Fermi surface and extended vanHove singularity in the noncuprate superconductor Sr2RuO4

被引：101

作者：

Lu, DH ^{[1
]}

Schmidt, M ^{[1
]}

Cummins, TR ^{[1
]}

Schuppler, S ^{[1
]}

Lichtenberg, F ^{[1
]}

Bednorz, JG ^{[1
]}

机构：

[1] IBM CORP,DIV RES,ZURICH RES LAB,CH-8803 RUSCHLIKON,SWITZERLAND

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.76.4845

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We mapped the Fermi surface of the first copper-free layered perovskite superconductor, Sr2RuO4, by high-resolution (approximate to 22 meV) angle-resolved photoemission. Three bands cross the Fermi energy, consistent with band structure calculations; one around <(Gamma)over bar> and two around (X) over bar. The highlight is the observation of an extended van Hove singularity located 17 meV below the fermi level. It extends around (M) over bar for approximate to 0.2 Angstrom(-1) along <(Gamma)over bar>-(M) over bar-<(Gamma$)over bar> and (X) over bar-(M) over bar-(X) over bar in the projected Brillouin zone. This raises important questions related to the possible role of a van Hove singularity for oxide superconductivity.

引用

页码：4845 / 4848

页数：4

共 32 条

[21] ELECTRONIC BAND-STRUCTURE OF THE SUPERCONDUCTOR SR2RUO4 [J].

OGUCHI, T .

PHYSICAL REVIEW B, 1995, 51 (02) :1385-1388

[22] EVIDENCE FOR THE VANHOVE SCENARIO IN HIGH-TEMPERATURE SUPERCONDUCTIVITY FROM QUASI-PARTICLE-LIFETIME BROADENING [J].

PATTNAIK, PC ;

KANE, CL ;

NEWNS, DM ;

TSUEI, CC .

PHYSICAL REVIEW B, 1992, 45 (10) :5714-5717

[23]

SCHMIDT M, IN PRESS PHYS REV B

[24] PHOTOEMISSION-STUDIES OF HIGH-T-C SUPERCONDUCTORS - THE SUPERCONDUCTING GAP [J].

SHEN, ZX ;

SPICER, WE ;

KING, DM ;

DESSAU, DS ;

WELLS, BO .

SCIENCE, 1995, 267 (5196) :343-350

[25] RELATIONSHIP OF SR2RUO4 TO THE SUPERCONDUCTING LAYERED CUPRATES [J].

SINGH, DJ .

PHYSICAL REVIEW B, 1995, 52 (02) :1358-1361

[26] QUADRATIC TEMPERATURE-DEPENDENCE OF THE INPLANE RESISTIVITY IN SUPERCONDUCTING ND1.85CUO4 - EVIDENCE FOR FERMI-LIQUID NORMAL STATE [J].

TSUEI, CC ;

GUPTA, A ;

KOREN, G .

PHYSICA C, 1989, 161 (03) :415-422

[27] THERMODYNAMIC EVIDENCE FOR A DENSITY-OF-STATES PEAK NEAR THE FERMI LEVEL IN YBA2CU3O7-Y [J].

TSUEI, CC ;

CHI, CC ;

NEWNS, DM ;

PATTNAIK, PC ;

DAUMLING, M .

PHYSICAL REVIEW LETTERS, 1992, 69 (14) :2134-2137

[28] ANOMALOUS ISOTOPE EFFECT AND VANHOVE SINGULARITY IN SUPERCONDUCTING CU OXIDES [J].

TSUEI, CC ;

NEWNS, DM ;

CHI, CC ;

PATTNAIK, PC .

PHYSICAL REVIEW LETTERS, 1990, 65 (21) :2724-2727

[29] THE OCCURRENCE OF SINGULARITIES IN THE ELASTIC FREQUENCY DISTRIBUTION OF A CRYSTAL [J].

VANHOVE, L .

PHYSICAL REVIEW, 1953, 89 (06) :1189-1193

[30] REFINEMENT OF THE STRUCTURE OF SR2RUO4 WITH 100 AND 295 K X-RAY DATA [J].

WALZ, L ;

LICHTENBERG, F .

ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 1993, 49 :1268-1270

← 1 2 3 4 →