Point-contact spectroscopy on antiferromagnetic Kondo semiconductors CeT 2Al10 (T = Ru and Os)

2020 ◽  
Vol 29 (7) ◽  
pp. 077103
Author(s):  
Jie Li ◽  
Li-Qiang Che ◽  
Tian Le ◽  
Jia-Hao Zhang ◽  
Pei-Jie Sun ◽  
...  
Keyword(s):  
Point Contact ◽  
Point Contact Spectroscopy

Point-contact spectroscopy of quasi-1D conductors with CDW

1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-179-Pr10-181
Author(s):  
A. A. Sinchenko ◽  
Yu. I. Latyshev ◽  
S. G. Zybtsev ◽  
I. G. Gorllova
Keyword(s):  
Point Contact ◽  
Point Contact Spectroscopy

Tunneling and point-contact spectroscopy on NbSe2

2000 ◽  
Vol 332 (1-4) ◽  
pp. 450-455 ◽  
Author(s):  
P Martı́nez-Samper ◽  
J.G Rodrigo ◽  
N Agraı̈t ◽  
R Grande ◽  
S Vieira
Keyword(s):  
Point Contact ◽  
Point Contact Spectroscopy

Point contact spectroscopy of intermediate valence compounds

1982 ◽  
Vol 53 (11) ◽  
pp. 7887-7889 ◽  
Author(s):  
I. Frankowski ◽  
P. Wachter
Keyword(s):  
Point Contact ◽  
Intermediate Valence ◽  
Point Contact Spectroscopy

scholarly journals Itinerant Antiferro- and Ferro-Magnetic Instability in Re-Doped URu 2 Si 2 : Optical and Point-Contact Spectroscopy Results

1995 ◽  
Vol 32 (9) ◽  
pp. 783-783 ◽  
Author(s):  
St Thieme ◽  
P Steiner ◽  
L Degiorgi ◽  
P Wachter ◽  
Y Dalichaouch ◽  
...  
Keyword(s):  
Point Contact ◽  
Magnetic Instability ◽  
Point Contact Spectroscopy ◽  
Ferro Magnetic

scholarly journals Point contact spectroscopy of superconductors via nanometer scale point contacts formed by resistive switching

AIP Advances ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 125217 ◽  
Author(s):  
Mária Dvoranová ◽  
Tomáš Plecenik ◽  
Martin Moško ◽  
Marek Vidiš ◽  
Maroš Gregor ◽  
...  
Keyword(s):  
Resistive Switching ◽  
Point Contact ◽  
Nanometer Scale ◽  
Point Contacts ◽  
Point Contact Spectroscopy ◽  
Scale Point

scholarly journals POINT-CONTACT SPECTROSCOPY OF MAGNESIUM DIBORIDE WITH DIFFERENT COUNTER-ELECTRODES

2003 ◽  
Vol 17 (27n28) ◽  
pp. 1405-1416
Author(s):  
A. I. D'YACHENKO ◽  
V. YU. TARENKOV ◽  
M. A. BELOGOLOVSKII ◽  
V. N. VARYUKHIN ◽  
A. V. ABAL'OSHEV ◽  
...  
Keyword(s):  
Andreev Reflection ◽  
Magnesium Diboride ◽  
Three Dimensional ◽  
Point Contact ◽  
Band Model ◽  
Counter Electrodes ◽  
Break Junctions ◽  
Point Contact Spectroscopy ◽  
Dc Current ◽  
Two Band Model

We report on tunneling and Andreev-reflection conductance spectra of 39 K superconducting magnesium diboride, obtained with Pb and Au counter-electrodes. Two distinct steps at close to 2.7 and 7.1 meV appear in a low-resistance metallic-type Au–MgB 2 junction characteristic, whereas a tunneling-like spectrum measured for the same junction, annealed by the application of DC current, exhibits only a rounded contribution of the larger gap. Junctions with a superconducting lead counter-electrode pressed into a bulk MgB 2 sample reveal two conductance peaks that are interpreted as the result of the formation of a highly-transmitting break junctions inside the magnesium diboride ceramic. Our results strongly support the two-band model with two different gap values on quasi-two-dimensional σ (7.1 meV) and three-dimensional π (2.7 meV) Fermi surface sheets of MgB 2.

scholarly journals Theory of point contact spectroscopy in correlated materials

2015 ◽  
Vol 112 (3) ◽  
pp. 651-656 ◽  
Author(s):  
Wei-Cheng Lee ◽  
Wan Kyu Park ◽  
Hamood Z. Arham ◽  
Laura H. Greene ◽  
Philip Phillips
Keyword(s):  
Scattering Length ◽  
Point Contact ◽  
Microscopic Theory ◽  
Effective Density ◽  
Strongly Correlated ◽  
Metallic Electrode ◽  
Zero Bias ◽  
Point Contact Spectroscopy ◽  
Conductance Peak ◽  
Zero Bias Conductance

We developed a microscopic theory for the point-contact conductance between a metallic electrode and a strongly correlated material using the nonequilibrium Schwinger-Kadanoff-Baym-Keldysh formalism. We explicitly show that, in the classical limit, contact size shorter than the scattering length of the system, the microscopic model can be reduced to an effective model with transfer matrix elements that conserve in-plane momentum. We found that the conductance dI/dV is proportional to the effective density of states, that is, the integrated single-particle spectral function A(ω = eV) over the whole Brillouin zone. From this conclusion, we are able to establish the conditions under which a non-Fermi liquid metal exhibits a zero-bias peak in the conductance. This finding is discussed in the context of recent point-contact spectroscopy on the iron pnictides and chalcogenides, which has exhibited a zero-bias conductance peak.

Sign in / Sign up

Export Citation Format

Share Document