Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2
Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2
复制标题
DOI：
10.1143/jpsj.81.053701
复制
发表时间：
2012-05-01
影响因子：
1.7
通讯作者：
Nohara, Minoru
中科院分区：
文献类型：
--
作者：
Pyon, Sunseng;Kudo, Kazutaka;Nohara, Minoru
IrTe 2是一种具有三角形铱晶格的层状化合物，在约250 K时表现出结构相变。这种转变的特征在于沿b轴形成了沿着方向的Ir-Ir键。我们发现，在Ir 1-xPtxTe 2中发生的Ir-Ir键的断裂导致在T = 0极限中在x（c）类似或等于0.035处出现结构临界点。虽然IrTe 2和PtTe 2都是顺磁金属，但在Tc = 3.1K时，Ir 1-xPtxTe 2中的键断裂在x >= x（c）的窄范围内引起超导性。这一结果表明，结构波动可以参与超导电性的出现。
IrTe2, a layered compound with a triangular iridium lattice, exhibits a structural phase transition at approximately 250 K. This transition is characterized by the formation of Ir-Ir bonds along the b-axis. We found that the breaking of Ir-Ir bonds that occurs in Ir1-xPtxTe2 results in the appearance of a structural critical point in the T = 0 limit at x(c) similar or equal to 0.035. Although both IrTe2 and PtTe2 are paramagnetic metals, superconductivity at T-c = 3.1 K is induced by the bond breaking in a narrow range of x >= x(c) in Ir1-xPtxTe2. This result indicates that structural fluctuations can be involved in the emergence of superconductivity.