603 reputation
514
bio website graphene.nus.edu.sg
location Singapore
age 29
visits member for 3 years, 11 months
seen Oct 17 at 10:50

Research fellow at Graphene Research Centre (GRC), National University of Singapore (NUS). Researching two-dimensional materials to nanotechnological applications.


Jan
11
comment What is the most efficient Organic Photovoltaic solar cell?
This chart Best Research-Cell Efficiencies may be useful.
Jan
9
comment Dirac string on (periodic) compact space
If I have a single Dirac monopole, on a compact space. Can I say this space is non-orientable?
Feb
22
comment Graphene and Klein bottle?
In ordinary insulator the effective Hamiltonian has a topology of a torus, but in HgTe quantum well the effective Hamiltonian is topologically equivalent to a real projective plane (non-orientable manifold) see arxiv.org/abs/1102.3282.
Jan
31
comment What does it mean to say “Gravity is the weakest of the forces”?
No, is not about the difference of coupling constants, is about quadratic divergence of Higgs mass correction (first order radiative correction). I will find a question about it. This area of comments is not appropriate for a more detailed answer.
Jan
31
comment What does it mean to say “Gravity is the weakest of the forces”?
Actually the Hierarchy problem is about the radiative corrections in the Higgs propagator. The large discrepancy of coupling constants is not a real problem.
Jan
29
comment How can I infer the topology of a quantum state (or band) from its Chern number?
Thank you for the answer. But, are there any relationship between Chern number and Genus (number of handles) or non-orientability? What's mean these numbers?
Jan
24
comment How can I infer the topology of a quantum state (or band) from its Chern number?
Not matter, the question could be undertood without any equation. Thank you for the help.