High-temperature superconductivity (Tc onset at 34 K) in the high-pressure orthorhombic phase of FeSe

被引：111

作者：

Garbarino, G. ^{[1
]}

Sow, A. ^{[2
,3
]}

Lejay, P. ^{[2
,3
]}

Sulpice, A. ^{[2
,3
]}

Toulemonde, P. ^{[2
,3
]}

Mezouar, M. ^{[1
]}

Nunez-Regueiro, M. ^{[2
,3
]}

机构：

[1] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[2] CNRS, Inst NEEL, F-38042 Grenoble 9, France

[3] Univ Grenoble 1, F-38042 Grenoble 9, France

来源：

EPL | 2009年 / 86卷 / 02期

关键词：

CRYSTAL-STRUCTURE;

D O I：

10.1209/0295-5075/86/27001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied the structural and superconducting properties of beta-FeSe under pressures up to 26 GPa using synchrotron radiation and diamond anvil cells. The bulk modulus of the tetragonal phase is 28.5(3) GPa, much smaller than the rest of Fe based superconductors. At 12 GPa we observe a phase transition from the tetragonal to an orthorhombic symmetry. The high-pressure orthorhombic phase has a higher T-c reaching 34 K at 22 GPa. Copyright (C) EPLA, 2009

引用

页数：6

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