English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Spin dynamics in the pseudogap state of a high-temperature superconductor

MPS-Authors
/persons/resource/persons280055

Hinkov,  V.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons280365

Pailhès,  S.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons280238

Lin,  C. T.
Scientific Facility Crystal Growth (Masahiko Isobe), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons279844

Chen,  D. P.
Scientific Facility Crystal Growth (Masahiko Isobe), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons133799

Keimer,  B.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Hinkov, V., Bourges, P., Pailhès, S., Sidis, Y., Ivanov, A., Frost, C. D., et al. (2007). Spin dynamics in the pseudogap state of a high-temperature superconductor. Nature Physics, 3(11), 780-785.


Cite as: https://hdl.handle.net/21.11116/0000-000E-B65D-D
Abstract
The pseudogap is one of the most pervasive phenomena of high-temperature superconductors(1). It is attributed either to incoherent Cooper pairing setting in above the superconducting transition temperature, T c, or to a hidden order parameter competing with superconductivity. Here, we use inelastic neutron scattering from underdoped YBa2Cu3O6.6 to show that the dispersion relations of spin excitations in the superconducting and pseudogap states are qualitatively different. Specifically, the extensively studied 'hour glass' shape of the magnetic dispersions in the superconducting state(2-4) is no longer discernible in the pseudogap state and we observe an unusual 'vertical' dispersion with pronounced in-plane anisotropy. The differences between superconducting and pseudogap states are thus more profound than generally believed, suggesting a competition between these two states. Whereas the high-energy excitations are common to both states and obey the symmetry of the copper oxide square lattice, the low-energy excitations in the pseudogap state may be indicative of collective fluctuations towards a state with broken orientational symmetry predicted in theoretical work(5-8).