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Low-energy collective dynamics of charge stripes in the doped nickelate La2-xSrxNiO4+delta observed with optical conductivity measurements

Abstract:

We have investigated charge dynamics in the static stripe ordered phase of La2-x Srx Ni O4+δ at lattice temperatures below the charge ordering transition, via optical conductivity measurements at low energies (1-10 meV). The thermally activated dynamic response of the charge stripes is found to be characteristic of a collective mode such as a pinned charge density wave. At incommensurate doping levels, the pinning energy is reduced, owing to the presence of real-space defects in the stripe or...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.77.195114

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Condensed Matter Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Condensed Matter Physics
Role:
Author
Journal:
Physical Review B
Volume:
77
Issue:
19
Publication date:
2008-05-01
DOI:
EISSN:
1550-235X
ISSN:
1098-0121
Source identifiers:
5615
Language:
English
Pubs id:
pubs:5615
UUID:
uuid:3672cb72-fffd-4004-ac3f-e889d2a6e18a
Local pid:
pubs:5615
Deposit date:
2012-12-19

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