Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic

[cirr]

One or two of the listed names below are gonna win the Nobel Prize for Physics in the not-too-distant future。



Cui-Zu Chang1,2,*, Jinsong Zhang1,*, Xiao Feng1,2,*, Jie Shen2,*, Zuocheng Zhang1, Minghua Guo1, Kang Li2, Yunbo Ou2, Pang Wei2, Li-Li Wang2, Zhong-Qing Ji2, Yang Feng1, Shuaihua Ji1, Xi Chen1, Jinfeng Jia1, Xi Dai2, Zhong Fang2, Shou-Cheng Zhang3, Ke He2,†, Yayu Wang1,†, Li Lu2, Xu-Cun Ma2, Qi-Kun Xue1,2,†
+ Author Affiliations

1State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China.
2Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, The Chinese Academy of Sciences, Beijing 100190, China.
3Department of Physics, Stanford University, Stanford, CA 94305–4045, USA.
↵†Corresponding author. E-mail: qkxue@mail.tsinghua.edu.cn (Q.K.X.); kehe@iphy.ac.cn (K.H.); yayuwang@tsinghua.edu.cn (Y.W.)
↵* These authors contributed equally to this work.

Abstract

The quantized version of the anomalous Hall effect has been predicted to occur in magnetic topological insulators, but the experimental realization has been challenging. Here, we report the observation of the quantum anomalous Hall (QAH) effect in thin films of Cr-doped (Bi,Sb)2Te3, a magnetic topological insulator. At zero magnetic field, the gate-tuned anomalous Hall resistance reaches the predicted quantized value of h/e2, accompanied by a considerable drop of the longitudinal resistance. Under a strong magnetic field, the longitudinal resistance vanishes, whereas the Hall resistance remains at the quantized value. The realization of the QAH effect may lead to the development of low-power-consumption electronics.

http://www.sciencemag.org/content/early/2013/03/13/science.1234414

 

[Ayush]

congrats. .

 

[Skyman]

Nobel Prize is a political propaganda prize. It's only given to anti-China dissidents. Only a fool or a white worshipper takes the Nobel Prize seriously.

 

[+4vsgorillas-Apebane]

Great achievement but....

FOOK THE NOBEL PRIZE -

A panel of old whites presuming to weigh and judge the rest of humanity.

 

[siegecrossbow]

The science is way over my head but congrats to the scientists nonetheless. It must have taken them decades of hard work to achieve their results.

 

[cirr]

Nobel Prize is a political propaganda prize. It's only given to anti-China dissidents. Only a fool or a white worshipper takes the Nobel Prize seriously.

I am sure you are referring to the Nobel Peace Prize，which is now more a pig's prize than a peace prize。

 

[Cherokee]

Nobel Prize is a political propaganda prize. It's only given to anti-China dissidents. Only a fool or a white worshipper takes the Nobel Prize seriously.

Great achievement but....

FOOK THE NOBEL PRIZE -

A panel of old whites presuming to weigh and judge the rest of humanity.

Well only nobel peace prize is a political tool . Rest have been awarded pretty fairly .....

 

[Skyman]

Well only nobel peace prize is a political tool . Rest have been awarded pretty fairly .....

Nonsense, Chinese scientist Tu Youyou was ignored by Nobel prize but she got the Lasker Award.
If a person like that don't get it, then the whole Nobel system is just western propaganda.

 

[Cherokee]

Nonsense, Chinese scientist Tu Youyou was ignored by Nobel prize but she got the Lasker Award.
If a person like that don't get it, then the whole Nobel system is just western propaganda.

Lasker award is also Western award , Infact an American award while nobel prize is a Scandinavian award .

 

[shuttler]

Chinese scientists observe IT-advancing phenomenon
Xinhua | 2013-4-11 8:27:36
By Agencies

Chinese scientists observe IT-advancing phenomenon - SCI_TECH - Globaltimes.cn

Chinese scientists have made the very first experimental observation of a phenomenon known as the quantum anomalous Hall (QAH) effect, a discovery that will help accelerate the IT revolution and in developing low-power-consumption electronics.

Yang Zhenning, winner of a Nobel Prize in Physics, said at a press conference on Wednesday that the research was ground-breaking in the field, rating it as worthy of a Nobel Prize.

QAH effect is one of the most important physical effects that had remained unobserved worldwide, according to academic Xue Qikun, who has led a team working on the subject since 2008.

The discovery, if it is harnessed in the future, will help reduce unnecessary energy consumption stemming from irregular electron collisions, according to Xue.

"The technology may even bring about a supercomputer in the shape of an iPad," predicted Xue.

The QAH effect was predicted to occur in magnetic topological insulators by American scientist Edwin Hall more than 130 years ago. It is a kind of quantum Hall effect realized at zero magnetic field.

The quantum Hall effect describes how a voltage appears at both semiconductor edges when the electrons on a current-carrying semiconductor experience a force while being kept in a magnetic field, Xue explained.

The academic said that although leapfrog development has been made in semiconductor technology, the unsettled problem of thermal dissipation caused by irregular movements of electrons has created a bottleneck for the IT industry's further development.

The research, launched by a team of scientists from Tsinghua University and the Institution of Physics under the Chinese Academy of Science, was conducted on more than 1,000 samples at zero magnetic fields.

However, there remains a long way ahead for the observation to be taken into practical application due to limited research resources at present, Xue added.