Ultrafast Switching to a Stable Hidden Quantum State in an Electronic Crystal

被引：563

作者：

Stojchevska, L. ^{[1
,2
]}

Vaskivskyi, I. ^{[1
]}

Mertelj, T. ^{[1
]}

Kusar, P. ^{[1
]}

Svetin, D. ^{[1
]}

Brazovskii, S. ^{[3
,4
]}

Mihailovic, D. ^{[1
,2
,5
]}

机构：

[1] Jozef Stefan Inst, Dept Complex Matter, Jamova 39, SI-1000 Ljubljana, Slovenia

[2] Jozef Stefan Int Postgrad Sch, SI-1000 Ljubljana, Slovenia

[3] Univ Paris Sud, LPTMS, CNRS, UMR8626, F-91405 Orsay, France

[4] Int Inst Phys, BR-59078400 Natal, RN, Brazil

[5] CENN Nanoctr, SI-1000 Ljubljana, Slovenia

来源：

SCIENCE | 2014年 / 344卷 / 6180期

基金：

欧洲研究理事会;

关键词：

INDUCED SUPERCONDUCTIVITY; DENSITY; TRANSITIONS; MICROSCOPY;

D O I：

10.1126/science.1241591

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：

Hidden states of matter may be created if a system out of equilibrium follows a trajectory to a state that is inaccessible or does not exist under normal equilibrium conditions. We found such a hidden (H) electronic state in a layered dichalcogenide crystal of 1T-TaS2 (the trigonal phase of tantalum disulfide) reached as a result of a quench caused by a single 35-femtosecond laser pulse. In comparison to other states of the system, the H state exhibits a large drop of electrical resistance, strongly modified single-particle and collective-mode spectra, and a marked change of optical reflectivity. The H state is stable until a laser pulse, electrical current, or thermal erase procedure is applied, causing it to revert to the thermodynamic ground state.

引用

收藏

页码：177 / 180

页数：4

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