Femtosecond Response of Quasiparticles and Phonons in Superconducting YBa2Cu3O7-δ Studied by Wideband Terahertz Spectroscopy

被引：113

作者：

Pashkin, A. ^{[1
,2
]}

Porer, M. ^{[1
,2
]}

Beyer, M. ^{[1
,2
]}

Kim, K. W. ^{[1
,2
,3
]}

Dubroka, A. ^{[3
]}

Bernhard, C. ^{[3
]}

Yao, X. ^{[4
]}

Dagan, Y. ^{[5
]}

Hackl, R. ^{[6
]}

Erb, A. ^{[6
]}

Demsar, J. ^{[1
,2
,7
]}

Huber, R. ^{[1
,2
]}

Leitenstorfer, A. ^{[1
,2
]}

机构：

[1] Univ Konstanz, Dept Phys, D-78457 Constance, Germany

[2] Univ Konstanz, Ctr Appl Photon, D-78457 Constance, Germany

[3] Univ Fribourg, Dept Phys, CH-1700 Fribourg, Switzerland

[4] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China

[5] Tel Aviv Univ, Raymond & Beverly Sackler Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[6] Walther Meissner Inst Tieftemp Forsch, D-85748 Garching, Germany

[7] Jozef Stefan Inst, Complex Matter Dept, Ljubljana, Slovenia

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 06期

关键词：

T-C SUPERCONDUCTORS; SINGLE-CRYSTALS; ELECTRON; ANOMALIES; T(C);

D O I：

10.1103/PhysRevLett.105.067001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We measure the anisotropic midinfrared response of electrons and phonons in bulk YBa2Cu3O7-delta after femtosecond photoexcitation. A line shape analysis of specific lattice modes reveals their transient occupation and coupling to the superconducting condensate. The apex oxygen vibration is strongly excited within 150 fs, demonstrating that the lattice absorbs a major portion of the pump energy before the quasiparticles are thermalized. Our results attest to substantial electron-phonon scattering and introduce a powerful concept probing electron-lattice interactions in a variety of complex materials.

引用

页数：4

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