公开(公告)号：US11837873B2

公开(公告)日：2023-12-05

申请号：US17345078

申请日：2021-06-11

Applicant: Massachusetts Institute of Technology

Inventor： Hiroki Isobe ,  Qiong Ma ,  Liang Fu ,  Nuh Gedik ,  Suyang Xu ,  Pablo Jarillo-Herrero

IPC: H02J50/20 ,  H02J50/27 ,  H02J50/00 ,  H02M1/42 ,  H02M7/04 ,  B82Y15/00

CPC classification number: H02J50/001 ,  H02J50/27 ,  H02M1/4208 ,  H02M7/04 ,  B82Y15/00

Abstract: Rectification is a process that converts electromagnetic fields into direct current (DC). Such a process underlies a wide range of technologies, including wireless communication, wireless charging, energy harvesting, and infrared detection. Existing rectifiers are mostly based on semiconductor diodes, with limited applicability to small voltages or high frequency inputs. Here, we present an alternative approach to current rectification that uses the electronic properties of quantum crystals without semiconductor junctions. We identify a new mechanism for rectification from skew scattering due to the chirality of itinerant electrons in time-reversal-invariant but inversion-breaking materials. Our calculations reveal large, tunable rectification effects in graphene multilayers and transition metal dichalcogenides. These effects can be used in high-frequency rectifiers by rational material design and quantum wavefunction engineering.

公开(公告)号：US10439123B2

公开(公告)日：2019-10-08

申请号：US16012560

申请日：2018-06-19

Applicant: Massachusetts Institute of Technology

Inventor： Liang Fu ,  Brian J. Skinner

IPC: H01L35/32 ,  H01L35/02 ,  H01L35/14

Abstract: A thermoelectric device includes a thermoelectrode characterized by a band gap less than kBT, where kB is the Boltzmann constant and T is a temperature of the thermoelectrode. The device also includes a magnetic field source, operably coupled to the thermoelectrode, to apply a magnetic field B on the thermoelectrode along a first direction. The device also includes a voltage source, operably coupled to the thermoelectrode, to apply an electric field E on the thermoelectrode along a second direction substantially perpendicular to the first direction so as to generate a heat flow along the second direction.