TY - JOUR
T1 - Quantum criticalities induced by Lifshitz transitions
AU - Yamaji, Youhei
AU - Misawa, Takahiro
AU - Imada, Masatoshi
PY - 2007/3/1
Y1 - 2007/3/1
N2 - We study electron correlation effects on quantum criticalities of Lifshitz transitions (LTs), using the mean-field theory based on a preexisting broken symmetry order, in two-dimensional systems. In the presence of interactions, LTs may become discontinuous in contrast to the continuous transition in the original proposal by Lifshitz for noninteracting systems. We find that the quantum criticality at the endpoint of discontinuous LTs, which we call the marginal quantum critical point, belongs to a different universality class from that of the mean-field Ising model.
AB - We study electron correlation effects on quantum criticalities of Lifshitz transitions (LTs), using the mean-field theory based on a preexisting broken symmetry order, in two-dimensional systems. In the presence of interactions, LTs may become discontinuous in contrast to the continuous transition in the original proposal by Lifshitz for noninteracting systems. We find that the quantum criticality at the endpoint of discontinuous LTs, which we call the marginal quantum critical point, belongs to a different universality class from that of the mean-field Ising model.
KW - Fermi surface topology
KW - Lifshitz transition
KW - Quantum critical phenomena
KW - Universality
UR - http://www.scopus.com/inward/record.url?scp=33847252512&partnerID=8YFLogxK
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U2 - 10.1016/j.jmmm.2006.10.713
DO - 10.1016/j.jmmm.2006.10.713
M3 - Article
AN - SCOPUS:33847252512
VL - 310
SP - 838
EP - 840
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
IS - 2 SUPPL. PART 1
ER -