Charge transport near pressure-induced antiferromagnetic quantum critical point in Magneli-phase vanadium oxides

被引：5

作者：

Ueda, H

Kitazawa, K

Matsumoto, T

Takagi, H

机构：

[1] RIKEN, Inst Phys & Chem Res, Magnet Mat Lab, Wako, Saitama 3510198, Japan

[2] Univ Tokyo, Dept Appl Chem, Bunkyo Ku, Tokyo 1138656, Japan

[3] Univ Tokyo, Dept Adv Mat Sci, Bunkyo Ku, Tokyo 1138656, Japan

[4] Natl Inst Mat Sci, Mat Engn Lab, Tsukuba, Ibaraki 3050047, Japan

[5] Natl Inst Adv Ind Sci & Technol, CERC, AIST Tsukuba Cent 4, Tsukuba, Ibaraki 3058562, Japan

来源：

SOLID STATE COMMUNICATIONS | 2003年 / 125卷 / 02期

关键词：

magnetically ordered materials; electronic transport; phase transitions; strain; high pressure;

D O I：

10.1016/S0038-1098(02)00716-0

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Resistivity (p) measurements on Magneli phases V7O13 and V8O15 were performed under high pressures up to 3.5GPa. We have achieved a pressure-induced transition from an antiferromagnetic metal to a paramagnetic metal (PM) at critical pressures P-c approximate to 3.4 and 3.3 GPa for V7O13 and V8O15, respectively. The critical behavior of rho(T) near P-c turned out to be quite unusual in that no noticeable precursor effect was observed. This strongly contrasts with the canonical quantum critical point behavior observed in chemically modified systems such as Ni(S, Se)(2) and V2O3. We propose that the presence of two distinct Fermi surface segments is responsible for the observed unusual behaviors. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：83 / 87

页数：5

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