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Paving the Way Towards 1D Helical Conductors with Fractional Quantum Statistics

  • By Aude Marjolin
  • 22 February 2017

In a letter published in the February 2017 issue of Nature Nanotechnology, Ben Hunt and his collaborators at the Massachusetts Institute of Technology, the University of California Santa Barbara, and the National Institute for Materials Science in Tsukuba, Japan describe how they engineered a graphene electron–hole bilayer device into a helical 1-dimensional (1D) conductor and characterized its transport properties. In a helical 1D conductor, electrons moving in opposite directions also have opposite spin polarizations, and such helical states can be obtained by combining two quantum Hall (QH) edge states with opposite spins and opposite momenta relative to the magnetic field (i.e. opposite chiralities).

My colleagues at MIT came up with this ingenious way of producing helical edge states from two decoupled graphene layers, and then they proved their idea worked with a series of powerful transport experiments,” says Hunt. “I was thrilled to be able to make a contribution to the experiment by using capacitance measurements to help prove that the unique helical states they observe really are edge states.”

Sergey Frolov Among 2017 Young Investigator Award Recipients

  • By Aude Marjolin
  • 22 February 2017

The Office of Naval Research has announced awards of $16 million through its 2017 Young Investigator Program (YIP). The awards were made to 33 scientists whose research holds strong promise across several naval-relevant science and technology areas.

Sergey Frolov was among this year's Young Investigator Award recipients for his proposal "Semiconductor Nanowire-Based Quantum Emulators".

Lillian Chong Receives 2017 Tina and David Bellet Teaching Excellence Award

  • By Aude Marjolin
  • 22 February 2017

Established in 1998 with a gift from Dietrich School alumnus, David Bellet (A&S '67) and his wife Tina, and endowed in 2008 through the family's further generosity, this annual award recognizes outstanding and innovative teaching in undergraduate studies in the Kenneth P. Dietrich School of Arts and Sciences.

Watching

Specific heat measurements of quantum phase transition, towards ionotronic complex oxide nanodevices, quantum machine learning, and erasing information at zero energy cost

Storified by PQI Communication ·
Thu, Feb 23 2017 15:11:05

Towards optimal experimental tests on the reality of the quantum state

Storified by PQI Communication ·
Tue, Feb 21 2017 14:57:14

Physicists are getting a little bit closer to answering one of the oldest and most basic questions of quantum theory: does the quantum state represent reality or just our knowledge of reality?
George C. Knee, a theoretical physicist at the University of Oxford and the University of Warwick, has created an algorithm for designing optimal experiments that could provide the strongest evidence yet that the quantum state is an ontic state (a state of reality) and not an epistemic state (a state of knowledge).

Friction in the vacuum? Molecular or deprotonated water? Machine learning to design functional materials without inversion symmetry, and outer space attacks on your electronic devices

Storified by PQI Communication ·
Mon, Feb 20 2017 17:16:45

New lossless plasmonic metamaterial and testing Wiedemann-Franz's law at the atomic level

Storified by PQI Communication ·
Fri, Feb 17 2017 14:34:04

d-Electron spin transport in LAO/STO and a type-I van der Waals heterostructure made of MoS and ReS

Storified by PQI Communication ·
Thu, Feb 16 2017 17:25:47