TY - JOUR
T1 - High-energy magnetic excitations in underdoped La1.90Sr0.10CuO4
AU - Sato, Kentaro
AU - Matsuura, Masato
AU - Fujita, Masaki
AU - Kajimoto, Ryoichi
AU - Ji, Sungdae
AU - Ikeuchi, Kazuhiko
AU - Nakamura, Mitsutaka
AU - Inamura, Yasuhiro
AU - Arai, Masatoshi
AU - Enoki, Masanori
AU - Yamada, Kazuyoshi
N1 - Funding Information:
We are grateful to M. Hagiwara and T. Masuda for their help in the crystal alignment. MF and MM were supported by Grants-in-Aid for Scientific Research (B) (23340093) and for Encouragement of Young Scientist (B) (22740230) from the Japanese Ministry of Education, Culture, Sports, Science and Technology. The experiment at J-PARC was carried out under Project No. 2009A0093.
PY - 2013/7
Y1 - 2013/7
N2 - We measured the magnetic excitations in underdoped (UD) La1.90Sr0.10CuO4 by using inelastic neutron scattering over a wide energy range. We succeeded in observing the high-energy excitations up to ≃160 meV. Hour-glass-like magnetic excitation, which is commonly seen in the superconducting phase of cuprate oxides, was confirmed. The E cross (the energy where the dispersion is closest to the (1/2, 1/2) reciprocal position) of ∼40 meV follows a linear relation between E cross and the doped hole concentration in the UD region. From the dispersion of high-energy excitations above E cross, we successfully found an effective nearest neighbor interaction (J eff) of 102 ± 2 meV. This J eff is smaller than the nearest neighbor interaction J(=132 meV) in the parent compound La2CuO4, indicating a reduction of J eff by hole-doping.
AB - We measured the magnetic excitations in underdoped (UD) La1.90Sr0.10CuO4 by using inelastic neutron scattering over a wide energy range. We succeeded in observing the high-energy excitations up to ≃160 meV. Hour-glass-like magnetic excitation, which is commonly seen in the superconducting phase of cuprate oxides, was confirmed. The E cross (the energy where the dispersion is closest to the (1/2, 1/2) reciprocal position) of ∼40 meV follows a linear relation between E cross and the doped hole concentration in the UD region. From the dispersion of high-energy excitations above E cross, we successfully found an effective nearest neighbor interaction (J eff) of 102 ± 2 meV. This J eff is smaller than the nearest neighbor interaction J(=132 meV) in the parent compound La2CuO4, indicating a reduction of J eff by hole-doping.
KW - High-T superconductor
KW - Inelastic neutron scattering
KW - LaSrCuO
KW - Magnetic excitation
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U2 - 10.3938/jkps.62.1836
DO - 10.3938/jkps.62.1836
M3 - Article
AN - SCOPUS:84880008100
SN - 0374-4884
VL - 62
SP - 1836
EP - 1839
JO - Journal of the Korean Physical Society
JF - Journal of the Korean Physical Society
IS - 12
ER -