Coherent Quasiparticles with a Small Fermi Surface in Lightly Doped Sr3Ir2O7

被引：40

作者：

de la Torre, A. ^{[1
]}

Hunter, E. C. ^{[2
]}

Subedi, A. ^{[3
]}

Walker, S. McKeown ^{[1
]}

Tamai, A. ^{[1
]}

Kim, T. K. ^{[4
]}

Hoesch, M. ^{[4
]}

Perry, R. S. ^{[5
,6
]}

Georges, A. ^{[1
,3
,7
]}

Baumberger, F. ^{[1
,8
,9
]}

机构：

[1] Univ Geneva, Dept Quantum Matter Phys, CH-1211 Geneva 4, Switzerland

[2] Univ Edinburgh, Sch Phys & Astron, Edinburgh EH9 2TT, Midlothian, Scotland

[3] Ecole Polytech, Ctr Phys Theor, CNRS, F-91128 Palaiseau, France

[4] Diamond Light Source, Didcot OX11 0DE, Oxon, England

[5] UCL, London Ctr Nanotechnol, London WC1E 6BT, England

[6] UCL, UCL Ctr Mat Discovery, London WC1E 6BT, England

[7] Coll France, F-75005 Paris, France

[8] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland

[9] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 25期

基金：

欧洲研究理事会; 瑞士国家科学基金会; 英国工程与自然科学研究理事会;

关键词：

SUPERCONDUCTORS; PHASE;

D O I：

10.1103/PhysRevLett.113.256402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We characterize the electron doping evolution of (Sr1-xLax)(3)Ir2O7 by means of angle-resolved photoemission. Concomitant with the metal insulator transition around x approximate to 0.05 we find the emergence of coherent quasiparticle states forming a closed small Fermi surface of volume 3x/2, where x is the independently measured La concentration. The quasiparticle weight Z remains large along the entire Fermi surface, consistent with the moderate renormalization of the low-energy dispersion, and no pseudogap is observed. This indicates a conventional, weakly correlated Fermi liquid state with a momentum independent residue Z approximate to 0.5 in lightly doped Sr3Ir2O7.

引用

页数：5

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