hubbard model are calculated self-consistently as functions of momentum on the real frequency axis. Near half filling we obtain in the normal state a pseudogap in the density of states. The pairing state has dx2-y2 symmetry. Below Tc, gaps open rapidly in the frequency spectra of the gap function, the quasiparticle scattering rate, and the density of states. The scattering rate and spin-lattice relaxation rate drop abruptly below Tc. Our results are consistent with experiments on La2-xSrxCuO4. © 1995 The American Physical Society.

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页码：793 / 796

页数：4

相关论文

共 26 条

[1] CONSERVING APPROXIMATIONS FOR STRONGLY CORRELATED ELECTRON-SYSTEMS - BETHE-SALPETER-EQUATION AND DYNAMICS FOR THE TWO-DIMENSIONAL HUBBARD-MODEL [J].

BICKERS, NE ;

SCALAPINO, DJ ;

WHITE, SR .

PHYSICAL REVIEW LETTERS, 1989, 62 (08) :961-964

[2] MICROWAVE DETERMINATION OF THE QUASI-PARTICLE SCATTERING TIME IN YBA2CU3O6.95 [J].

BONN, DA ;

LIANG, RX ;

RISEMAN, TM ;

BAAR, DJ ;

MORGAN, DC ;

ZHANG, K ;

DOSANJH, P ;

DUTY, TL ;

MACFARLANE, A ;

MORRIS, GD ;

BREWER, JH ;

HARDY, WN ;

KALLIN, C ;

BERLINSKY, AJ .

PHYSICAL REVIEW B, 1993, 47 (17) :11314-11328

[3] SPIN MODE, ELECTRICAL-RESISTIVITY, AND THERMAL-CONDUCTIVITY FOR THE 2-DIMENSIONAL HUBBARD-MODEL [J].

DAHM, T ;

TEWORDT, L ;

WERMBTER, S .

PHYSICAL REVIEW B, 1994, 49 (01) :748-751

[4]

DAHM T, UNPUB

[5] LOW-FREQUENCY SPIN DYNAMICS IN UNDOPED AND SR-DOPED LA2CUO4 [J].

IMAI, T ;

SLICHTER, CP ;

YOSHIMURA, K ;

KOSUGE, K .

PHYSICAL REVIEW LETTERS, 1993, 70 (07) :1002-1005

[6] MEASUREMENT OF THE Q-DEPENDENT STATIC SPIN SUSCEPTIBILITY CHI'(Q) IN YBA2CU3O6.9 [J].

IMAI, T ;

SLICHTER, CP ;

PAULIKAS, AP ;

VEAL, B .

PHYSICAL REVIEW B, 1993, 47 (14) :9158-9161

[7] PSEUDOGAPS AND THE SPIN-BAG APPROACH TO HIGH-TC SUPERCONDUCTIVITY [J].

KAMPF, A ;

SCHRIEFFER, JR .

PHYSICAL REVIEW B, 1990, 41 (10) :6399-6408

[8] SPECTRAL-FUNCTION AND PHOTOEMISSION SPECTRA IN ANTIFERROMAGNETICALLY CORRELATED METALS [J].

KAMPF, AP ;

SCHRIEFFER, JR .

PHYSICAL REVIEW B, 1990, 42 (13) :7967-7974

[9] NMR AND NQR STUDIES OF SPIN CORRELATION AND SUPERCONDUCTIVITY IN HIGH-T(C) OXIDES [J].

KITAOKA, Y ;

ISHIDA, K ;

ZHENG, GQ ;

OHSUGI, S ;

ASAYAMA, K .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1993, 54 (10) :1385-1392

[10] SELF-CONSISTENT CALCULATIONS OF SUPERCONDUCTIVITY IN A NEARLY ANTIFERROMAGNETIC FERMI-LIQUID [J].

LENCK, S ;

CARBOTTE, JP ;

DYNES, RC .

PHYSICAL REVIEW B, 1994, 50 (14) :10149-10156