Flat-band transport and Josephson effect through a finite-size sawtooth lattice

Ville A.J. Pyykkönen; Sebastiano Peotta; Philipp Fabritius; Jeffrey Mohan; Tilman Esslinger; Päivi Törmä

doi:10.1103/PhysRevB.103.144519

Flat-band transport and Josephson effect through a finite-size sawtooth lattice

Ville A.J. Pyykkönen
, Sebastiano Peotta
, Philipp Fabritius
, Jeffrey Mohan
, Tilman Esslinger
, Päivi Törmä^*

^*Tämän työn vastaava kirjoittaja

Tampere University
Swiss Federal Institute of Technology
University of Helsinki

Tutkimustuotos: Lehtiartikkeli › Article › Scientific › vertaisarvioitu

20 Sitaatiot (Scopus)

266 Lataukset (Pure)

Abstrakti

We study theoretically the transport through a finite-size sawtooth lattice coupled to two fermionic reservoirs kept in the superfluid state. We focus on the DC Josephson effect and find that the flat-band states of the sawtooth lattice can support larger critical current and a higher temperature than the dispersive band states. However, for this to occur the boundary states of the finite-size lattice need to be tuned at resonance with the bulk flat-band states by means of additional boundary potentials. We show that transport in a two-terminal configuration can reveal the salient features of the geometric contribution of flat-band superconductivity, namely the linear dependence of key quantities, such as the critical current and critical temperature, on the interaction. Our results are based on parameters of a realistic experimental lattice potential, and we discuss the conditions one needs to reach to observe the predicted effects experimentally.

Alkuperäiskieli	Englanti
Artikkeli	144519
Sivut	1-12
Sivumäärä	12
Julkaisu	Physical Review B
Vuosikerta	103
Numero	14
DOI - pysyväislinkit	https://doi.org/10.1103/PhysRevB.103.144519
Tila	Julkaistu - 28 huhtik. 2021
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Rahoitus

We acknowledge stimulating discussions with Laura Corman, Samuel Häusler, and Martin Lebrat. V.A.J.P., S.P., and P.T. acknowledge support by the Academy of Finland under Projects No. 330384, No. 303351, No. 307419, No. 327293, No. 318987 (QuantERA project RouTe), No. 318937 (PROFI), and by Centre for Quantum Engineering (CQE) at Aalto University. V.A.J.P. acknowledges financial support by the Jenny and Antti Wihuri Foundation. T.E., P.F., and J.M. acknowledge the Swiss National Science Foundation (Grants No. 182650 and No. NCCR-QSIT) and European Research Council advanced grant TransQ (Grant No. 742579) for funding.

Pääsy asiakirjaan

10.1103/PhysRevB.103.144519

Flat-band transport and Josephson effect.PhysRevB.103.144519Final published version, 847 KB

Muut tiedostot ja linkit

Linkki julkaisuun Scopuksessa

5 Päättynyt

Peotta Sebastiano AT-kulut
Peotta, S. (Vastuullinen johtaja), Swaminathan, K. (Projektin jäsen), Korkalainen, T. (Projektin jäsen), Müftüoglu, M. (Projektin jäsen), Linho, V. (Projektin jäsen), Kanz, A. (Projektin jäsen), Tadros, P. (Projektin jäsen), Teeriaho, M. (Projektin jäsen) & Pham Nguyen, M. (Projektin jäsen)
01/09/2020 → 31/08/2023
Projekti: RCF Academy Research Fellow: Research costs
Pitkän kantaman koherenssi nanosysteemeissä
Törmä, P. (Vastuullinen johtaja), Topp, G. (Projektin jäsen), Pyykkönen, V. (Projektin jäsen), Kähärä, J. (Projektin jäsen), Moilanen, A. (Projektin jäsen), Kumar, P. (Projektin jäsen), Julku, A. (Projektin jäsen), Salerno, G. (Projektin jäsen), Luntama, S. (Projektin jäsen), Kliuiev, P. (Projektin jäsen), Rosenberg, M. (Projektin jäsen), Kuoppala, S. (Projektin jäsen), Lamponen, E. (Projektin jäsen), Aronen, K. (Projektin jäsen), Systä, H. (Projektin jäsen), Källman, N. (Projektin jäsen) & Arjas, K. (Projektin jäsen)
01/01/2020 → 31/12/2021
Projekti: Academy of Finland: Other research funding
Kohti huoneenlämpötilan kvanttiteknologioita
Törmä, P. (Vastuullinen johtaja), Moilanen, A. (Projektin jäsen), Daskalakis, K. (Projektin jäsen), Cotrufo, A. (Projektin jäsen), Kliuiev, P. (Projektin jäsen), Kumar, P. (Projektin jäsen), Heilmann, R. (Projektin jäsen) & Guo, R. (Projektin jäsen)
01/03/2018 → 28/02/2021
Projekti: Academy of Finland: Other research funding

