skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Evidence for anisotropic spin-triplet Andreev reflection at the 2D van der Waals ferromagnet/superconductor interface

Journal Article · · Nature Communications
 [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [3]; ORCiD logo [4];  [4];  [3]; ORCiD logo [4]; ORCiD logo [1]
  1. Peking Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  2. Wuhan Univ. of Technology (China)
  3. State Univ. of New York at Buffalo, NY (United States)
  4. Peking Univ., Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China); University of Chinese Academy of Sciences, Beijing (China); Beijing Academy of Quantum Information Sciences, Beijing (China)
+ Show Author Affiliations

Fundamental symmetry breaking and relativistic spin–orbit coupling give rise to fascinating phenomena in quantum materials. Of particular interest are the interfaces between ferromagnets and common s-wave superconductors, where the emergent spin-orbit fields support elusive spin-triplet superconductivity, crucial for superconducting spintronics and topologically-protected Majorana bound states. Here, we report the observation of large magnetoresistances at the interface between a quasi-two-dimensional van der Waals ferromagnet Fe0.29TaS2 and a conventional s-wave superconductor NbN, which provides the possible experimental evidence for the spin-triplet Andreev reflection and induced spin-triplet superconductivity at ferromagnet/superconductor interface arising from Rashba spin-orbit coupling. The temperature, voltage, and interfacial barrier dependences of the magnetoresistance further support the induced spin-triplet superconductivity and spin-triplet Andreev reflection. This discovery, together with the impressive advances in two-dimensional van der Waals ferromagnets, opens an important opportunity to design and probe superconducting interfaces with exotic properties.

Research Organization:
State Univ. of New York (SUNY), Amherst, NY (United States); State Univ. of New York at Buffalo, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Basic Research Programs of China; National Natural Science Foundation of China (NSFC); Beijing Natural Science Foundation; Key Research Program of the Chinese Academy of Sciences; Hubei Provincial Natural Science Foundation of China
Grant/Contract Number:
SC0004890; XDB28000000
OSTI ID:
1831506
Journal Information:
Nature Communications, Vol. 12, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (31)

Magnetoanisotropic spin-triplet Andreev reflection in ferromagnet-Ising superconductor junctions journal April 2018
Spin-polarized supercurrents for spintronics: a review of current progress journal September 2015
Spintronics: Fundamentals and applications journal April 2004
Towards properties on demand in quantum materials journal October 2017
Spin current as a probe of quantum materials journal August 2019
Tunneling Anisotropic Magnetoresistance: A Spin-Valve-Like Tunnel Magnetoresistance Using a Single Magnetic Layer journal September 2004
Gate-tunable room-temperature ferromagnetism in two-dimensional Fe3GeTe2 journal October 2018
Synthetic spin–orbit interaction for Majorana devices journal August 2019
Wireless Majorana Bound States: From Magnetic Tunability to Braiding journal August 2016
Enhanced spin pumping into superconductors provides evidence for superconducting pure spin currents journal April 2018
Spin-orbit coupling as a source of long-range triplet proximity effect in superconductor-ferromagnet hybrid structures journal April 2014
Probing and controlling magnetic states in 2D layered magnetic materials journal September 2019
Observation of Spin-Triplet Superconductivity in Co-Based Josephson Junctions journal March 2010
Odd triplet superconductivity and related phenomena in superconductor-ferromagnet structures journal November 2005
Superconducting 2D System with Lifted Spin Degeneracy: Mixed Singlet-Triplet State journal July 2001
Reversible control of spin-polarized supercurrents in ferromagnetic Josephson junctions journal August 2014
Milestones Toward Majorana-Based Quantum Computing journal August 2016
Tunneling Anisotropic Magnetoresistance and Spin-Orbit Coupling in Fe / GaAs / Au Tunnel Junctions journal August 2007
Next steps of quantum transport in Majorana nanowire devices journal November 2019
Spin-polarized electron tunneling journal March 1994
Proximity effects in superconductor-ferromagnet heterostructures journal September 2005
Generic New Platform for Topological Quantum Computation Using Semiconductor Heterostructures journal January 2010
Magnetoanisotropic Andreev Reflection in Ferromagnet-Superconductor Junctions journal September 2015
Magnetism in two-dimensional van der Waals materials journal October 2018
Equal-spin Andreev reflection and long-range coherent transport in high-temperature superconductor/half-metallic ferromagnet junctions journal May 2012
Magnetic 2D materials and heterostructures journal May 2019
Superconducting spintronics journal April 2015
Anomalous Hall effect mechanisms in the quasi-two-dimensional van der Waals ferromagnet F e 0.29 Ta S 2 journal August 2019
Transition from metallic to tunneling regimes in superconducting microconstrictions: Excess current, charge imbalance, and supercurrent conversion journal April 1982
Emergent functions of quantum materials journal September 2017
Two-dimensional magnetic crystals and emergent heterostructure devices journal February 2019

Similar Records

Related Subjects

36 MATERIALS SCIENCE