Ultrafast Photovoltaic Response in Ferroelectric Nanolayers

被引：152

作者：

Daranciang, Dan ^{[1
,2
,3
]}

Highland, Matthew J. ^{[4
]}

Wen, Haidan ^{[5
]}

Young, Steve M. ^{[6
]}

Brandt, Nathaniel C. ^{[7
]}

Hwang, Harold Y. ^{[7
]}

Vattilana, Michael ^{[8
,9
]}

Nicoul, Matthieu ^{[8
,9
]}

Quirin, Florian ^{[8
,9
]}

Goodfellow, John ^{[2
,3
,10
]}

Qi, Tingting ^{[6
]}

Grinberg, Ilya ^{[6
]}

Fritz, David M. ^{[11
]}

Cammarata, Marco ^{[11
]}

Zhu, Diling ^{[11
]}

Lemke, Henrik T. ^{[11
,12
]}

Walko, Donald A. ^{[5
]}

Dufresne, Eric M. ^{[5
]}

Li, Yuelin ^{[5
]}

Larsson, Jorgen ^{[13
]}

Reis, David A. ^{[2
,3
,14
]}

Sokolowski-Tinten, Klaus ^{[8
,9
]}

Nelson, Keith A. ^{[7
]}

Rappe, Andrew M. ^{[6
]}

Fuoss, Paul H. ^{[4
]}

Stephenson, G. Brian ^{[4
,5
]}

Lindenberg, Aaron M. ^{[2
,3
,10
]}

机构：

[1] Stanford Univ, Dept Chem, Stanford, CA 94305 USA

[2] SLAC Natl Accelerator Lab, PULSE Inst Ultrafast Energy Sci, Menlo Pk, CA 94025 USA

[3] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA

[4] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[5] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[6] Univ Penn, Dept Chem, Makineni Theoret Labs, Philadelphia, PA 19104 USA

[7] MIT, Dept Chem, Cambridge, MA 02139 USA

[8] Univ Duisburg Essen, Fac Phys, D-47048 Duisburg, Germany

[9] Univ Duisburg Essen, Ctr Nanointegrat Duisburg Essen CENIDE, D-47048 Duisburg, Germany

[10] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[11] SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA

[12] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark

[13] Lund Univ, Dept Phys, S-22100 Lund, Sweden

[14] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 08期

关键词：

PHASE-TRANSITION; WAVELENGTH; CURRENTS; SHIFT;

D O I：

10.1103/PhysRevLett.108.087601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that light drives large-amplitude structural changes in thin films of the prototypical ferroelectric PbTiO3 via direct coupling to its intrinsic photovoltaic response. Using time-resolved x-ray scattering to visualize atomic displacements on femtosecond time scales, photoinduced changes in the unit-cell tetragonality are observed. These are driven by the motion of photogenerated free charges within the ferroelectric and can be simply explained by a model including both shift and screening currents, associated with the displacement of electrons first antiparallel to and then parallel to the ferroelectric polarization direction.

引用

页数：6

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