Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session VV01: V: Poster Session III (7:00am-8:00am, PST)
7:00 AM,
Wednesday, March 22, 2023
Room: Virtual Room 1
Abstract: VV01.00021 : Thermal Signature of Majorana Fermion in a Josephson Junction*
Presenter:
Aabir Mukhopadhyay
(IISER Kolkata)
Authors:
Aabir Mukhopadhyay
(IISER Kolkata)
Sourin Das
(IISER Kolkata)
(i) The ratios between the various multiterminal thermal conductances are independent of the Josephson phase bias.
(ii) The ratios of ‘ratios of the phase derivative of multiterminal thermal conductance and the corresponding Josephson current’ are also independent of the Josephson phase bias.
These results owe their existence to the fact that the hybridization of an odd number of Majoranas always leaves a zero mode in the subgap spectrum of the junction. We establish that these results are unique to the presence of Majorana fermions and cannot be mimicked in a Josephson junction setup composed of a 1D topological superconductor hosting “Andreev type end states”(2).
We have recently extended our work to the thermoelectric conductance of a JJ. We have shown that a finite length JJ can induce a finite thermal-bias-induced charge current across the junction without breaking explicit particle-hole symmetry, even in the presence of disorder averaging(3).
Ref: (1) Phys. Rev. B 103, 144502
(2) Phys. Rev. B 100, 220502(R)
(3) Phys. Rev. B 106, 075421
*Ministry of Education of India
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