Nonlinear Electron-Phonon Coupling in Doped Manganites

被引：32

作者：

Esposito, V. ^{[1
]}

Fechner, M. ^{[2
,3
]}

Mankowsky, R. ^{[2
,4
]}

Lemke, H. ^{[5
,6
]}

Chollet, M. ^{[5
]}

Glownia, J. M. ^{[5
]}

Nakamura, M. ^{[7
]}

Kawasaki, M. ^{[7
,8
,9
]}

Tokura, Y. ^{[7
,8
,9
]}

Staub, U. ^{[1
]}

Beaud, P. ^{[1
,6
]}

Foerst, M. ^{[2
,4
]}

机构：

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

[2] Max Planck Inst Struct & Dynam Matter, D-22761 Hamburg, Germany

[3] Swiss Fed Inst Technol, Mat Theory, Wolfgang Pauli Str 27, CH-8093 Zurich, Switzerland

[4] Ctr Free Electron Laser Sci, D-22761 Hamburg, Germany

[5] SLAC Natl Accelerator Lab, LCLS, Menlo Pk, CA 94025 USA

[6] Paul Scherrer Inst, SwissFEL, CH-5232 Villigen, Switzerland

[7] RIKEN Ctr Emergent Matter Sci, Wako, Saitama 3510198, Japan

[8] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

[9] Univ Tokyo, QPEC, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 24期

基金：

瑞士国家科学基金会; 日本科学技术振兴机构;

关键词：

PHASE; WAVE; SUPERCONDUCTIVITY; DYNAMICS;

D O I：

10.1103/PhysRevLett.118.247601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We employ time-resolved resonant x-ray diffraction to study the melting of charge order and the associated insulator-to-metal transition in the doped manganite Pr0.5Ca0.5MnO3 after resonant excitation of a high-frequency infrared-active lattice mode. We find that the charge order reduces promptly and highly nonlinearly as function of excitation fluence. Density-functional theory calculations suggest that direct anharmonic coupling between the excited lattice mode and the electronic structure drives these dynamics, highlighting a new avenue of nonlinear phonon control.

引用

页数：5

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