Journal
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
Volume 27, Issue 5, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217979213300028
Keywords
Antiferromagnetic triangular lattice; geometrical frustration; delafossite; hole-doping; order by disorder; spin liquid; spin nematic
Funding
- [2009A0073]
- [19052001]
- [19052004]
- [20340097]
- Grants-in-Aid for Scientific Research [22560786, 23840039] Funding Source: KAKEN
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In this review, we will discuss the effects of itinerant hole and disorder produced by substitutions on the magnetic states of polycrystalline delafossite oxide CuCrO2 having a spin-3/2 antiferromagnetic triangular sublattice. First, we will show the effects of hole-doping by the substitution of nonmagnetic Mg2+ for magnetic Cr3+ on the physical properties of CuCrO2, and will discuss the origin of nontrivial promotion of the 120 degrees Neel state due to the coupling between the itinerant hole and localized spin. Next, we will show the effects of disorder introduced by the isovalent substitutions such as the nonmagnetic Ag+ substitution for nonmagnetic Cu+ and the nonmagnetic Al3+ one for magnetic Cr3+, and will discuss the possibility of appearance of unusual magnetic states such as spin liquid or spin nematic states.
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