Recent advances in unconventional density waves

被引:26
作者
Dóra, B [1 ]
Maki, K [1 ]
Virosztek, A [1 ]
机构
[1] Abdus Salam Int Ctr Theoret Phys, I-34014 Trieste, Italy
来源
MODERN PHYSICS LETTERS B | 2004年 / 18卷 / 09期
关键词
unconventional density waves; angle-dependent magnetoresistance; Nernst effect; pseudogap phase; organic conductors d-wave density wave;
D O I
10.1142/S0217984904006925
中图分类号
O59 [应用物理学];
学科分类号
摘要
The unconventional density wave (UDW) was speculated on as a possible electronic ground state in the excitonic insulator in 1968. The recent surge of interest in UDW's is partly due to the proposal that the pseudogap phase in high T-c cuprate superconductors is a d-wave density wave (d-DW). Here we review our recent works on UDW's within the framework of mean field theory. In particular, we have shown that many properties of the low temperature phase (LTP) in alpha-(BEDT-TTF)(2)MHg(SCN)(4), with M = K, Rb and Tl, are well characterized in terms of the unconventional charge density wave (UCDW). In this identification the Landau quantization of the quasiparticle motion in a magnetic field (the Nersesyan effect) plays the crucial role. Indeed, the angle-dependent magnetoresistance and the negative giant Nernst effect are two hallmarks of UDW's.
引用
收藏
页码:327 / 344
页数:18
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