High-resolution temperature-dependent valence-band photoemission spectroscopy of gold:mNature of electron-phonon coupling

1997 ◽  
Vol 55 (9) ◽  
pp. 5574-5577 ◽  
Author(s):  
T. Yokoya ◽  
A. Chainani ◽  
T. Takahashi
Keyword(s):  
High Resolution ◽  
Valence Band ◽  
Photoemission Spectroscopy ◽  
Phonon Coupling ◽  
Temperature Dependent ◽  
Electron Phonon Coupling

TEMPERATURE-DEPENDENT HIGH-RESOLUTION PHOTOEMISSION SPECTROSCOPY OF YbXCu4 (X=In, Cd, Mg)

2002 ◽  
Vol 09 (02) ◽  
pp. 1079-1083 ◽  
Author(s):  
H. SATO ◽  
Y. NISHIKAWA ◽  
F. NAGASAKI ◽  
H. FUJINO ◽  
Y. TAKEDA ◽  
...  
Keyword(s):  
High Resolution ◽  
Valence Band ◽  
Energy Resolution ◽  
High Energy ◽  
The Other ◽  
High Energy Resolution ◽  
Photoemission Spectroscopy ◽  
Temperature Dependent ◽  
Other Hand ◽  
Increasing Temperature

Valence-band and Yb 4d photoemission spectra of YbXCu 4 (X=In, Cd, Mg) have been measured with high energy resolution from 10 to 300 K. In the valence-band photoemission spectra of YbInCu 4 and YbCdCu 4, the structure due to the Yb 2+ 4f 7/2 states is clearly observed near the Fermi level (E F ) at 10 K. The intensity of the Yb 2+ 4f 7/2 structure decreases with increasing temperature and the structure almost disappears at 300 K. The amount of the enhancement from 50 to 107 K is much stronger for YbInCu 4 than for YbCdCu 4. On the other hand, the Yb 2+ 4f 7/2 structure of YbMgCu 4 is observed as a broad peak near E F and the spectra show little temperature dependence. In the Yb 4d photoemission spectra of YbInCu 4 and YbCdCu 4, the structures due to the Yb 2+ and Yb 3+ states are recognized. The intensity ratio Yb 2+/ Yb 3+ increases with decreasing temperature. In the Yb 4d spectra of YbMgCu 4, on the other hand, almost only structures due to Yb 2+ states are observed.

scholarly journals Evidence for superconductivity in Li-decorated monolayer graphene

2015 ◽  
Vol 112 (38) ◽  
pp. 11795-11799 ◽  
Author(s):  
B. M. Ludbrook ◽  
G. Levy ◽  
P. Nigge ◽  
M. Zonno ◽  
M. Schneider ◽  
...  
Keyword(s):  
Low Temperature ◽  
Photoemission Spectroscopy ◽  
Monolayer Graphene ◽  
Phonon Density ◽  
Phonon Density Of States ◽  
Phonon Coupling ◽  
Temperature Dependent ◽  
Angle Resolved Photoemission Spectroscopy ◽  
Electron Phonon Coupling ◽  
First Time

Monolayer graphene exhibits many spectacular electronic properties, with superconductivity being arguably the most notable exception. It was theoretically proposed that superconductivity might be induced by enhancing the electron–phonon coupling through the decoration of graphene with an alkali adatom superlattice [Profeta G, Calandra M, Mauri F (2012) Nat Phys 8(2):131–134]. Although experiments have shown an adatom-induced enhancement of the electron–phonon coupling, superconductivity has never been observed. Using angle-resolved photoemission spectroscopy (ARPES), we show that lithium deposited on graphene at low temperature strongly modifies the phonon density of states, leading to an enhancement of the electron–phonon coupling of up to λ≃0.58. On part of the graphene-derived π∗-band Fermi surface, we then observe the opening of a Δ≃0.9-meV temperature-dependent pairing gap. This result suggests for the first time, to our knowledge, that Li-decorated monolayer graphene is indeed superconducting, with Tc≃5.9 K.

Temperature dependent electron–phonon coupling of Au resolved via lattice dynamics measured with sub-picosecond infrared pulses

2021 ◽  
Vol 129 (19) ◽  
pp. 193104
Author(s):  
John A. Tomko ◽  
Sushant Kumar ◽  
Ravishankar Sundararaman ◽  
Patrick E. Hopkins
Keyword(s):  
Lattice Dynamics ◽  
Phonon Coupling ◽  
Temperature Dependent ◽  
Electron Phonon Coupling

scholarly journals Temperature-dependent electron-phonon coupling in La2−xSrxCuO4probed by femtosecond x-ray diffraction

2013 ◽  
Vol 88 (5) ◽  
Author(s):  
B. Mansart ◽  
M. J. G. Cottet ◽  
G. F. Mancini ◽  
T. Jarlborg ◽  
S. B. Dugdale ◽  
...  
Keyword(s):  
Phonon Coupling ◽  
X Ray Diffraction ◽  
Temperature Dependent ◽  
X Ray ◽  
Electron Phonon Coupling

scholarly journals Dirac semimetal PdTe2 temperature-dependent quasiparticle dynamics and electron–phonon coupling

2021 ◽  
pp. 104816
Author(s):  
Shu-Yu Liu ◽  
Shuang-Xing Zhu ◽  
Qi-Yi Wu ◽  
Chen Zhang ◽  
Peng-Bo Song ◽  
...  
Keyword(s):  
Phonon Coupling ◽  
Temperature Dependent ◽  
Dirac Semimetal ◽  
Electron Phonon Coupling ◽  
Quasiparticle Dynamics
Sign in / Sign up

Export Citation Format

Share Document