Coulomb Blockade of a Nearly Open Majorana Island

TY - JOUR

T1 - Coulomb Blockade of a Nearly Open Majorana Island

AU - Pikulin, Dmitry

AU - Flensberg, Karsten

AU - Glazman, Leonid I.

AU - Houzet, Manuel

AU - Lutchyn, Roman M.

N1 - [Qdev]

PY - 2019/1/3

Y1 - 2019/1/3

N2 - We consider the ground-state energy and the spectrum of the low-energy excitations of a Majorana island formed of topological superconductors connected by a single-mode junction of arbitrary transmission. Coulomb blockade results in e-periodic modulation of the energies with the gate-induced charge. We find the amplitude of modulation as a function of reflection coefficient R. The amplitude scales as R in the limit R→0. At larger R, the dependence of the amplitude on the Josephson and charging energies is similar to that of a conventional-superconductor Cooper-pair box. The crossover value of R is small and depends on the ratio of the charging energy to superconducting gap.

AB - We consider the ground-state energy and the spectrum of the low-energy excitations of a Majorana island formed of topological superconductors connected by a single-mode junction of arbitrary transmission. Coulomb blockade results in e-periodic modulation of the energies with the gate-induced charge. We find the amplitude of modulation as a function of reflection coefficient R. The amplitude scales as R in the limit R→0. At larger R, the dependence of the amplitude on the Josephson and charging energies is similar to that of a conventional-superconductor Cooper-pair box. The crossover value of R is small and depends on the ratio of the charging energy to superconducting gap.

UR - http://www.scopus.com/inward/record.url?scp=85059815846&partnerID=8YFLogxK

U2 - 10.1103/physrevlett.122.016801

DO - 10.1103/physrevlett.122.016801

M3 - Journal article

C2 - 31012695

AN - SCOPUS:85059815846

SN - 0031-9007

VL - 122

JO - Physical Review Letters

JF - Physical Review Letters

IS - 1

M1 - 016801

ER -