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Title: The rate of quasiparticle recombination probes the onset of coherence in cuprate superconductors

Abstract

In the underdoped copper-oxides, high-temperature superconductivity condenses from a nonconventional metallic ”pseudogap” phase that exhibits a variety of non-Fermi liquid properties. Recently, it has become clear that a charge density wave (CDW) phase exists within the pseudogap regime. This CDW coexists and competes with superconductivity (SC) below the transition temperature T c, suggesting that these two orders are intimately related. Here we show that the condensation of the superfluid from this unconventional precursor is reflected in deviations from the predictions of BSC theory regarding the recombination rate of quasiparticles. We report a detailed investigation of the quasiparticle (QP) recombination lifetime, τ qp, as a function of temperature and magnetic field in underdoped HgBa 2CuO 4+δ (Hg-1201) and YBa 2Cu 3O 6+x (YBCO) single crystals by ultrafast time-resolved reflectivity. We find that τ qp(T) exhibits a local maximum in a small temperature window near T c that is prominent in underdoped samples with coexisting charge order and vanishes with application of a small magnetic field. We explain this unusual, non-BCS behavior by positing that T c marks a transition from phase-fluctuating SC/CDW composite order above to a SC/CDW condensate below. Lastly, our results suggest that the superfluid in underdoped cuprates ismore » a condensate of coherently-mixed particle-particle and particle-hole pairs.« less

Authors:
 [1];  [2];  [3];  [3];  [4];  [5];  [5];  [5];  [5];  [6];  [7];  [7];  [7];  [3];  [5];  [8];  [8]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States); Univ. of California, San Diego, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Univ. of Minnesota, Minneapolis, MN (United States)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); North Carolina State Univ., Raleigh, NC (United States)
  7. Univ. of British Columbia, Vancouver (Canada); Canadian Inst. Adv. Res., Toronto, ON (Canada)
  8. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1252487
Alternate Identifier(s):
OSTI ID: 1379285
Grant/Contract Number:  
AC02-76SF00515; SC0006858; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; superconducting properties and materials

Citation Formats

Hinton, J. P., Thewalt, E., Alpichshev, Z., Mahmood, F., Koralek, J. D., Chan, M. K., Veit, M. J., Dorow, C. J., Barisic, N., Kemper, A. F., Bonn, D. A., Hardy, W. N., Liang, Ruixing, Gedik, N., Greven, M., Lanzara, A., and Orenstein, J. The rate of quasiparticle recombination probes the onset of coherence in cuprate superconductors. United States: N. p., 2016. Web. doi:10.1038/srep23610.
Hinton, J. P., Thewalt, E., Alpichshev, Z., Mahmood, F., Koralek, J. D., Chan, M. K., Veit, M. J., Dorow, C. J., Barisic, N., Kemper, A. F., Bonn, D. A., Hardy, W. N., Liang, Ruixing, Gedik, N., Greven, M., Lanzara, A., & Orenstein, J. The rate of quasiparticle recombination probes the onset of coherence in cuprate superconductors. United States. doi:10.1038/srep23610.
Hinton, J. P., Thewalt, E., Alpichshev, Z., Mahmood, F., Koralek, J. D., Chan, M. K., Veit, M. J., Dorow, C. J., Barisic, N., Kemper, A. F., Bonn, D. A., Hardy, W. N., Liang, Ruixing, Gedik, N., Greven, M., Lanzara, A., and Orenstein, J. Wed . "The rate of quasiparticle recombination probes the onset of coherence in cuprate superconductors". United States. doi:10.1038/srep23610. https://www.osti.gov/servlets/purl/1252487.
@article{osti_1252487,
title = {The rate of quasiparticle recombination probes the onset of coherence in cuprate superconductors},
author = {Hinton, J. P. and Thewalt, E. and Alpichshev, Z. and Mahmood, F. and Koralek, J. D. and Chan, M. K. and Veit, M. J. and Dorow, C. J. and Barisic, N. and Kemper, A. F. and Bonn, D. A. and Hardy, W. N. and Liang, Ruixing and Gedik, N. and Greven, M. and Lanzara, A. and Orenstein, J.},
abstractNote = {In the underdoped copper-oxides, high-temperature superconductivity condenses from a nonconventional metallic ”pseudogap” phase that exhibits a variety of non-Fermi liquid properties. Recently, it has become clear that a charge density wave (CDW) phase exists within the pseudogap regime. This CDW coexists and competes with superconductivity (SC) below the transition temperature Tc, suggesting that these two orders are intimately related. Here we show that the condensation of the superfluid from this unconventional precursor is reflected in deviations from the predictions of BSC theory regarding the recombination rate of quasiparticles. We report a detailed investigation of the quasiparticle (QP) recombination lifetime, τqp, as a function of temperature and magnetic field in underdoped HgBa2CuO4+δ (Hg-1201) and YBa2Cu3O6+x (YBCO) single crystals by ultrafast time-resolved reflectivity. We find that τqp(T) exhibits a local maximum in a small temperature window near Tc that is prominent in underdoped samples with coexisting charge order and vanishes with application of a small magnetic field. We explain this unusual, non-BCS behavior by positing that Tc marks a transition from phase-fluctuating SC/CDW composite order above to a SC/CDW condensate below. Lastly, our results suggest that the superfluid in underdoped cuprates is a condensate of coherently-mixed particle-particle and particle-hole pairs.},
doi = {10.1038/srep23610},
journal = {Scientific Reports},
number = ,
volume = 6,
place = {United States},
year = {2016},
month = {4}
}

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    Works referencing / citing this record:

    Local particle-hole pair excitations by SU(2) symmetry fluctuations
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