Doublon bottleneck in the ultrafast relaxation dynamics of hot electrons in 1T-TaS2

被引：8

作者：

Avigo, I ^{[1
]}

Queisser, F. ^{[1
,2
,3
]}

Zhou, P. ^{[1
]}

Ligges, M. ^{[1
,7
]}

Rossnagel, K. ^{[4
,5
,6
]}

Schuetzhold, R. ^{[1
,2
,3
]}

Bovensiepen, U. ^{[1
]}

机构：

[1] Univ Duisburg Essen, Fak Phys, Lotharstr 1, D-47057 Duisburg, Germany

[2] Helmholtz Zentrum Dresden Rossendorf, Bautzner Landstr 400, D-01328 Dresden, Germany

[3] Tech Univ Dresden, Inst Theoret Phys, D-01062 Dresden, Germany

[4] Christian Albrechts Univ Kiel, Inst Expt & Angew Phys, D-24098 Kiel, Germany

[5] Christian Albrechts Univ Kiel, Ruprecht Haensel Lab, D-24098 Kiel, Germany

[6] DESY, D-22607 Hamburg, Germany

[7] Fraunhofer IMS, D-47057 Duisburg, Germany

来源：

PHYSICAL REVIEW RESEARCH | 2020年 / 2卷 / 02期

关键词：

METALS; ATOMS; STATE;

D O I：

10.1103/PhysRevResearch.2.022046

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Employing time-resolved photoelectron spectroscopy we analyze the relaxation dynamics of hot electrons in the charge density wave/Mott material 1T-TaS2. At 1.2 eV above the Fermi level we observe a hot electron lifetime of 12 +/- 5 fs in the metallic state and of 60 +/- 10 fs in the broken symmetry ground state-a direct consequence of the reduced phase space for electron-electron scattering determined by the Mott gap. Boltzmann equation calculations which account for the interaction of hot electrons in a Bloch band with a doublon-holon excitation in the Mott state provide insight into the unoccupied electronic structure in the correlated state.

引用

页数：6

共 48 条

[1] Nonequilibrium dynamical mean-field theory and its applications
Aoki, Hideo
Tsuji, Naoto
Eckstein, Martin
Kollar, Marcus
Oka, Takashi
Werner, Philipp
[J]. REVIEWS OF MODERN PHYSICS, 2014, 86 (02) : 779 - 837
[2] Excitation and Relaxation Dynamics of the Photo-Perturbed Correlated Electron System 1T-TaS2
Avigo, Isabella
Zhou, Ping
Kallaene, Matthias
Rossnagel, Kai
Bovensiepen, Uwe
Ligges, Manuel
[J]. APPLIED SCIENCES-BASEL, 2019, 9 (01):
[3] Basov DN, 2017, NAT MATER, V16, P1077, DOI [10.1038/NMAT5017, 10.1038/nmat5017]
[4] Hot electron lifetimes in metals probed by time-resolved two-photon photoemission
Bauer, M.
Marienfeld, A.
Aeschlimann, M.
[J]. PROGRESS IN SURFACE SCIENCE, 2015, 90 (03) : 319 - 376
[5] Linewidths in energy-resolved two-photon photoemission spectroscopy
Boger, K
Roth, M
Weinelt, M
Fauster, T
Reinhard, PG
[J]. PHYSICAL REVIEW B, 2002, 65 (07): : 1 - 8
[6] Bovensiepen U., 2012, Dynamics at Solid state surfaces and interfaces. Ed. by, V1
[7] Electronic excitations in metals and at metal surfaces
Chulkov, E. V.
Borisov, A. G.
Gauyacq, J. P.
Sanchez-Portal, D.
Silkin, V. M.
Zhukov, V. P.
Echenique, P. M.
[J]. CHEMICAL REVIEWS, 2006, 106 (10) : 4160 - 4206
[8] Cui XF, 2014, NAT PHYS, V10, P505, DOI [10.1038/NPHYS2981, 10.1038/nphys2981]
[9] Femtosecond snapshots of gap-forming charge-density-wave correlations in quasi-two-dimensional dichalcogenides 1T-TaS2 and 2H-TaSe2 -: art. no. 041101
Demsar, J
Forró, L
Berger, H
Mihailovic, D
[J]. PHYSICAL REVIEW B, 2002, 66 (04): : 411011 - 411014
[10] Thermalization after an Interaction Quench in the Hubbard Model
Eckstein, Martin
Kollar, Marcus
Werner, Philipp
[J]. PHYSICAL REVIEW LETTERS, 2009, 103 (05)

← 1 2 3 4 5 →