Fermi Surface Dichotomy of the Superconducting Gap and Pseudogap in Underdoped Pnictides

Overview

Journal Nat Commun

Specialty Biology

Date 2011 Jul 14

PMID 21750547

Citations 6

Authors

Y M Xu

P Richard

K Nakayama

T Kawahara

Y Sekiba

T Qian

M Neupane

S Souma

T Sato

T Takahashi

H Q Luo

H H Wen

G F Chen

N L Wang

Z Wang

Z Fang

X Dai

H Ding

Affiliations

Soon will be listed here.

Abstract

High-temperature superconductivity in iron-arsenic materials (pnictides) near an antiferromagnetic phase raises the possibility of spin-fluctuation-mediated pairing. However, the interplay between antiferromagnetic fluctuations and superconductivity remains unclear in the underdoped regime, which is closer to the antiferromagnetic phase. Here we report that the superconducting gap of underdoped pnictides scales linearly with the transition temperature, and that a distinct pseudogap coexisting with the superconducting gap develops on underdoping. This pseudogap occurs on Fermi surface sheets connected by the antiferromagnetic wavevector, where the superconducting pairing is stronger as well, suggesting that antiferromagnetic fluctuations drive both the pseudogap and superconductivity. Interestingly, we found that the pseudogap and the spectral lineshape vary with the Fermi surface quasi-nesting conditions in a fashion that shares similarities with the nodal-antinodal dichotomous behaviour observed in underdoped copper oxide superconductors.

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References

Ma J, Pan Z, Niestemski F, Neupane M, Xu Y, Richard P . Coexistence of competing orders with two energy gaps in real and momentum space in the high temperature superconductor Bi_{2}Sr_{2-x}La_{x}CuO_{6+delta}. Phys Rev Lett. 2008; 101(20):207002. DOI: 10.1103/PhysRevLett.101.207002. View

de la Cruz C, Huang Q, Lynn J, Li J, Ratcliff 2nd W, Zarestky J . Magnetic order close to superconductivity in the iron-based layered LaO1-xFxFeAs systems. Nature. 2008; 453(7197):899-902. DOI: 10.1038/nature07057. View

Seo K, Bernevig B, Hu J . Pairing symmetry in a two-orbital exchange coupling model of oxypnictides. Phys Rev Lett. 2008; 101(20):206404. DOI: 10.1103/PhysRevLett.101.206404. View

Urbano R, Green E, Moulton W, Reyes A, Kuhns P, Bittar E . Distinct high-T transitions in underdoped Ba(1-x)KxFe2As2. Phys Rev Lett. 2010; 105(10):107001. DOI: 10.1103/PhysRevLett.105.107001. View

Richard P, Sato T, Nakayama K, Souma S, Takahashi T, Xu Y . Angle-resolved photoemission spectroscopy of the Fe-Based Ba0.6K0.4Fe2As2 high temperature superconductor: evidence for an orbital selective electron-mode coupling. Phys Rev Lett. 2009; 102(4):047003. DOI: 10.1103/PhysRevLett.102.047003. View

Chen G, Li Z, Wu D, Li G, Hu W, Dong J . Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO1-xFxFeAs. Phys Rev Lett. 2008; 100(24):247002. DOI: 10.1103/PhysRevLett.100.247002. View

Shen , DESSAU , Wells , King , Spicer , Arko . Anomalously large gap anisotropy in the a-b plane of Bi2Sr2CaCu2O8+ delta. Phys Rev Lett. 1993; 70(10):1553-1556. DOI: 10.1103/PhysRevLett.70.1553. View

Ding H, Nakayama K, Richard P, Souma S, Sato T, Takahashi T . Electronic structure of optimally doped pnictide Ba0.6K0.4Fe2As2: a comprehensive angle-resolved photoemission spectroscopy investigation. J Phys Condens Matter. 2011; 23(13):135701. DOI: 10.1088/0953-8984/23/13/135701. View

Kondo T, Santander-Syro A, Copie O, Liu C, Tillman M, Mun E . Momentum dependence of the superconducting gap in NdFeAsO0.9F0.1 single crystals measured by angle resolved photoemission spectroscopy. Phys Rev Lett. 2008; 101(14):147003. DOI: 10.1103/PhysRevLett.101.147003. View

10.

Kuroki K, Onari S, Arita R, Usui H, Tanaka Y, Kontani H . Unconventional pairing originating from the disconnected Fermi surfaces of superconducting LaFeAsO1-xFx. Phys Rev Lett. 2008; 101(8):087004. DOI: 10.1103/PhysRevLett.101.087004. View

11.

Kamihara Y, Watanabe T, Hirano M, Hosono H . Iron-based layered superconductor La[O(1-x)F(x)]FeAs (x = 0.05-0.12) with T(c) = 26 K. J Am Chem Soc. 2008; 130(11):3296-7. DOI: 10.1021/ja800073m. View

12.

Chen X, Wu T, Wu G, Liu R, Chen H, Fang D . Superconductivity at 43 K in SmFeAsO1-xFx. Nature. 2008; 453(7196):761-2. DOI: 10.1038/nature07045. View

13.

Ding , NORMAN , Campuzano , Randeria , Bellman , Yokoya . Angle-resolved photoemission spectroscopy study of the superconducting gap anisotropy in Bi2Sr2CaCu2O8+x. Phys Rev B Condens Matter. 1996; 54(14):R9678-R9681. DOI: 10.1103/physrevb.54.r9678. View

14.

Loeser , Shen , DESSAU , Marshall , Park , Fournier . Excitation Gap in the Normal State of Underdoped Bi2Sr2CaCu2O8+delta. Science. 1996; 273(5273):325-9. DOI: 10.1126/science.273.5273.325. View

15.

Rotter M, Pangerl M, Tegel M, Johrendt D . Superconductivity and crystal structures of (Ba(1-x)Kx)Fe2As2 (x=0-1). Angew Chem Int Ed Engl. 2008; 47(41):7949-52. DOI: 10.1002/anie.200803641. View

16.

Ning F, Ahilan K, Imai T, Sefat A, McGuire M, Sales B . Contrasting spin dynamics between underdoped and overdoped Ba(Fe1-xCox)2As2. Phys Rev Lett. 2010; 104(3):037001. DOI: 10.1103/PhysRevLett.104.037001. View

17.

Wang F, Zhai H, Ran Y, Vishwanath A, Lee D . Functional renormalization-group study of the pairing symmetry and pairing mechanism of the FeAs-based high-temperature superconductor. Phys Rev Lett. 2009; 102(4):047005. DOI: 10.1103/PhysRevLett.102.047005. View

18.

Zhou X, Yoshida T, Lee D, Yang W, Brouet V, Zhou F . Dichotomy between nodal and antinodal quasiparticles in underdoped (La2-xSrx)CuO4 superconductors. Phys Rev Lett. 2004; 92(18):187001. DOI: 10.1103/PhysRevLett.92.187001. View

19.

Mazin I, Singh D, Johannes M, Du M . Unconventional superconductivity with a sign reversal in the order parameter of LaFeAsO1-xFx. Phys Rev Lett. 2008; 101(5):057003. DOI: 10.1103/PhysRevLett.101.057003. View