Science-IT
Hakala, M. (Manager)
Perustieteiden korkeakoulu
Laitteistot/tilat: Facility

Quantum metric and superfluidity
Peotta, S. (Puhuja)
9 syysk. 2022
Aktiviteetti: Kutsuttu akateeminen esitelmä

Tiedosto

Siteeraa tätä

@article{01f35b9536504e87903b2404444596da,

title = "Flat-band transport and Josephson effect through a finite-size sawtooth lattice",

abstract = "We study theoretically the transport through a finite-size sawtooth lattice coupled to two fermionic reservoirs kept in the superfluid state. We focus on the DC Josephson effect and find that the flat-band states of the sawtooth lattice can support larger critical current and a higher temperature than the dispersive band states. However, for this to occur the boundary states of the finite-size lattice need to be tuned at resonance with the bulk flat-band states by means of additional boundary potentials. We show that transport in a two-terminal configuration can reveal the salient features of the geometric contribution of flat-band superconductivity, namely the linear dependence of key quantities, such as the critical current and critical temperature, on the interaction. Our results are based on parameters of a realistic experimental lattice potential, and we discuss the conditions one needs to reach to observe the predicted effects experimentally.",

author = "Pyykk{\"o}nen, \{Ville A.J.\} and Sebastiano Peotta and Philipp Fabritius and Jeffrey Mohan and Tilman Esslinger and P{\"a}ivi T{\"o}rm{\"a}",

note = "| openaire: EC/H2020/742579/EU//TransQ ",

year = "2021",

month = apr,

day = "28",

doi = "10.1103/PhysRevB.103.144519",

language = "English",

volume = "103",

pages = "1--12",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Physical Society",

number = "14",

}

TY - JOUR

T1 - Flat-band transport and Josephson effect through a finite-size sawtooth lattice

AU - Pyykkönen, Ville A.J.

AU - Peotta, Sebastiano

AU - Fabritius, Philipp

AU - Mohan, Jeffrey

AU - Esslinger, Tilman

AU - Törmä, Päivi

N1 - | openaire: EC/H2020/742579/EU//TransQ

PY - 2021/4/28

Y1 - 2021/4/28

N2 - We study theoretically the transport through a finite-size sawtooth lattice coupled to two fermionic reservoirs kept in the superfluid state. We focus on the DC Josephson effect and find that the flat-band states of the sawtooth lattice can support larger critical current and a higher temperature than the dispersive band states. However, for this to occur the boundary states of the finite-size lattice need to be tuned at resonance with the bulk flat-band states by means of additional boundary potentials. We show that transport in a two-terminal configuration can reveal the salient features of the geometric contribution of flat-band superconductivity, namely the linear dependence of key quantities, such as the critical current and critical temperature, on the interaction. Our results are based on parameters of a realistic experimental lattice potential, and we discuss the conditions one needs to reach to observe the predicted effects experimentally.

AB - We study theoretically the transport through a finite-size sawtooth lattice coupled to two fermionic reservoirs kept in the superfluid state. We focus on the DC Josephson effect and find that the flat-band states of the sawtooth lattice can support larger critical current and a higher temperature than the dispersive band states. However, for this to occur the boundary states of the finite-size lattice need to be tuned at resonance with the bulk flat-band states by means of additional boundary potentials. We show that transport in a two-terminal configuration can reveal the salient features of the geometric contribution of flat-band superconductivity, namely the linear dependence of key quantities, such as the critical current and critical temperature, on the interaction. Our results are based on parameters of a realistic experimental lattice potential, and we discuss the conditions one needs to reach to observe the predicted effects experimentally.

UR - https://www.scopus.com/pages/publications/85105495332

U2 - 10.1103/PhysRevB.103.144519

DO - 10.1103/PhysRevB.103.144519

M3 - Article

AN - SCOPUS:85105495332

SN - 2469-9950

VL - 103

SP - 1

EP - 12

JO - Physical Review B

JF - Physical Review B

IS - 14

M1 - 144519

ER -

Flat-band transport and Josephson effect through a finite-size sawtooth lattice

Abstrakti

Rahoitus

Pääsy asiakirjaan

Muut tiedostot ja linkit

Sormenjälki

Projektit

Peotta Sebastiano AT-kulut

Pitkän kantaman koherenssi nanosysteemeissä

Kohti huoneenlämpötilan kvanttiteknologioita

Laitteet

Science-IT

Aktiviteetit

Quantum metric and superfluidity

Siteeraa tätä