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Interfaces: Hetero- and Collegial A Tribute to Herb Kroemer

Interfaces: Hetero- and Collegial A Tribute to Herb Kroemer. Evelyn L. Hu Harvard School of Engineering & Applied Sciences. Circa 1980’s . . . ‘come join UCSB’. Jim Merz. ‘ We have Herb Kroemer!’. Hetero-interfaces: powerful concept, unifying theme. Herb: generated the fundamental ideas

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Interfaces: Hetero- and Collegial A Tribute to Herb Kroemer

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  1. Interfaces: Hetero- and CollegialA Tribute to Herb Kroemer Evelyn L. Hu Harvard School of Engineering & Applied Sciences

  2. Circa 1980’s . . . ‘come join UCSB’ Jim Merz ‘ We have Herb Kroemer!’

  3. Hetero-interfaces: powerful concept, unifying theme • Herb: • generated the fundamental ideas • delineated the band structure • brought in MBE to give form to idea • INTERFACES (at ‘home’) • Hetero-interfaces • scientifically rich • broad applications • Collegial interfaces • collaborative environment • broadened impact

  4. Opportunities at Interfaces 6.1 angstrom materials Bandgaps and offsets

  5. ‘Quantized Conductance’ at the interfaces of the ‘6.1’ materials with Steve Koester, Colombo Bolognesi, Mason Thomas (~ 1992) Quantized Conductance in InAs wires: The exceptional mobility of electrons, and the smooth interfaces of InAs ‘wires’

  6. Transport between superconductors and semiconductors with Chanh Nguyen, Mason Thomas (~ 1992) Exceptional Conductance at low T, zero voltage: Andreev Reflections

  7. A healthy skepticism, critical judgment, with an openess to new ideas The vision to embrace ‘blue sky’ and follow it to applications. Sharing ideas to promote new collaborations

  8. Interfaces Produce Opportunities Center for Quantized Electronic Structures 1989 - 2000

  9. Interfaces that generate ideas, guidance, collaborations The interface is key ! Type I? Type II? Where is the Fermi level? Innovator, standard bearer, teacher, mentor, collaborator…Thank you, Herb!

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