scholarly journals Origin of the zero-bias conductance peaks observed ubiquitously in high-Tcsuperconductors

1998 ◽  
Vol 57 (2) ◽  
pp. 1266-1276 ◽  
Author(s):  
Chia-Ren Hu
Keyword(s):  
Zero Bias ◽  
Zero Bias Conductance

scholarly journals Anomalous Zero-Bias Conductance Peak in a Nb–InSb Nanowire–Nb Hybrid Device

Nano Letters ◽  
2012 ◽  
Vol 12 (12) ◽  
pp. 6414-6419 ◽  
Author(s):  
M. T. Deng ◽  
C. L. Yu ◽  
G. Y. Huang ◽  
M. Larsson ◽  
P. Caroff ◽  
...  
Keyword(s):  
Zero Bias ◽  
Hybrid Device ◽  
Conductance Peak ◽  
Zero Bias Conductance

scholarly journals Origin of bias-independent conductance plateaus and zero-bias conductance peaks in Bi2Se3/NbSe2 hybrid structures

2017 ◽  
Vol 96 (7) ◽  
Author(s):  
Hui Li ◽  
Tong Zhou ◽  
Jun He ◽  
Huan-Wen Wang ◽  
Huachen Zhang ◽  
...  
Keyword(s):  
Hybrid Structures ◽  
Zero Bias ◽  
Zero Bias Conductance

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.

Zero-bias conductance anomaly in graphene dots

2017 ◽  
Vol 56 (6S1) ◽  
pp. 06GE07 ◽  
Author(s):  
Yasushi Kanai ◽  
Mohamed Almokhtar ◽  
Takao Ono ◽  
Yasuhide Ohno ◽  
Kenzo Maehashi ◽  
...  
Keyword(s):  
Zero Bias ◽  
Zero Bias Conductance

MAXIMUM ELECTRICAL CONDUCTANCE OF A METALLIC PARABOLIC QUANTUM DOT VERSUS DOT-LEAD COUPLING

NANO ◽  
2011 ◽  
Vol 06 (06) ◽  
pp. 557-560
Author(s):  
M. A. GRADO-CAFFARO ◽  
M. GRADO-CAFFARO
Keyword(s):  
Quantum Dot ◽  
Electrical Conductance ◽  
The Other ◽  
Maximal Conductance ◽  
Zero Bias ◽  
Other Hand ◽  
Zero Bias Conductance ◽  
Metallic Wires ◽  
Maximum Conductance ◽  
Parabolic Quantum Dot

Starting from assuming that the electrical zero-bias conductance in a metallic quantum dot may be represented well by the Breit–Wigner model (which, on the other hand, is certainly appropriate for one-atom metallic wires), the strength of the coupling between a metallic parabolic quantum dot and the involved leads is determined for maximum conductance through the dot. In fact, this maximal conductance is calculated and issues related to off-resonant conduction states are discussed.

Electron Tunneling into Single Crystals of YBa2Cu3O7-δ

1989 ◽  
Vol 169 ◽  
Author(s):  
J. M. Valles ◽  
M. Gurvitch ◽  
M. Cucolo ◽  
R. C. Dynes ◽  
J. P. Garno ◽  
...  
Keyword(s):  
Critical Temperature ◽  
Single Crystals ◽  
Linear Dependence ◽  
Tunnel Junctions ◽  
Electron Tunneling ◽  
Additional Structure ◽  
Zero Bias ◽  
Zero Bias Conductance

AbstractWe have fabricated tunnel junctions between chemically etched single crystals of YBa2Cu3O7-δ and evaporated metal counterelectrodes which exhibit reproducible characteristics. Above the bulk critical temperature of YBa2Cu3O7-δ, Tc, the conductance, G(V), has a linear dependence with voltage and has some asymmetry. Below Tc, additional structure associated with the superconductivity appears in G(V). At T>>Tc there is a reproducible finite zero bias conductance.

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