Dome-shaped magnetic order competing with high-temperature superconductivity at high pressures in FeSe

被引：252

作者：

Sun, J. P. ^{[1
,2
]}

Matsuura, K. ^{[3
]}

Ye, G. Z. ^{[1
,2
,4
]}

Mizukami, Y. ^{[3
]}

Shimozawa, M. ^{[5
]}

Matsubayashi, K. ^{[6
]}

Yamashita, M. ^{[5
]}

Watashige, T. ^{[7
]}

Kasahara, S. ^{[7
]}

Matsuda, Y. ^{[7
]}

Yan, J-Q. ^{[8
,9
]}

Sales, B. C. ^{[8
]}

Uwatoko, Y. ^{[5
]}

Cheng, J-G. ^{[1
,2
]}

Shibauchi, T. ^{[3
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[3] Univ Tokyo, Dept Adv Mat Sci, Kashiwa, Chiba 2778561, Japan

[4] Yunnan Univ, Sch Phys Sci & Technol, Kunming 650091, Peoples R China

[5] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

[6] Univ Electrocommun, Dept Engn Sci, Chofu, Tokyo 1828585, Japan

[7] Kyoto Univ, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan

[8] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[9] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

来源：

NATURE COMMUNICATIONS | 2016年 / 7卷

基金：

美国国家科学基金会;

关键词：

PHASE-DIAGRAM; CRYSTAL; DENSITY; FILMS;

D O I：

10.1038/ncomms12146

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The coexistence and competition between superconductivity and electronic orders, such as spin or charge density waves, have been a central issue in high transition-temperature (T-c) superconductors. Unlike other iron-based superconductors, FeSe exhibits nematic ordering without magnetism whose relationship with its superconductivity remains unclear. Moreover, a pressure-induced fourfold increase of Tc has been reported, which poses a profound mystery. Here we report high-pressure magnetotransport measurements in FeSe up to similar to 15 GPa, which uncover the dome shape of magnetic phase superseding the nematic order. Above similar to 6GPa the sudden enhancement of superconductivity (T-c <= 38.3 K) accompanies a suppression of magnetic order, demonstrating their competing nature with very similar energy scales. Above the magnetic dome, we find anomalous transport properties suggesting a possible pseudogap formation, whereas linear-in-temperature resistivity is observed in the normal states of the high-T-c phase above 6 GPa. The obtained phase diagram highlights unique features of FeSe among iron-based superconductors, but bears some resemblance to that of high-T-c cuprates.

引用

页数：7

共 43 条

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PHYSICAL REVIEW B, 2015, 91 (15)

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