Abstract
The presence (or absence) of spin glass phase in uniform magnetic field is studied in the three and four dimensional Edwards-Anderson Ising spin glass. Effective coupling Jeff and effective field Heff of each sample are measured by a numerical renormalization-group method, and their sample-to-sample fluctuations σJ and σH are estimated for various sizes L and fields H. As found in the Migdal-Kadanoff spin glass, σJ and σH are scaled as a function of L / ℓ (H), where ℓ (H) = H- 1 / ζ is the so-called overlap length. Furthermore, our data show that the scaling function of σJ drops to zero in the limit L / ℓ (H) → ∞. These results indicate the absence of spin glass phase even in an infinitesimal field.
Original language | English |
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Pages (from-to) | 1514-1516 |
Number of pages | 3 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 310 |
Issue number | 2 SUPPL. PART 2 |
DOIs | |
Publication status | Published - 2007 Mar 1 |
Keywords
- Almeida-Thouless line
- Monte Carlo
- Renormalization group
- Spin glass
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics