Ultrafast Carrier Dynamics in an Organic Superconductorκ-(BEDT-TTF)2Cu[N(CN)2]Br by Spectrally Resolved Pump-Probe Spectroscopy

被引：2

作者：

Tsuchiya, Satoshi ^{[1
]}

Mertelj, Tomaz ^{[2
]}

Mihailovic, Dragan ^{[2
]}

Yamada, Jun-ichi ^{[3
]}

Toda, Yasunori ^{[1
]}

机构：

[1] Hokkaido Univ, Dept Appl Phys, Sapporo, Hokkaido 0608628, Japan

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

[3] Univ Hyogo, Grad Sch Mat Sci, Kobe, Hyogo 650004, Japan

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2020年 / 33卷 / 08期

关键词：

Organic superconductor; Time-resolved spectroscopy; Supercontinuum pulse; SUPERCONDUCTIVITY; TRANSITION; CONDUCTIVITY; TEMPERATURE;

D O I：

10.1007/s10948-019-05382-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this work, spectrally resolved optical pump-probe measurements were carried out on strongly correlated organic superconductor.-(BEDT-TTF)2Cu[N(CN)2]Br. We find two different types of carrier relaxation dynamics, one of which appears at 1.82 eV and 1.94 eV, and another at 2.17 eV. The former is characterized by short decay time similar to 1-2 ps and appears below similar to 60 K. From the comparison with the previous studies, the dynamics arises from the photo-induced pseudogap (PG) formation of the partially appeared Mott phase. The latter has long relaxation time similar to 9 ps at 5 K and developed as temperature decreases below 30 K. The slow dynamics is consistent with appearance of superconducting (SC) gap. Such separate observation of PG and SC dynamics enables us to proceed further investigation of a relationship between them.

引用

页码：2299 / 2303

页数：5

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