News

Chirality transfer from molecules to crystals: A Nature Chemistry publication

By using scanning tunnelling microscopy (STM), photoelectron diffraction and density functional theory, a microscopic insight is reported how the chiral hemifullerene (C30H12) molecule arranges copper surface atoms in its vicinity into a chiral structure. The results could contribute to the development of new synthetic materials and drugs.

Figure: STM image of a two-dimensional copper island decorated with M- and P-type hemifullerene molecules

Quantum-critical circuits: a new Nature pubication

In a collaboration with Stanford, researchers in the EQP 'Momentum' Group of the Institute of Physics studied how electrons 'cease to exist' in a nano-circuit. Researchers Pascu Moca and Gergely Zarand (group leader) collaborated with the experimental group of David Goldhaber-Gordon at Stanford to realize and investigate in detail a so-called quantum critical state by using nano-electronic circuits.

The Stanford group built an artificial atom, attached to external electrodes. With the help of the computations of the Momentum group, they managed to tune the circuit to a state, where the artificial atom destroys every electron that passes through it. They observed in detail how – in agreement with the theoretical computations – this new quantum state forms where electrons in the electrodes loose their usual properties and cease to exist in some sense [Keller et al, Nature 526, 237 (2015)].

A. J. Keller, L. Peeters, C. P. Moca, I. Weymann, D. Mahalu, V. Umansky, G. Zaránd & D. Goldhaber-Gordon: Universal Fermi liquid crossover and quantum criticality in a mesoscopic system, Nature 526, 237 (2015).

Publication in Nature Materials

The international research team lead by Sándor Bordács and István Kézsmárki discovered a new class of magnetic skyrmions, the so-called Néel-type skyrmions. This novel topological spin texture has a ferroelectric dressing, hence, besides a magnetic manipulation it can also be controlled via electric fields. These results have been recently published in Nature Materials.

Homepage of the Lendület group: http://magnetooptics.phy.bme.hu

The article: http://www.nature.com/nmat/journal/vaop/ncurrent/full/nmat4402.html

2nd Grandmaster PhD Workshop in Physics

The Institute of Physics at BUTE organizes the international students' conference "2nd Grandmaster PhD Workshop in Physics'' between September 6th and 11th, 2015. The conference is an opportunity for master's students, PhD students and junior postdocs to presents their scienctific achievements for a scientific audience in a relaxed atmosphere.

You can find the detialed programme at http://grandmaster.phy.bme.hu

Students who are interested are required to register for an oral talk or a poster presentation by September 18th. The presentations will be organized in sections subsequently. There are no topical restrictions. As the conference will be during the first week of classes. There will be participants also from German, Czech and Austrian universities. There is no registration fee.

There will be a plenary tutorial session by internationally renowned researchers on the physics of skyrmions on September 8th. The programme is available at http://magnetooptics.phy.bme.hu/2nd-grandmaster/program/plenary-talks/

Pages