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[Fizinfo] Szemináriumok - Seminars: Márkus Bence Gábor

Chronological Thread 
  • From: Szeminárium koordinátor <sem-admin AT>
  • To: SZFI Szeminárium <seminar AT>,Fizinfo <fizinfo AT>
  • Cc: Fizinfo <fizinfo AT>
  • Subject: [Fizinfo] Szemináriumok - Seminars: Márkus Bence Gábor
  • Date: Thu, 25 Feb 2021 06:26:01 +0100 (CET)
  • Authentication-results: (amavisd-new); dkim=pass (1024-bit key) reason="pass (just generated, assumed good)"

SZFI SeminarMárkus Bence GáborWigner RCP SZFIUltralong spin lifetime and
superconductivity in doped grapheneTuesday, 2 March 2021, 10:00, video
conference,’s great challenges of
energy storage and informational technologies require new materials. I report
on the preparation and physical properties of Li, Na, Ca, and Yb doped
few-layer graphene. We found ultralong (3−27 ns) spin relaxation time in the
lithium and sodium doped species [1], and superconductivity in the Ca and Yb
doped materials. The emergence of Fano lineshapes in the G-line Raman
spectral region as an indication of strong electron-phonon coupling, attest
the high level of doping for all the metals probed. We find that Na dopes
solely the monolayer graphene as it is known to be inert against graphitic
carbon. In the Ca and Yb doped materials a superconductive phase transition
is observed at ∼ 11 K and at ∼ 6 K, respectively, utilizing conventional
SQUID magnetometry. Superconductivity is confirmed by the presence of
non-linear microwave absorption observed in the ESR spectra. Furthermore, we
observed differences in the critical fields of the prepared materials
compared to their graphite relatives. The obtained materials might find
applications in the field of spintronics, energy storage, and printable
superconductive circuits.References [1] B. G. Márkus, P. Szirmai, K.
Edelthalhammer, P. Eckerlein, A. Hirsch, F. Hauke, N. M. Nemes, Julio C.
Chacón-Torres, B. Náfrádi, L. Forró, T. Pichler, and F. Simon: Ultralong spin
lifetime in light alkali atom doped graphene, ACS Nano 14(6), 7492-7501,
2020.&nbsp;Minden érdeklődőt szívesen látunk! - Everyone is welcome to
attend.Róbert Juhászsem-admin AT

  • [Fizinfo] Szemináriumok - Seminars: Márkus Bence Gábor, Szeminárium koordinátor, 02/25/2021

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