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One of the simplest proposed experimental probes of a Majorana bound-state is a quantized (2e^2/h) value of zero-bias tunneling conductance. When temperature is somewhat larger than the intrinsic width of the Majorana peak, conductance is…

介观与纳米尺度物理 · 物理学 2015-06-05 Jie Liu , Andrew C. Potter , K. T. Law , Patrick A. Lee

Majorana bound states in topological superconductors have been predicted to appear in the form of zero-bias conductance peaks of height $2e^{2}/h$, which represents one of the most studied signatures so far. Here, we show that quasi…

介观与纳米尺度物理 · 物理学 2021-10-11 Jorge Cayao , Pablo Burset

Majorana zero modes can appear at the wire ends of a 1D topological superconductor and manifest themselves as a quantized zero-bias conductance peak in the tunneling spectroscopy of normal-superconductor junctions. However, in…

介观与纳米尺度物理 · 物理学 2021-06-09 Haining Pan , Chun-Xiao Liu , Michael Wimmer , Sankar Das Sarma

Majorana bound states (MBS) at the end of nanowires have been proposed as one of the most important candidate for the topological qubits. However, similar tunneling conductance features for both the MBS and Andreev bound states (ABS) have…

介观与纳米尺度物理 · 物理学 2024-12-10 Dibyajyoti Sahu , Vipin Khade , Suhas Gangadharaiah

Rashba spin-orbit coupled semiconductor-superconductor hybrid structures in the presence of Zeeman splitting have emerged as the first experimentally realizable topological superconductor supporting zero-energy Majorana bound states.…

超导电性 · 物理学 2013-03-29 Dibyendu Roy , C. J. Bolech , Nayana Shah

We show that a topologically trivial zero bias conductance peak (of height 4e^2/h) is produced in semiconductor-superconductor hybrid nanowires due to a suppressed pair potential and/or an excess Zeeman field at the ends of the…

超导电性 · 物理学 2015-06-15 Dibyendu Roy , Nilanjan Bondyopadhaya , Sumanta Tewari

Trivial Andreev bound states arising from chemical potential variations could lead to zero-bias tunneling conductance peaks at finite magnetic fields in class $D$ nanowires, precisely mimicking the predicted zero-bias conductance peaks…

介观与纳米尺度物理 · 物理学 2018-06-22 Chun-Xiao Liu , Jay D. Sau , S. Das Sarma

Most quantum point contacts (QPCs) fabricated in high-mobility 2D electron gases show a zero-bias conductance peak near pinchoff, but the origin of this peak remains a mystery. Previous experiments have primarily focused on the zero-bias…

介观与纳米尺度物理 · 物理学 2015-05-19 Y. Ren , W. W. Yu , S. M. Frolov , J. A. Folk , W. Wegscheider

We develop a theory for the three-terminal nonlocal conductance in Majorana nanowires as existing in the superconductor-semiconductor hybrid structures in the presence of superconducting proximity, spin-orbit coupling, and Zeeman splitting.…

介观与纳米尺度物理 · 物理学 2021-01-27 Haining Pan , Jay D. Sau , S. Das Sarma

By calculating the differential tunneling conductance spectra from the two ends of a Majorana nanowire with a quantum dot embedded at one end, we establish that a careful examination of the nonlocal correlations of the zero bias conductance…

超导电性 · 物理学 2019-07-08 Yi-Hua Lai , Jay D. Sau , Sankar Das Sarma

We show that the topologically trivial zero bias peak (ZBP) emerging in semiconductor Majorana wires due to soft confinement exhibits correlated splitting oscillations as a function of the applied Zeeman field, similar to the correlated…

介观与纳米尺度物理 · 物理学 2014-07-23 Tudor D. Stanescu , Sumanta Tewari

Spin-orbit coupled semiconducting nanowires with proximity-induced superconductivity are expected to host Majorana zero modes at their endpoints when a sufficiently strong magnetic field is applied. The resulting phase would be a…

介观与纳米尺度物理 · 物理学 2017-11-22 David J. Clarke

Recent tunneling spectroscopy experiments in semiconducting nanowires with proximity-induced superconductivity have reported robust zero-bias conductance peaks. Such a feature can be compatible with the existence of topological Majorana…

介观与纳米尺度物理 · 物理学 2018-08-29 Esben Bork Hansen , Jeroen Danon , Karsten Flensberg

Theoretical research suggests a emergence of the Majorana bound states at the ends of the nanowires. Experimental verifications of said concept has already been executed, e.g., in superconductor/semiconductor nanowire devices where…

介观与纳米尺度物理 · 物理学 2020-12-01 Aksel Kobiałka , Andrzej Ptok

Motivated by a recent experimental report[1] claiming the likely observation of the Majorana mode in a semiconductor-superconductor hybrid structure[2,3,4,5], we study theoretically the dependence of the zero bias conductance peak…

介观与纳米尺度物理 · 物理学 2013-01-09 Chien-Hung Lin , Jay D. Sau , S. Das Sarma

Majorana zero modes are quasiparticle states localized at the boundaries of topological superconductors that are expected to be ideal building blocks for fault-tolerant quantum computing. Several observations of zero-bias conductance peaks…

We study by means of the recursive Green's function technique the local density-of-states of (finite and semi-infinite) multi-band spin-orbit coupled semiconducting nanowires in proximity to an s-wave superconductor and attached to…

介观与纳米尺度物理 · 物理学 2015-03-19 Marco Gibertini , Fabio Taddei , Marco Polini , Rosario Fazio

We study time-resolved charge transport in a superconducting nanowire using time-dependent Landauer-B{\"u}ttiker theory. We find that the steady-state Majorana zero-bias conductance peak emerges transiently accompanied by characteristic…

介观与纳米尺度物理 · 物理学 2019-11-11 Riku Tuovinen , Enrico Perfetto , Robert van Leeuwen , Gianluca Stefanucci , Michael A. Sentef

Recently, electron transport along chiral molecules has been attracting extensive interest and several intriguing phenomena have been reported in recent experiments, such as the emergence of zero-bias conductance peaks upon the adsorption…

介观与纳米尺度物理 · 物理学 2023-10-18 Xiao-Feng Chen , Wenchen Luo , Tie-Feng Fang , Yossi Paltiel , Oded Millo , Ai-Min Guo , Qing-Feng Sun

Andreev bound states in hybrid superconductor-semiconductor devices can have near-zero energy in the topologically trivial regime as long as the confinement potential is sufficiently smooth. These quasi-Majorana states show zero-bias…

介观与纳米尺度物理 · 物理学 2019-11-13 A. Vuik , B. Nijholt , A. R. Akhmerov , M. Wimmer
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