Magnetothermoelectric Response at a Superfluid--Mott Insulator Transition

Details Magnetothermoelectric Response at a Superfluid--Mott Insulator Transition Magnetothermoelectric Response at a Superfluid--Mott Insulator Transition

2006-10-25

arxiv.org/abs/cond-mat/0610687v1

Phys. Rev. Lett. 98, 166801 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages

Scientific paper

10.1103/PhysRevLett.98.179901

We investigate the finite temperature magnetothermoelectric response in the vicinity of a superfluid--Mott insulator quantum phase transition. We focus on the particle-hole symmetric transitions of the Bose--Hubbard model, and combine Lorentz invariance arguments with quantum Boltzmann calculations. By means of an epsilon expansion, we find that a non-vanishing thermoelectric tensor and a finite thermal conductivity are supported in this quantum critical regime. We comment on the singular Nernst effect in this problem.

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