TY - JOUR
T1 - Revealing the pseudogap in Sr3(Ru0.985Fe0.015)2 O7 by optical spectroscopy
AU - Ban, W. J.
AU - Xu, B.
AU - Li, W. H.
AU - Wang, Y.
AU - Ge, J. J.
AU - Li, P. G.
AU - Yang, R.
AU - Dai, Y. M.
AU - Mao, Z. Q.
AU - Xiao, H.
N1 - Funding Information:
We would like to thank N. L. Wang and Z. G. Chen for the experimental facility and assistance for optical reflectance measurements, and acknowledge the support of NSAF, Grant No. U1530402. The work (single crystal growth and characterization) at Tulane is supported by the U.S. Department of Energy (DOE) under EPSCoR Grant No. DE-SC0012432 with additional support from the Louisiana Board of Regents.
Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/11/6
Y1 - 2018/11/6
N2 - We report resistivity, magnetization, and optical spectroscopy study on single-crystal sample of Sr3(Ru0.985Fe0.015)2O7. An upturn is observed in resistivity at about 30 K. Below 30 K, the dip in resistivity R(ω), the suppression in scattering rate 1/τ(ω), the peaklike feature in optical conductivity σ1(ω), and the remainder of spectral weight all suggest the formation of a pseudogap. In addition, one phonon peak at about 600cm-1 is distinguished at all temperatures, which has asymmetric line shape. Such asymmetric line shape can be fit by a Fano function, and the resulting Fano factor 1/q2 and linewidth γ show significant increases below 30 K, giving further evidence for the formation of a pseudogap, which might originate from the partial k-space gap opening due to density wave instability.
AB - We report resistivity, magnetization, and optical spectroscopy study on single-crystal sample of Sr3(Ru0.985Fe0.015)2O7. An upturn is observed in resistivity at about 30 K. Below 30 K, the dip in resistivity R(ω), the suppression in scattering rate 1/τ(ω), the peaklike feature in optical conductivity σ1(ω), and the remainder of spectral weight all suggest the formation of a pseudogap. In addition, one phonon peak at about 600cm-1 is distinguished at all temperatures, which has asymmetric line shape. Such asymmetric line shape can be fit by a Fano function, and the resulting Fano factor 1/q2 and linewidth γ show significant increases below 30 K, giving further evidence for the formation of a pseudogap, which might originate from the partial k-space gap opening due to density wave instability.
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U2 - 10.1103/PhysRevB.98.205111
DO - 10.1103/PhysRevB.98.205111
M3 - Article
AN - SCOPUS:85056376588
SN - 2469-9950
VL - 98
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 20
M1 - 205111
ER -