Magnetic Field Independence of the Spin Gap inYBa2Cu3O7−δ
نویسندگان
چکیده
منابع مشابه
Magnetic-field-induced spin excitations and renormalized spin gap of the underdoped La1.895Sr0.105CuO4 superconductor.
High-resolution neutron inelastic scattering experiments in applied magnetic fields have been performed on La1.895Sr0.105CuO4 (LSCO). In zero field, the temperature dependence of the low-energy peak intensity at the incommensurate momentum transfer QIC=(0.5,0.5+/-delta,0),(0.5+/-delta,0.5,0) exhibits an anomaly at the superconducting Tc which broadens and shifts to lower temperature upon the ap...
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Specific heat measurements have been performed in the coupled dimer system TlCuCl 3 , which has a singlet ground state with the excitation gap ∆ ≃ 7.5K. The cusplike anomaly indicative of the 3D magnetic ordering was clearly observed in magnetic fields higher than the critical field H c corresponding to the gap ∆. The phase boundary determined by the present specific heat measurements coincides...
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Specific heat measurements have been performed in the coupled dimer system TlCuCl3, which has a singlet ground state with the excitation gap ∆ ≃ 7.5K. The cusplike anomaly indicative of the 3D magnetic ordering was clearly observed in magnetic fields higher than the critical field Hg corresponding to the gap ∆. The phase boundary determined by the present specific heat measurements coincides wi...
متن کاملentanglement in the xz spin chain model in the external magnetic field
the entanglement at zero-temperature is studied in a two-qubit xz spin-1/2 chain model in anexternal magnetic field which is applied in the z direction. we have obtained an analytical relation forthe effect of the external magnetic field on the concurrence. it is shown that the ground state of thesystem depends on the strength of exchange coupling. we have shown that the analytical relation oft...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1999
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.82.177