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Volumn 80, Issue 4, 2009, Pages

Quantum critical dynamics of an S= 1 2 antiferromagnetic Heisenberg chain studied by C 13 NMR spectroscopy

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EID: 69949135433     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.80.045110     Document Type: Article
Times cited : (40)

References (39)
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    • The q=0 hyperfine coupling tensor A (0) can be disentangled into A dip (0) and Aiso (0) from the angular dependence of the NMR-frequency shift δ= 1 B2 [B { [A dip (0) + Aiso (0)] χel + σ } B], where χel is the tensor of the electronic susceptibility and σ is the diamagnetic tensor. A comparison of the measured and simulated δ [Fig. 1] yields a minimum of δdip (0) for the high frequency peak close to an angle of β=50°. Since A dip (q) scales with A dip (0), this orientation with δiso (0) / δdip (0) ≈4 was used for all subsequent measurements shown in Figs. 2 3 4. Note that the simulation also yields the splitting of the high-frequency peak due to a misalignment between the rotation axis and the a axis of the crystal by ∼5°.
    • The q=0 hyperfine coupling tensor A (0) can be disentangled into A dip (0) and Aiso (0) from the angular dependence of the NMR-frequency shift δ= 1 B2 [B { [A dip (0) + Aiso (0)] χel + σ } B], where χel is the tensor of the electronic susceptibility and σ is the diamagnetic tensor. A comparison of the measured and simulated δ [Fig. 1] yields a minimum of δdip (0) for the high frequency peak close to an angle of β=50°. Since A dip (q) scales with A dip (0), this orientation with δiso (0) / δdip (0) ≈4 was used for all subsequent measurements shown in Figs. 2 3 4. Note that the simulation also yields the splitting of the high-frequency peak due to a misalignment between the rotation axis and the a axis of the crystal by ∼5°.
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.