Rotational symmetry breaking in Bi2Sr2CaCu2O8+δ probed by polarized femtosecond spectroscopy

被引：43

作者：

Toda, Y. ^{[1
]}

Kawanokami, F. ^{[1
]}

Kurosawa, T. ^{[2
]}

Oda, M. ^{[2
]}

Madan, I. ^{[3
]}

Mertelj, T. ^{[3
]}

Kabanov, V. V. ^{[3
]}

Mihailovic, D. ^{[3
]}

机构：

[1] Hokkaido Univ, Dept Appl Phys, Sapporo, Hokkaido 0608628, Japan

[2] Hokkaido Univ, Dept Phys, Sapporo, Hokkaido 0600810, Japan

[3] Jozef Stefan Inst, Complex Matter Dept, SI-1000 Ljubljana, Slovenia

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 09期

基金：

日本学术振兴会; 欧洲研究理事会;

关键词：

DOPED MOTT INSULATOR; SUPERCONDUCTING GAP; PSEUDOGAP STATE; ENERGY; EVOLUTION; DYNAMICS; SPECTRA; CUPRATE;

D O I：

10.1103/PhysRevB.90.094513

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The quasiparticle (QP) dynamics with different symmetry is investigated in the superconducting (SC) and normal state of the high-temperature superconductor Bi2Sr2CaCu2O8+delta (Bi2212) using optical pump-probe experiments with different light polarizations at different doping levels. The observation of distinct selection rules for SC excitations present in A(1g) and B-1g symmetries, and for the pseudogap (PG) excitations present in A(1g) and B-2g symmetries by the probe, and absence of any dependence on the pump beam polarization leads to the unequivocal conclusion of the existence of a spontaneous spatial symmetry breaking in the PG state not limited to the sample surface.

引用

页数：5

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