scholarly journals Parity independence of the zero-bias conductance peak in a nanowire based topological superconductor-quantum dot hybrid device

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
M. T. Deng ◽  
C. L. Yu ◽  
G. Y. Huang ◽  
M. Larsson ◽  
P. Caroff ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Zero Bias ◽  
Topological Superconductor ◽  
Hybrid Device ◽  
Conductance Peak ◽  
Zero Bias Conductance

scholarly journals Topological isoconductance signatures in Majorana nanowires

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
L. S. Ricco ◽  
J. E. Sanches ◽  
Y. Marques ◽  
M. de Souza ◽  
M. S. Figueira ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Transport Properties ◽  
Spin Polarization ◽  
Bound States ◽  
Spin Asymmetry ◽  
Experimental Protocol ◽  
Zero Bias ◽  
Topological Superconductor ◽  
Hybrid Device ◽  
Majorana Bound States

AbstractWe consider transport properties of a hybrid device composed by a quantum dot placed between normal and superconducting reservoirs, and coupled to a Majorana nanowire: a topological superconducting segment hosting Majorana bound states (MBSs) at the opposite ends. It is demonstrated that if highly nonlocal and nonoverlapping MBSs are formed in the system, the zero-bias Andreev conductance through the dot exhibits characteristic isoconductance profiles with the shape depending on the spin asymmetry of the coupling between the dot and the topological superconductor. Otherwise, for overlapping MBSs with less degree of nonlocality, the conductance is insensitive to the spin polarization and the isoconductance signatures disappear. This allows to propose an alternative experimental protocol for probing the nonlocality of the MBSs in Majorana nanowires.

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 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.

scholarly journals Identifying the graphene d-wave superconducting symmetry by an anomalous splitting zero-bias conductance peak

2020 ◽  
Vol 22 (3) ◽  
pp. 033018 ◽  
Author(s):  
Chuan-Shuai Huang ◽  
Yang Yang ◽  
Y C Tao ◽  
Jun Wang
Keyword(s):  
Zero Bias ◽  
Conductance Peak ◽  
Zero Bias Conductance ◽  
Superconducting Symmetry ◽  
D Wave

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.

On the Origin of Zero-Bias Conductance Peak in High-Tc Superconductors

1998 ◽  
Vol 12 (29n31) ◽  
pp. 3027-3030
Author(s):  
Alexander B. Nazarenko ◽  
Ernst A. Pashitskii ◽  
Alexander E. Pashitskii
Keyword(s):  
Elastic Scattering ◽  
Order Parameter ◽  
Magnetic Impurities ◽  
High Tc Superconductors ◽  
Zero Bias ◽  
High Tc ◽  
Conductance Peak ◽  
Wave Symmetry ◽  
Zero Bias Conductance ◽  
D Wave

We show that the zero-bias conductance peak observed in tunnel and point junctions of cuprates can be a consequence of "unitary" elastic scattering of the carriers by non-magnetic impurities in the vicinity of the junction interface and d-wave symmetry of the order parameter.

scholarly journals Zero-bias conductance peak and Josephson effect in graphene-NbTiN junctions

2012 ◽  
Vol 85 (20) ◽  
Author(s):  
M. Popinciuc ◽  
V. E. Calado ◽  
X. L. Liu ◽  
A. R. Akhmerov ◽  
T. M. Klapwijk ◽  
...  
Keyword(s):  
Josephson Effect ◽  
Zero Bias ◽  
Conductance Peak ◽  
Zero Bias Conductance
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