Evidence for Short-Range Antiferromagnetic Fluctuations in Kondo-Insulating YbB12
Physical Review Letters Volume 94 Issue 24
Page 247204-1-247204-4
published_at 2005-06-21
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| File | |
| Title ( eng ) |
Evidence for Short-Range Antiferromagnetic Fluctuations in Kondo-Insulating YbB12
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| Creator |
Mignot Jean-Michel
Alekseev Pavel A.
Nemkovski K.S.
Regnault Louis-Pierre
Iga Fumitoshi
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| Source Title |
Physical Review Letters
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| Volume | 94 |
| Issue | 24 |
| Start Page | 247204-1 |
| End Page | 247204-4 |
| Abstract |
The spin dynamics of mixed-valence YbB12 has been studied by inelastic neutron scattering on a high-quality single crystal. In the Kondo-insulating regime realized at low temperature, the spectra exhibit a spin-gap structure with two sharp, dispersive, in-gap excitations at hω = 14.5 and = 20meV. The lower mode is shown to be associated with short-range correlations near the antiferromagnetic wave vector q0=(1/2, 1/2, 1/2). Its properties are in overall agreement with those expected for a "spin-exciton" branch in an indirect hybridization gap semiconductor.
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2005-06-21 |
| Rights |
Copyright (c) 2005 American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0031-9007
[DOI] 10.1103/PhysRevLett.94.247204
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.94.247204
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