Dynamics of correlation-frozen antinodal quasiparticles in superconducting cuprates

被引：28

作者：

Cilento, Federico ^{[1
]}

Manzoni, Giulia ^{[1
,2
]}

Sterzi, Andrea ^{[1
,2
]}

Peli, Simone ^{[3
]}

Ronchi, Andrea ^{[3
,4
]}

Crepaldi, Alberto ^{[5
]}

Boschini, Fabio ^{[6
,7
]}

Cacho, Cephise ^{[8
]}

Chapman, Richard ^{[8
]}

Springate, Emma ^{[8
]}

Eisaki, Hiroshi ^{[9
]}

Greven, Martin ^{[10
]}

Berciu, Mona ^{[6
,7
]}

Kemper, Alexander F. ^{[11
]}

Damascelli, Andrea ^{[6
,7
]}

Capone, Massimo ^{[12
,13
]}

Giannetti, Claudio ^{[3
]}

Parmigiani, Fulvio ^{[1
,2
,14
]}

机构：

[1] Elettra Sincrotrone Trieste SCpA, I-34149 Basovizza, Italy

[2] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy

[3] Univ Cattolica Sacro Cuore, Interdisciplinary Labs Adv Mat Phys, I-25121 Brescia, Italy

[4] Katholieke Univ Leuven, Dept Phys & Astron, Celestijnenlaan 200D, B-3001 Leuven, Belgium

[5] Ecole Polytech Fed Lausanne, Inst Phys, CH-1015 Lausanne, Switzerland

[6] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[7] Univ British Columbia, Quantum Matter Inst, Vancouver, BC V6T 1Z4, Canada

[8] Rutherford Appleton Lab, CLF Artemis, Harwell Sci & Innovat Campus, Didcot OX11 0QX, Oxon, England

[9] Natl Inst Adv Ind Sci & Technol, Nanoelect Res Inst, Tsukuba, Ibaraki 3058568, Japan

[10] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

[11] North Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA

[12] SISSA, Via Bonomea 265, I-34136 Trieste, Italy

[13] CNR IOM Democritos Natl Simulat Ctr, Via Bonomea 265, I-34136 Trieste, Italy

[14] Univ Cologne, Int Fac, Albertus Magnus Pl, D-50923 Cologne, Germany

来源：

SCIENCE ADVANCES | 2018年 / 4卷 / 02期

基金：

瑞士国家科学基金会; 加拿大自然科学与工程研究理事会; 美国能源部; 欧盟地平线“2020”; 加拿大创新基金会;

关键词：

HIGH-TEMPERATURE SUPERCONDUCTIVITY; ANGLE-RESOLVED PHOTOEMISSION; HIGH-T-C; SYMMETRY-BREAKING; PSEUDOGAP; SPECTROSCOPY; INHOMOGENEITY; HOLE;

D O I：

10.1126/sciadv.aar1998

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Many puzzling properties of high-critical temperature (T-c) superconducting (HTSC) copper oxides have deep roots in the nature of the antinodal quasiparticles, the elementary excitations with wave vector parallel to the Cu-O bonds. These electronic states are most affected by the onset of antiferromagnetic correlations and charge instabilities, and they host the maximum of the anisotropic superconducting gap and pseudogap. We use time-resolved extreme-ultraviolet photoemission with proper photon energy (18 eV) and time resolution (50 fs) to disclose the ultrafast dynamics of the antinodal states in a prototypical HTSC cuprate. After photoinducing a nonthermal charge redistribution within the Cu and O orbitals, we reveal a dramatic momentum-space differentiation of the transient electron dynamics. Whereas the nodal quasiparticle distribution is heated up as in a conventional metal, new quasiparticle states transiently emerge at the antinodes, similarly to what is expected for a photoexcited Mott insulator, where the frozen charges can be released by an impulsive excitation. This transient antinodal metallicity is mapped into the dynamics of the O-2p bands, thus directly demonstrating the intertwining between the low- and high-energy scales that is typical of correlated materials. Our results suggest that the correlation-driven freezing of the electrons moving along the Cu-O bonds, analogous to the Mott localization mechanism, constitutes the starting point for any model of high-T-c superconductivity and other exotic phases of HTSC cuprates.

引用

页数：7