Continuum quantum ferromagnets at finite temperature and the Quantum Hall effect

Details Continuum quantum ferromagnets at finite temperature and the Quantum Hall effect Continuum quantum ferromagnets at finite temperature and the Quantum Hall effect

1995-07-24

arxiv.org/abs/cond-mat/9507103v1

Physical Review Letters 75, 3509 (1995)

Physics

Condensed Matter

11 pages, REVTEX 3.0, 3 postscript figures

Scientific paper

10.1103/PhysRevLett.75.3509

We study finite temperature ($T$) properties of the continuum quantum field theory of systems with a ferromagnetic ground state. A scaling theory of the $T=0$ system is discussed carefully, and its consequences for crossovers between different finite $T$ regimes in dimensions 1, 2, and 3 are described. The results are compared with recent NMR measurements of the magnetization of a quantum Hall system with filling factor $\nu=1$; we predict that the relaxation rate $1/T_1$ of this system may have a finite $T$ ``ferromagnetic coherence peak''.

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