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[Fizinfo] BME Elm. Fiz. szeminarium, jun 2, Simon Ferenc

From: Janos Asboth <asboth.janos AT ttk.bme.hu>
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Subject: [Fizinfo] BME Elm. Fiz. szeminarium, jun 2, Simon Ferenc
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Meghívó

BME Elméleti Fizika Szeminárium,

jún. 2. péntek 10h15,

1111 Budapest, Budafoki út 8., BME F III. magasföldszint 01.,
Elméleti Fizika Tanszék szemináriumi szoba

Simon Ferenc (BME Fiz. tanszék):
Graphite: the mother of all semimetals or the father of spintronics?

Graphite has been known to mankind since ancient times and has been
intensively studied for more than 80 years. It is also the archetype of
semimetals (metals with a small Fermi surface) and the mother compound of
graphene and other two-dimensional van der Waals heterostructures. Albeit
we have a vast knowledge about graphite, it turns out that its
spin-relaxation properties are poorly understood and a recent revision of
the system [1] yielded the surprisingly long 100 ns spin-lifetime in this
material. This is an order of magnitude longer than the world-record
holding bilayer graphene. It turns out that previous spin-relaxation
studies were in fact not interpreted with the correct description and also
that graphite has a hitherto unexplored symmetry which inevitably leads to
this long spin-relaxation time. We speculate that this enables bulk
graphite to become a viable candidate for using the electron spins as
information carrier units in future spintronics devices.

[1]: B. G. Márkus et al. "Ultralong 100 ns spin relaxation time in graphite
at room temperature", Nat. Comm. 14, 2831 (2023)

Minden érdeklődőt szeretettel várunk.
Asbóth János,
szemináriumi koordinátor

[Fizinfo] BME Elm. Fiz. szeminarium, jun 2, Simon Ferenc, Janos Asboth, 06/01/2023