Detecting Spin Heat Accumulation by Sign Reversion of Thermopower in a Quantum Dot Side-Coupled to Majorana Bound States

2021 ◽  
Author(s):  
Lian-Liang Sun ◽  
Feng Chi
Keyword(s):  
Quantum Dot ◽  
Bound States ◽  
Heat Accumulation ◽  
Majorana Bound States ◽  
Spin Heat Accumulation

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.

Odd–Even Effect of the Persistent Current in a Quantum Dot Ring with Embedded Majorana Bound States

2015 ◽  
Vol 84 (2) ◽  
pp. 024707 ◽  
Author(s):  
Wei-Jiang Gong ◽  
Ying Zhao ◽  
Zhen Gao ◽  
Guangyu Yi ◽  
Xin Zhang
Keyword(s):  
Quantum Dot ◽  
Bound States ◽  
Persistent Current ◽  
Majorana Bound States

scholarly journals Photon-Assisted Transport Through a Quantum Dot Side-Coupled to Majorana Bound States

2020 ◽  
Vol 8 ◽  
Author(s):  
Feng Chi ◽  
Tian-Yu He ◽  
Jing Wang ◽  
Zhen-Guo Fu ◽  
Li-Ming Liu ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Bound States ◽  
Majorana Bound States

Large enhancement of thermoelectric effect by Majorana bound states coupled to a quantum dot

2020 ◽  
Vol 127 (12) ◽  
pp. 124302 ◽  
Author(s):  
Lan Hong ◽  
Feng Chi ◽  
Zhen-Guo Fu ◽  
Yue-Fei Hou ◽  
Zhigang Wang ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Bound States ◽  
Thermoelectric Effect ◽  
Majorana Bound States ◽  
Large Enhancement

scholarly journals Majorana bound states in a disordered quantum dot chain

2016 ◽  
Vol 18 (4) ◽  
pp. 043033 ◽  
Author(s):  
P Zhang ◽  
Franco Nori
Keyword(s):  
Quantum Dot ◽  
Bound States ◽  
Majorana Bound States

Tunable transport through a quantum dot chain with side-coupled Majorana bound states

2014 ◽  
Vol 116 (10) ◽  
pp. 103704 ◽  
Author(s):  
Cui Jiang ◽  
Gang Lu ◽  
Wei-Jiang Gong
Keyword(s):  
Quantum Dot ◽  
Bound States ◽  
Majorana Bound States

Shot noise in a quantum dot system coupled with Majorana bound states

2014 ◽  
Vol 26 (31) ◽  
pp. 315011 ◽  
Author(s):  
Qiao Chen ◽  
Ke-Qiu Chen ◽  
Hong-Kang Zhao
Keyword(s):  
Quantum Dot ◽  
Shot Noise ◽  
Bound States ◽  
Majorana Bound States

scholarly journals Dual Negative Differential of Heat Generation in a Strongly Correlated Quantum Dot Side-Coupled to Majorana Bound States

2021 ◽  
Vol 9 ◽  
Author(s):  
Zhu-Hua Wang ◽  
Wen-Cheng Huang
Keyword(s):  
Quantum Dot ◽  
Heat Generation ◽  
Coulomb Blockade ◽  
Bound States ◽  
Interaction Strength ◽  
Local Heat ◽  
Transport Processes ◽  
Strongly Correlated ◽  
Majorana Bound States ◽  
Coulomb Blockade Regime

We study theoretically the properties of local heat originated from energy exchange between electrons passing through a quantum dot (QD) coupled to a phonon bath. The dot is sandwiched between two normal metal leads and also side-coupled to Majorana bound states (MBSs) formed at opposite ends of a topological superconductor nanowire. We find that in addition to the negative differential of heat generation (NDHG) in the Coulomb blockade regime, another NDHG emerges near the leads’ Fermi level due to the dot-MBS coupling. This dual NDHG effect is robust against the variation of intradot Coulomb interaction strength, and disappears if the QD is coupled to regular Fermions. Direct hybridization between the MBSs reduces their impacts on the electronic transport processes, and eliminates the dual NDHG effect. Our results show that the dual NDHG effect is quite efficient for inferring the existence of MBSs, and may remedy some limitations of the detection schemes relying on tunneling spectroscopy technique.

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