منابع مشابه
Antiferromagnetic Spin Chain with Bond Alternation
i(1 − (−1)δ)Si · Si+1 by the density matrix renormalization group method recently proposed by Steven R. White (Phys. Rev. Lett. 69 (1993) 3844). We find a massless point at δc = 0.25 ± 0.01. We also find the edge states in the region δ < δc under the open boundary condition, which disappear in the region δ > δc. At the massless point, the spin wave velocity vs is 3.66 ± 0.10 and the central cha...
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We derive structure-property relationships for methine ("Brooker") dyes relating the color of the dye and its symmetric parents to its bond alternation in the ground state and also to the dipole properties associated with its low-lying charge-resonance (or charge-transfer) transition. We calibrate and test these relationships on an array of different protonation states of the green fluorescent ...
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Magnetic properties of spin-1 antiferromagnetic chains with bond alternation Masayuki Hagiwara,∗1,∗2,∗3 Yasuo Narumi,∗3 Koichi Kindo,∗3 Masanori Kohno,∗4 Hiroki Nakano,∗5 Ryutaro Sato,∗6 and Minoru Takahashi∗7 ∗1Magnetic Materials Laboratory, RIKEN ∗2Faculty of Integrated Science, Yokohama City University ∗3Research Center for Materials Science at Extreme Conditions, Osaka University ∗4Mitsubis...
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We have investigated the dependence of the static first hyperpolarizability on the bond-length alternation (BLA) parameter. Our analysis indicates that the validity of the first hyperpolarizability/BLA parameter relationship is restricted to the no-field, vacuum, limit, while it successively breaks down along with increasing polarity of a surrounding medium, becoming invalid, for instance, in a...
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The S = 1/2 XXZ spin chain with the staggered XY anisotropy
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1986
ISSN: 0033-068X,1347-4081
DOI: 10.1143/ptp.75.1283