1T_TaS2_Nature_Mat_accepted.pdf (2.75 MB)

From Mott state to superconductivity in-1T-TaS

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journal contribution
posted on 15.07.2013, 13:38 by B. Sipos, Anna Kusmartseva, Ana Akrap, H. Berger, Laszlo Forro, E. Tutis
The search for the coexistence between superconductivity and other collective electronic states in many instances promoted the discovery of novel states of matter. The manner in which the different types of electronic order combine remains an ongoing puzzle. 1T-TaS is a layered material, and the only transition-metal dichalcogenide (TMD) known to develop the Mott phase. Here, we show the appearance of a series of low-temperature electronic states in 1T-TaS with pressure: the Mott phase melts into a textured charge-density wave (CDW); superconductivity develops within the CDW state, and survives to very high pressures, insensitive to subsequent disappearance of the CDW state and, surprisingly, also the strong changes in the normal state. This is also the first reported case of superconductivity in a pristine 1T-TMD compound. We demonstrate that superconductivity first develops within the state marked by a commensurability-driven, Coulombically frustrated, electronic phase separation.

History

School

  • Science

Department

  • Physics

Citation

SIPOS, B. ... et al, 2008. From Mott state to superconductivity in-1T-TaS. Nature Materials, 7 (12), pp.960-965.

Publisher

Nature Publishing Group

Version

AM (Accepted Manuscript)

Publication date

2008

ISSN

1476-1122

eISSN

1476-4660

Language

en

Exports

Loughborough Publications

Keywords

Exports