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16 papers · 2 filters
Duality relations and exotic orders in electronic ladder systems
Tsutomu Momoi, Toshiya Hikihara
We discuss duality relations in correlated electronic ladder systems to clarify mutual relations between various conventional and unconventional phases. For the generalized two-leg…
Half-ordered state in the anisotropic Haldane-gap antiferromagnet NDMAP
A. Zheludev, B. Grenier, E. Ressouche +2
Neutron diffraction experiments performed on the Haldane gap material NDMAP in high magnetic fields applied at an angle to the principal anisotropy axes reveal two consecutive fiel…
Phase transitions in spin-orbital coupled model for pyroxene titanium oxides
Toshiya Hikihara, Yukitoshi Motome
We study the competing phases and the phase transition phenomena in an effective spin-orbital coupled model derived for pyroxene titanium oxides ATiSi2O6 (A=Na, Li). Using the mean…
Spin Frustration and Orbital Order in Vanadium Spinels
Yukitoshi Motome, Hirokazu Tsunetsugu
We present the results of our theoretical study on the effects of geometrical frustration and the interplay between spin and orbital degrees of freedom in vanadium spinel oxides $A…
High-field phase diagram of the Haldane-gap antiferromagnet
H. Tsujii, Z. Honda, B. Andraka +2
We have determined the magnetic phase diagram of the quasi-one-dimensional 1 Heisenberg antiferromagnet by specific heat measurements to 150…
Excitation spectrum of d-wave Fermi surface deformation
Hiroyuki Yamase
Several instabilities competing with the d-wave singlet pairing were proposed for high-Tc cuprates. One of them is the d-wave Fermi surface deformation (dFSD), which is generated b…