Exploration of metastability and hidden phases in correlated electron crystals visualized by femtosecond optical doping and electron crystallography

被引：98

作者：

Han, Tzong-Ru T. ^{[1
]}

Zhou, Faran ^{[1
]}

Malliakas, Christos D. ^{[2
,3
]}

Duxbury, Phillip M. ^{[1
]}

Mahanti, Subhendra D. ^{[1
]}

Kanatzidis, Mercouri G. ^{[2
,3
]}

Ruan, Chong-Yu ^{[1
]}

机构：

[1] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA

[2] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[3] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

SCIENCE ADVANCES | 2015年 / 1卷 / 05期

关键词：

DENSITY-WAVE STRUCTURE; INDUCED SUPERCONDUCTIVITY; COMMENSURATE PHASE; X-RAY; TRANSITION; 1T-TAS2; TRANSFORMATIONS; MICROSCOPY; STATE; TAS2;

D O I：

10.1126/sciadv.1400173

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：

Characterizing and understanding the emergence of multiple macroscopically ordered electronic phases through subtle tuning of temperature, pressure, and chemical doping has been a long-standing central issue for complex materials research. We report the first comprehensive studies of optical doping-induced emergence of stable phases and metastable hidden phases visualized in situ by femtosecond electron crystallography. The electronic phase transitions are triggered by femtosecond infrared pulses, and a temperature-optical density phase diagram is constructed and substantiated with the dynamics of metastable states, highlighting the cooperation and competition through which the macroscopic quantum orders emerge. These results elucidate key pathways of femtosecond electronic switching phenomena and provide an important new avenue to comprehensively investigate optical doping-induced transition states and phase diagrams of complex materials with wide-ranging applications.

引用

页数：10

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